Form of Underwriting Agreement

1. INTRODUCTORY. Integrated Silicon Solution, Inc., a Delaware corporation (the “Company”), proposes to issue and sell 6,025,000 shares (the “Company Firm Stock”) of the Company’s Common Stock, $0.0001 par value (the “Common Stock”), and the selling stockholders named in Schedule B hereto (the “Selling Stockholders”), severally and not jointly, propose to sell 75,000 shares of Common Stock (the “Selling Stockholder Firm Stock”), pursuant to the terms of this Agreement, to the several underwriters named in Schedule A hereto (the “Underwriters,” or, each, an “Underwriter”). The Company Firm Stock and the Selling Stockholder Firm Stock so proposed to be sold are collectively referred to herein as the “Firm Stock”. The Company also proposes to sell to the Underwriters, upon the terms and subject to the conditions set forth in Section 3 hereof, up to an additional 915,000 shares of Common Stock (the “Optional Stock”). The Firm Stock and the Optional Stock are hereinafter collectively referred to as the “Stock”. Deutsche Bank Securities Inc. (“Deutsche Bank”), SG Cowen Securities Corporation (“SG Cowen”), Needham & Company, Inc., WR Hambrecht+Co, LLC and ThinkEquity Partners LLC are acting as representatives of the several Underwriters and in such capacity are hereinafter referred to as the “Representatives.”

2. (I) REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The Company represents and warrants to, and agrees with, the several Underwriters as follows:

(a) A registration statement on Form S-3 File No. 333-110931 (the “Initial Registration Statement”) in respect of the Stock has been filed with the Securities and Exchange Commission (the “Commission”); the Initial Registration Statement and any post-effective amendment thereto, each in the form heretofore delivered to you for each of the other Underwriters, excluding exhibits thereto but including all documents incorporated by reference in the prospectus contained therein, have been declared effective by the Commission in such form; other than a registration

statement, if any, increasing the size of the offering (a “Rule 462(b) Registration Statement”), filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended (the “Securities Act”) and the rules and regulations (the “Rules and Regulations”) of the Commission promulgated thereunder, which became effective upon filing, no other document with respect to the Initial Registration Statement or document incorporated by reference therein has heretofore been filed with the Commission; and, to the Company’s knowledge after reasonable inquiry, no stop order suspending the effectiveness of the Initial Registration Statement, any post-effective amendment thereto or the Rule 462(b) Registration Statement, if any, has been issued and no proceeding for that purpose has been initiated or threatened by the Commission (any preliminary prospectus included in the Initial Registration Statement or filed with the Commission pursuant to Rule 424(a) of the Rules and Regulations is hereinafter called a “Preliminary Prospectus”); the various parts of the Initial Registration Statement and the Rule 462(b) Registration Statement, if any, including all exhibits thereto and including (i) the information contained in the form of final prospectus filed with the Commission pursuant to Rule 424(b) under the Securities Act and deemed by virtue of Rule 430A under the Securities Act to be part of the Initial Registration Statement at the time it was declared effective, and (ii) the documents incorporated by reference in the prospectus contained in the Initial Registration Statement at the time such part of the Initial Registration Statement became effective, each as amended at the time such part of the Initial Registration Statement became effective or such part of the Rule 462(b) Registration Statement, if any, became or hereafter becomes effective, are hereinafter collectively called the “Registration Statements”; and such final prospectus, in the form first filed pursuant to Rule 424(b) under the Securities Act, is hereinafter called the “Prospectus, any reference herein to any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include the documents incorporated by reference therein pursuant to Item 12 of Form S-3 under the Securities Act, as of the date of such Preliminary Prospectus or Prospectus, as the case may be, any reference to any amendment or supplement to any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any documents filed after the date of such Preliminary Prospectus or Prospectus, as the case may be, under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and incorporated by reference in such Preliminary Prospectus or Prospectus, as the case may be; and any reference to any amendment to the Registration Statements shall be deemed to refer to and include any annual report of the Company filed pursuant to Section 13(a) or 15(d) of the Exchange Act after the effective date of the Initial Registration Statement that is incorporated by reference in the Registration Statements. No document has been or will be prepared or distributed in reliance on Rule 434 under the Securities Act. To the Company’s knowledge after reasonable inquiry, no order preventing or suspending the use of any Preliminary Prospectus has been issued by the Commission.

(b) The Initial Registration Statement conforms (and the Rule 462(b) Registration Statement, if any, the Prospectus and any amendments or supplements to either of the Registration Statements or the Prospectus, when they become effective or are filed with the Commission, as the case may be, will conform) in all material respects to the requirements of the Securities Act and the Rules and Regulations and do not and will not, as of the applicable effective date (as to the Registration Statements and any amendment or supplement thereto) and as of the applicable filing date (as to the Prospectus and any amendment or supplement thereto) contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances in which they were made, not misleading; provided, however, that the foregoing representations and warranties shall not apply to information contained in or omitted from the Registration Statements or the Prospectus or any such amendment or supplement thereto in reliance upon, and in conformity with, written information furnished to the Company through the Representatives by or on behalf of any Underwriter specifically for inclusion therein, which information the parties hereto agree is limited to the Underwriter’s Information (as defined in Section 16). The documents incorporated

by reference in the Prospectus, when they became effective or were filed with the Commission, as the case may be, conformed in all material respects to the requirements of the Securities Act or the Exchange Act, as applicable, and the rules and regulations of the Commission thereunder, and none of such documents contained any untrue statement of a material fact or omitted to state any material fact required to be stated therein or necessary to make the statements therein not misleading; and any further documents so filed and incorporated by reference in the Prospectus, when such documents become effective or are filed with Commission, as the case may be, will conform in all material respects to the requirements of the Securities Act or the Exchange Act, as applicable, and the rules and regulations of the Commission thereunder and will not contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading.

(c) The Company and each of its subsidiaries (as defined in Section 14) have been duly incorporated and are validly existing as corporations in good standing under the laws of their respective jurisdictions of incorporation, are duly qualified to do business and are in good standing as foreign corporations in each jurisdiction in which their respective ownership or lease of property or the conduct of their respective businesses requires such qualification, and have all corporate power and authority necessary to own or hold their respective properties and to conduct the businesses in which they are engaged, except where the failure to so qualify or have such power or authority would not have, singularly or in the aggregate, a material adverse effect on the condition (financial or otherwise), results of operations, business or prospects of the Company and its subsidiaries taken as a whole (a “Material Adverse Effect”). A true and correct list of all of the Company’s subsidiaries are listed on Exhibit 21.1 to the Company’s annual report filed on Form 10-K for the fiscal year ended September 30, 2003.

(d) This Agreement has been duly authorized, executed and delivered by the Company.

(e) The Stock to be issued and sold by the Company to the Underwriters hereunder has been duly and validly authorized and, when issued and delivered against payment therefor as provided herein, will be duly and validly issued, fully paid and nonassessable and free of any preemptive or similar rights and will conform to the description thereof incorporated by reference in the Prospectus.

(f) The Company has an authorized capitalization as set forth in the Prospectus. All of the issued shares of capital stock of the Company have been duly and validly authorized and issued, are fully paid and non-assessable and conform to the description thereof contained in the Prospectus. None of the outstanding shares of Common Stock were issued in violation of any preemptive rights, rights of first refusal or other similar rights to subscribe for or purchase securities of the Company other than such rights that have been waived. There are no authorized or outstanding options, warrants, preemptive rights, rights of first refusal or other rights to purchase, or equity or debt securities convertible into or exchangeable or exercisable for, any capital stock of the Company or any of its subsidiaries other than as set forth in the Prospectus.

(g) All the outstanding shares of capital stock of each subsidiary of the Company have been duly authorized and validly issued, are fully paid and nonassessable and, except to the extent set forth in the Prospectus, are owned by the Company directly or indirectly through one or more wholly-owned subsidiaries, free and clear of any claim, lien, encumbrance, security interest, restriction upon voting or transfer or any other claim of any third party other than restrictions under applicable securities laws.

(h) The execution, delivery and performance of this Agreement by the Company and the consummation of the transactions contemplated hereby will not (i) conflict with or result in a

breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other material agreement or instrument to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries is bound or to which any of the property or assets of the Company or any of its subsidiaries is subject, (ii) result in any violation of the provisions of the charter or by-laws of the Company or any of its subsidiaries or (iii) result in any violation of any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its subsidiaries or any of their properties or assets.

(i) Except for the registration of the Stock under the Securities Act and such consents, approvals, authorizations, registrations or qualifications as may be required under the Exchange Act and applicable state or foreign securities laws, the National Association of Securities Dealers, Inc. and the Nasdaq National Market in connection with the purchase and distribution of the Stock by the Underwriters, no consent, approval, authorization or order of, or filing or registration with, any such court or governmental agency or body is required for the execution, delivery and performance of this Agreement by the Company and the consummation of the transactions contemplated hereby.

(j) The Company has taken all necessary actions to ensure that it is in compliance in all material respects with all applicable provisions of the Sarbanes-Oxley Act of 2002 (the “Sarbanes-Oxley Act”) that are in effect and is actively taking steps to ensure that it will be in compliance in all material respects with other applicable provisions of the Sarbanes-Oxley Act not currently in effect upon the effectiveness of such provisions.

(k) The Company has taken all necessary actions to ensure that it is in compliance in all material respects with all applicable corporate governance requirements set forth in the Nasdaq National Market (“Nasdaq”) Marketplace Rules that are in effect and is actively taking steps to ensure that it will be in compliance in all material respects with other applicable corporate governance requirements set forth in the Nasdaq Marketplace Rules not currently in effect upon and at all times after the effectiveness of such requirements.

(l) Ernst & Young LLP, who have expressed their opinions on the audited financial statements and related schedules included or incorporated by reference in the Registration Statements and the Prospectus, are independent public accountants as required by the Securities Act and the Rules and Regulations.

(m) The financial statements, together with the related notes and schedules, included or incorporated by reference in the Prospectus and in each Registration Statement fairly present the financial position and the results of operations and changes in financial position of the Company and its consolidated subsidiaries and other consolidated entities at the respective dates or for the respective periods therein specified. Such statements and related notes and schedules have been prepared in accordance with generally accepted accounting principles applied on a consistent basis except as may be set forth in the Prospectus. The financial statements, together with the related notes and schedules, included in the Prospectus comply in all material respects with the Securities Act and the Rules and Regulations thereunder. No other financial statements or supporting schedules or exhibits are required by the Securities Act or the Rules and Regulations thereunder to be included or incorporated by reference in the Prospectus.

(n) Neither the Company nor any of its subsidiaries has sustained, since the date of the latest audited financial statements included or incorporated by reference in the Prospectus, any material loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree,

otherwise than as set forth or contemplated in the Prospectus; and, since such date, there has not been any change in the capital stock (other than issuances of options in the ordinary course of business and pursuant to the Plans (as defined herein) disclosed in the Prospectus or the issuance of Common Stock upon the exercise of outstanding options and warrants or pursuant to the Company’s employee stock purchase plan) or long-term debt of the Company or any of its subsidiaries or any material adverse change, or any development involving a material adverse change, in or affecting the business, general affairs, management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries taken as a whole, otherwise than as set forth or contemplated in the Prospectus.

(o) Except as set forth in the Prospectus, there is no legal or governmental proceeding pending to which the Company or any of its subsidiaries is a party or of which any property or assets of the Company or any of its subsidiaries is the subject which is required to be described in the Registration Statement or the Prospectus and is not described therein, or which, singularly or in the aggregate, if determined adversely to the Company or any of its subsidiaries, might have a Material Adverse Effect or would prevent or adversely affect the ability of the Company to perform its obligations under this Agreement; and to the best of the Company’s knowledge, no such proceedings are threatened or contemplated by any governmental authorities or threatened by others.

(p) Neither the Company nor any of its subsidiaries (i) is in violation of its charter or by-laws, (ii) is in default in any respect, and no event has occurred which, with notice or lapse of time or both, would constitute such a default, in the due performance or observance of any term, covenant or condition contained in any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which it is a party or by which it is bound or to which any of its property or assets is subject or (iii) is in violation in any respect of any law, ordinance, governmental rule, regulation or court decree to which it or its property or assets may be subject except any violations or defaults with respect to (i), (ii) and/or (iii) which, singularly or in the aggregate, would not have a Material Adverse Effect.

(q) The Company and each of its subsidiaries possess all licenses, certificates, authorizations and permits issued by, and have made all declarations and filings with, the appropriate local, state, federal or foreign regulatory agencies or bodies which are necessary for the ownership of their respective properties or the conduct of their respective businesses as described in the Prospectus except where any failures to possess or make the same, singularly or in the aggregate, would not have a Material Adverse Effect, and the Company has not received notification of any revocation or modification of any such license, authorization or permit and has no reason to believe that any such license, certificate, authorization or permit will not be renewed.

(r) Neither the Company nor any of its subsidiaries is or, after giving effect to the offering of the Stock and the application of the proceeds thereof as described in the Prospectus will become an “investment company” within the meaning of the Investment Company Act of 1940, as amended and the rules and regulations of the Commission thereunder.

(s) Neither the Company nor any of its officers, directors or affiliates, has taken or will take, directly or indirectly, any action designed or intended to stabilize or manipulate the price of any security of the Company, or which caused or resulted in, or which might in the future reasonably be expected to cause or result in, stabilization or manipulation of the price of any security of the Company.

(t) To the Company’s best knowledge, the Company and its subsidiaries own or possess the right to use all patents, trademarks, trademark registrations, service marks, service mark

registrations, trade names, copyrights, licenses, inventions, trade secrets and rights described in the Prospectus as being owned or possessed by them and own or possess the right to use all intellectual property necessary for the conduct of their respective businesses, and the Company is not aware of any claim to the contrary or any challenge by any other person to the rights of the Company and its subsidiaries with respect to the foregoing other than for such claims and challenges as would not be reasonably expected to have, individually or in the aggregate, a Material Adverse Effect. To the Company’s knowledge, the Company’s business as now conducted and as proposed to be conducted does not and will not infringe or conflict with any patents, trademarks, service marks, trade names, copyrights, trade secrets, licenses or other intellectual property or franchise right of any person. Except as described in the Prospectus, no claim has been made or is likely to be made against the Company alleging the infringement by the Company of any patent, trademark, service mark, trade name, copyright, trade secret, license in or other intellectual property right or franchise right of any person.

(u) The Company and each of its subsidiaries have good and marketable title in fee simple to, or have valid rights to lease or otherwise use, all items of real or personal property which are material to the business of the Company and its subsidiaries taken as a whole, in each case free and clear of all liens, encumbrances, claims and defects that may result in a Material Adverse Effect.

(v) The Company is not aware that any key employee or significant group of employees of the Company or any subsidiary plans to terminate employment with the Company or any such subsidiary.

(w) The Company and its subsidiaries and any “employee benefit plan” (as defined under the Employee Retirement Income Security Act of 1974, as amended, and the regulations and published interpretations thereunder (collectively, “ERISA”)) established or maintained by the Company, its subsidiaries or their “ERISA Affiliates” (as defined below) are in compliance in all material respects with ERISA. “ERISA Affiliate” means, with respect to the Company or a subsidiary, any member of any group of organizations described in Sections 414(b), (c), (m) or (o) of the Internal Revenue Code of 1986, as amended, and the regulations and published interpretations thereunder (the “Code”) of which the Company or such subsidiary is a member. No “reportable event” (as defined under ERISA) has occurred or is reasonably expected to occur with respect to any “employee benefit plan” established or maintained by the Company, its subsidiaries or any of their ERISA Affiliates. No “employee benefit plan” established or maintained by the Company, its subsidiaries or any of their ERISA Affiliates, if such “employee benefit plan” were terminated, would have any “amount of unfunded benefit liabilities” (as defined under ERISA). Neither the Company, its subsidiaries nor any of their ERISA Affiliates has incurred or reasonably expects to incur any liability under (i) Title IV of ERISA with respect to termination of, or withdrawal from, any “employee benefit plan” or (ii) Sections 412, 4971, 4975 or 4980B of the Code. Each “employee benefit plan” established or maintained by the Company, its subsidiaries or any of their ERISA Affiliates that is intended to be qualified under Section 401(a) of the Code is so qualified and nothing has occurred, whether by action or failure to act, which would cause the loss of such qualification

(x) Except as would not, individually or in the aggregate, result in a Material Adverse Effect (i) neither the Company nor any of its subsidiaries is in violation of any federal, state, local or foreign law or regulation relating to pollution or protection of human health or the environment (including, without limitation, ambient air, surface water, groundwater, land surface or subsurface strata) or wildlife, including without limitation, laws and regulations relating to emissions, discharges, releases or threatened releases of chemicals, pollutants, contaminants, wastes, toxic substances, hazardous substances, petroleum and petroleum products

(collectively, “Materials of Environmental Concern”), or otherwise relating to the manufacture, processing, distribution, use, treatment, storage, disposal, transport or handling of Materials of Environment Concern (collectively, “Environmental Laws”), which violation includes, but is not limited to, noncompliance with any permits or other governmental authorizations required for the operation of the business of the Company or its subsidiaries under applicable Environmental Laws, or noncompliance with the terms and conditions thereof, nor has the Company or any of its subsidiaries received any written communication, whether from a governmental authority, citizens group, employee or otherwise, that alleges that the Company or any of its subsidiaries is in violation of any Environmental Law; (ii) there is no claim, action or cause of action filed with a court or governmental authority, no investigation with respect to which the Company has received written notice, and no written notice by any person or entity alleging potential liability for investigatory costs, cleanup costs, governmental responses costs, natural resources damages, property damages, personal injuries, attorneys’ fees or penalties arising out of, based on or resulting from the presence, or release into the environment, of any Material of Environmental Concern at any location owned, leased or operated by the Company or any of its subsidiaries, now or in the past (collectively, “Environmental Claims”), pending or, to the best of the Company’s knowledge, threatened against the Company or any of its subsidiaries or any person or entity whose liability for any Environmental Claim the Company or any of its subsidiaries has retained or assumed either contractually or by operation of law; and (iii) to the best of the Company’s knowledge, there are no past or present actions, activities, circumstances, conditions, events or incidents, including, without limitation, the release, emission, discharge, presence or disposal of any Material of Environmental Concern, that reasonably could result in a violation of any Environmental Law or form the basis of a potential Environmental Claim against the Company or any of its subsidiaries or against any person or entity whose liability for and Environmental Claim the Company or any of its subsidiaries has retained or assumed either contractually or by operation of law.

(y) The Company and its subsidiaries have filed all necessary federal, state and foreign income and franchise tax returns and have paid all taxes shown as due thereon to the extent due to be paid prior to the date hereof and, to the extent not so due, have made adequate reserves on their financial statements; and the Company has no knowledge of any tax deficiency that has been or might be asserted or threatened against the Company or its subsidiaries that could result in a Material Adverse Effect.

(z) The Company and each of its subsidiaries carry, or are covered by, insurance in such amounts and covering such risks as is adequate for the conduct of their respective businesses and the value of their respective properties and as is customary for companies engaged in similar businesses in similar industries.

(aa) The Company and each of its subsidiaries maintains a system of internal accounting controls sufficient to provide reasonable assurances that (i) transactions are executed in accordance with management’s general or specific authorization, (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with generally accepted accounting principles and to maintain accountability for assets, (iii) access to assets is permitted only in accordance with management’s general or specific authorization, and (iv) the recorded accountability for assets is compared with existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

(bb) The minute books of the Company and each of its subsidiaries have been made available to the Underwriters and counsel for the Underwriters, and such books (i) contain a complete summary of all meetings and actions of the board of directors (including each committee thereof) and stockholders of the Company and each of its subsidiaries since the time of its respective

incorporation through the date of the latest meeting and action, and (ii) accurately in all material respects reflect all transactions referred to in such minutes.

(cc) There is no franchise, lease, contract, agreement or document required by the Securities Act or by the Rules and Regulations to be described in the Prospectus or to be filed as an exhibit to the Registration Statements which is not described or filed therein as required; and all descriptions of any such franchises, leases, contracts, agreements or documents contained in the Registration Statements are accurate and complete descriptions of such documents in all material respects. Other than as described in the Prospectus, no such franchise, lease, contract or agreement has been suspended or terminated for convenience or default by the Company or any of the other parties thereto, and the Company has not received notice or any other knowledge of any such pending or threatened suspension or termination, except for such pending or threatened suspensions or terminations that would not reasonably be expected to, singularly or in the aggregate, have a Material Adverse Effect.

(dd) No relationship, direct or indirect, exists between or among the Company on the one hand, and the directors, officers, stockholders, customers or suppliers of the Company on the other hand, which is required to be described in the Prospectus by the Securities Act or the Rules and Regulations and which is not so described.

(ee) No person or entity has the right to require registration of shares of Common Stock or other securities of the Company because of the filing or effectiveness of the Registration Statements, except for persons and entities who have expressly waived such right or who have been given timely and proper notice and have failed to exercise such right within the time or times required under the terms and conditions of such right.

(ff) Neither the Company nor any of its subsidiaries own any “margin securities” as that term is defined in Regulation U of the Board of Governors of the Federal Reserve System (the “Federal Reserve Board”), and none of the proceeds of the sale of the Stock will be used, directly or indirectly, for the purpose of purchasing or carrying any margin security, for the purpose of reducing or retiring any indebtedness which was originally incurred to purchase or carry any margin security or for any other purpose which might cause any of the Securities to be considered a “purpose credit” within the meanings of Regulation T, U or X of the Federal Reserve Board.

(gg) Neither the Company nor any of its subsidiaries is a party to any contract, agreement or understanding with any person that would give rise to a valid claim against the Company or the Underwriters for a brokerage commission, finder’s fee or like payment in connection with the offering and sale of the Stock.

(hh) The Stock is listed or has been approved for listing subject to notice of issuance on the Nasdaq Stock Market’s National Market.

(ii) Neither the Company nor any of its subsidiaries nor, to the best of the Company’s knowledge, any employee or agent of the Company or any subsidiary, has made any contribution or other payment to any official of, or candidate for, any federal, state or foreign office in violation of any law or of the character required to be disclosed in the Prospectus.

(jj) There are no outstanding loans, advances (except normal advances for business expense in the ordinary course of business) or guarantees or indebtedness by the Company to or for the benefit of any of the officers or directors of the Company, except as disclosed in the Prospectus.

(II) REPRESENTATIONS AND WARRANTIES AND AGREEMENTS OF THE SELLING STOCKHOLDERS. Each Selling Stockholder severally, and as to itself only, represents and warrants to, and agrees with, the several Underwriters that such Selling Stockholder:

(a) Immediately prior to the First Closing Date (as defined in Section 3 hereof) the Selling Stockholder will have, good and valid title to the shares of Firm Stock to be sold by the Selling Stockholder hereunder on such date, free and clear of all liens, encumbrances, equities or claims; and upon delivery of such shares and payment therefor pursuant hereto, good and valid title to such shares, free and clear of all liens, encumbrances, equities or claims, will pass to the several Underwriters.

(b) Has full right, power and authority to enter into this Agreement; the execution, delivery and performance of this Agreement by such Selling Stockholder and the consummation by such Selling Stockholder of the transactions contemplated hereby will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which such Selling Stockholder is a party or by which the Selling Stockholder is bound or to which any of the property or assets of the Selling Stockholder is subject, nor will such actions result in any violation of any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Selling Stockholder or the property or assets of the Selling Stockholder; and, except for the registration of the Firm Stock under the Securities Act and such consents, approvals, authorizations, registrations or qualifications as may be required under the Exchange Act and applicable state securities laws, the National Association of Securities Dealers, Inc. and the Nasdaq National Market in connection with the purchase and distribution of the Firm Stock by the Underwriters, no consent, approval, authorization or order of, or filing or registration with, any such court or governmental agency or body is required for the execution, delivery and performance of this Agreement by such Selling Stockholder and the consummation by the Selling Stockholder of the transactions contemplated hereby.

(c) Such Selling Stockholder has read the Registration Statements and, to such Selling Stockholder’s actual knowledge, without having conducted any independent check or verification, the Registration Statements do not, and the Prospectus and any further amendments or supplements to the Registration Statements or the Prospectus will not, as of the applicable effective date (as to the Registration Statements and any amendment thereto) and as of the applicable filing date (as to the Prospectus and any amendment or supplement thereto) contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances in which they were made, not misleading.

(d) Such Selling Stockholder has not taken and will not take, directly or indirectly, any action designed to or that might reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the any shares of Firm Stock.

3. PURCHASE SALE AND DELIVERY OF OFFERED SECURITIES. On the basis of the representations, warranties and agreements herein contained, but subject to the terms and conditions herein set forth, (a) the Company agrees to issue and sell the Company Firm Stock to the several Underwriters, (b) each Selling Stockholder agrees, severally and not jointly, to sell to the several Underwriters the number of shares of Selling Stockholder Firm Stock set forth opposite such Selling Stockholder’s name on Schedule B hereto, and (c) each Underwriter agrees, severally and not jointly, to purchase from the Company and the Selling Stockholders that number of shares of Firm Stock set forth opposite the name of such Underwriter in Schedule A hereto (subject to adjustment by SG Cowen to eliminate fractions). The

number of shares of Firm Stock to be purchased by each Underwriter from the Company and each Selling Stockholder hereunder shall, as nearly as practicable, be in the same proportion as the number of shares of Firm Stock being purchased by such Underwriter bears to the total number of shares of Firm Stock to be purchased by all of the Underwriters hereunder.

The purchase price per share to be paid by the Underwriters to the Company and the Selling Stockholders for the Stock will be $ per share (the “Purchase Price”).

The Company and the Selling Stockholders will deliver or cause to be delivered the Firm Stock to the Representatives for the respective accounts of the several Underwriters (in the form of definitive certificates, issued in such names and in such denominations as the Representatives may direct by notice in writing to the Company given at or prior to 12:00 Noon, New York time, on the second full business day preceding the First Closing Date (as defined below)) against payment of the aggregate Purchase Price therefor by same-day wire transfer to an account at a bank designated by the Company and each of the Selling Stockholders, as applicable, all at the offices of Wilson Sonsini Goodrich & Rosati, a Professional Corporation, 650 Page Mill Road, Palo Alto, California. Time shall be of the essence, and delivery at the time and place specified pursuant to this Agreement is a further condition of the obligations of each Underwriter hereunder. The time and date of the delivery and closing shall be at 7:00 A.M., California time, on , in accordance with Rule 15c6-1 of the Exchange Act. Delivery of the Firm Stock will be made by credit through full fast transfer to accounts of the Depository trust Company unless the Underwriters have previously indicated that certificates are required at the Closing. The time and date of such payment and delivery are herein referred to as the “First Closing Date.” The First Closing Date and the location of delivery of, and the form of payment for, the Firm Stock may be varied by agreement between the Company, the Selling Stockholders, SG Cowen and Deutsche Bank.

The Company and the Selling Stockholders shall make the certificates representing the Firm Stock available to the Representatives for examination on behalf of the Underwriters in Palo Alto, California at least twenty-four hours prior to the First Closing Date.

For the purpose of covering any over-allotments in connection with the distribution and sale of the Firm Stock as contemplated by the Prospectus, the Underwriters may purchase from the Company up to all of the Optional Stock. The price per share to be paid for the Optional Stock shall be the Purchase Price. The Company agrees to sell to the Underwriters the numbers of shares of Optional Stock specified in the written notice by SG Cowen described below and the Underwriters agree, severally and not jointly, to purchase such shares of Optional Stock. Such shares of Optional Stock shall be purchased for the account of each Underwriter in the same proportion as the number of shares of Firm Stock set forth opposite such Underwriter’s name bears to the total number of shares of Firm Stock (subject to adjustment by SG Cowen to eliminate fractions). The option granted hereby may be exercised as to all or any part of the Optional Stock at any time, and from time to time, up to three times, not more than thirty (30) days subsequent to the date of this Agreement. No Optional Stock shall be sold and delivered unless the Firm Stock previously has been, or simultaneously is, sold and delivered. The right to purchase the Optional Stock or any portion thereof may be surrendered and terminated at any time upon notice by SG Cowen to the Company.

The option granted hereby may be exercised by written notice being given to the Company by SG Cowen setting forth the number of shares of the Optional Stock to be purchased by the Underwriters and the date and time for delivery of and payment for the Optional Stock. Each date and time for delivery of and payment for the Optional Stock (which may be the First Closing Date, but not earlier) is herein called an “Option Closing Date” and shall in no event be earlier than two (2) business days nor later than five (5) business days after written notice is given. (The Option Closing Dates and the First Closing Date are herein called the “Closing Dates”.)

The Company will deliver the Optional Stock to the Underwriters (in the form of definitive certificates, issued in such names and in such denominations as the Representatives may direct by notice in writing to the Company given at or prior to 12:00 Noon, New York time, on the second full business day preceding an Option Closing Date) against payment of the aggregate Purchase Price therefor by same-day funds by wire transfer to an account at a bank designated by the Company, all at the offices of Wilson Sonsini Goodrich & Rosati, a Professional Corporation, 650 Page Mill Road, Palo Alto, California. Delivery of the Optional Stock will be made by credit through full fast transfer to accounts at the Depository Trust Company. Time shall be of the essence, and delivery at the time and place specified pursuant to this Agreement is a further condition of the obligations of each Underwriter hereunder. The Company shall make the certificates for the Optional Stock available to the Representatives for examination on behalf of the Underwriters in Palo Alto, California not later than 7:00 A.M., California time, on the business day preceding an Option Closing Date. Any Option Closing Date and the location of delivery of, and the form of payment for, the Optional Stock may be varied by agreement among the Company and SG Cowen.

The several Underwriters propose to offer the Stock for sale upon the terms and conditions set forth in the Prospectus.

(4) (I) FURTHER AGREEMENTS OF THE COMPANY. The Company agrees with the several Underwriters that:

(a) The Company will prepare the Rule 462(b) Registration Statement, if necessary, in a form approved by the Representatives and file such Rule 462(b) Registration Statement with the Commission on or after the date hereof; prepare the Prospectus in a form approved by the Representatives and file such Prospectus pursuant to Rule 424(b) under the Securities Act not later than the second business day following the execution and delivery of this Agreement; make no further amendment or any supplement to the Registration Statements or to the Prospectus prior to the Option Closing Date to which the Representatives shall reasonably object by notice to the Company after a reasonable period to review; advise the Representatives, promptly after it receives notice thereof, of the time when any amendment to either Registration Statement has been filed or becomes effective or any supplement to the Prospectus or any amended Prospectus has been filed and to furnish the Representatives with copies thereof; file promptly all reports and any definitive proxy or information statements required to be filed by the Company with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of the Prospectus and for so long as the delivery of a prospectus is required in connection with the offering or sale of the Stock; advise the Representatives, promptly after it receives notice thereof, of the issuance by the Commission of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or the Prospectus, of the suspension of the qualification of the Stock for offering or sale in any jurisdiction, of the initiation or threatening of any proceeding for any such purpose, or of any request by the Commission for the amending or supplementing of the Registration Statements or the Prospectus or for additional information; and, in the event of the issuance of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or the Prospectus or suspending any such qualification, use promptly its best efforts to obtain its withdrawal.

(b) If at any time prior to the expiration of nine months after the effective date of the Initial Registration Statement when a prospectus relating to the Stock is required to be delivered any event occurs as a result of which the Prospectus as then amended or supplemented would include any untrue statement of a material fact, or omit to state any material fact necessary to make the statements therein, in light of the circumstances under which they were made, not misleading, or if it is necessary at any time to amend the Prospectus or to file under the Exchange Act any document incorporated by reference in the Prospectus to comply with the Securities Act or the

Exchange Act, the Company will promptly notify the Representatives thereof and upon their request will prepare an amended or supplemented Prospectus or make an appropriate filing pursuant to Section 13 or 14 of the Exchange Act which will correct such statement or omission or effect such compliance. The Company will furnish without charge to each Underwriter and to any dealer in securities as many copies as the Representatives may from time to time reasonably request of such amended or supplemented Prospectus; and in case any Underwriter is required to deliver a prospectus relating to the Stock nine months or more after the effective date of the Initial Registration Statement, the Company upon the request of the Representatives and at the expense of such Underwriter will prepare promptly an amended or supplemented Prospectus as may be necessary to permit compliance with the requirements of Section 10(a)(3) of the Securities Act.

(c) To furnish promptly to each of SG Cowen and Deutsche Bank a signed copy of each of the Registration Statements as originally filed with the Commission, and each amendment thereto filed with the Commission, including all consents and exhibits filed therewith.

(d) To deliver promptly to SG Cowen Securities Corporation in New York City such number of the following documents as the Representatives shall reasonably request: (i) conformed copies of the Registration Statements as originally filed with the Commission and each amendment thereto (in each case excluding exhibits), (ii) each Preliminary Prospectus, and (iii) the Prospectus (not later than 9:00 A.M., New York time, of the second business day following the execution and delivery of this Agreement, or such later date agreed to by the Company and the Representatives) and any amended or supplemented Prospectus (not later than 9:00 A.M., New York time, on the second business day following the date of such amendment or supplement or such later date agreed to by the Company and SG Cowen Securities Corporation) and (iv) any document incorporated by reference in the Prospectus (excluding exhibits thereto).

(e) To make generally available to its stockholders as soon as practicable, but in any event not later than eighteen months after the effective date of the Registration Statement (as defined in Rule 158(c) under the Securities Act), an earnings statement of the Company and its subsidiaries (which need not be audited) complying with Section 11(a) of the Securities Act and the Rules and Regulations (including, at the option of the Company, Rule 158).

(f) The Company will promptly take from time to time such actions as the Representatives may reasonably request to qualify the Stock for offering and sale under the securities or Blue Sky laws of such jurisdictions as the Representatives may designate in writing to the Company and to continue such qualifications in effect for so long as required for the distribution of the Stock; provided that the Company and its subsidiaries shall not be obligated to qualify as foreign corporations in any jurisdiction in which they are not so qualified or to file a general consent to service of process in any jurisdiction.

(g) During the period of five years from the date hereof, upon request the Company will deliver to the Representatives and to each of the other Underwriters, (i) as soon as they are available, copies of all reports or other communications furnished to stockholders and (ii) as soon as they are available, copies of any reports and financial statements furnished or filed with the Commission pursuant to the Exchange Act or any national securities exchange or automatic quotation system on which the Stock is listed or quoted.

(h) The Company will not directly or indirectly offer, sell, assign, transfer, pledge, contract to sell, or otherwise dispose of any shares of Common Stock or securities convertible into or exercisable or exchangeable for Common Stock for a period of 90 days from the date of the Prospectus without the prior written consent of Deutsche Bank and SG Cowen other than (i) the

Company’s sale of the Stock hereunder, (ii) the issuance of options to purchase shares of Common Stock in the ordinary course of business and pursuant to the stock option plans and the employee stock purchase plan described in the Prospectus or the documents incorporated by reference therein (collectively, the “Plans”) (not to exceed the shares available for issuance or grant under such plans as set forth in the Prospectus) and (ii) the issuance of shares of Common Stock upon exercise of options to purchase shares of Common Stock outstanding as of the date of this Agreement or issued in the ordinary course of business and pursuant to the Plans. The Company will cause all of its executive officers and directors to furnish to the Representatives, prior to the First Closing Date, a letter, substantially in the form of Exhibit I hereto, pursuant to which each such person shall agree not to directly or indirectly offer, sell, assign, transfer, pledge, contract to sell, or otherwise dispose of any shares of Common Stock or securities convertible into or exercisable or exchangeable for Common Stock for a period of 90 days from the date of the Prospectus, without the prior written consent of Deutsche Bank and SG Cowen.

(i) The Company will supply the Representatives with copies of all correspondence to and from, and all documents issued to and by, the Commission in connection with the registration of the Stock under the Securities Act.

(j) Prior to each of the Closing Dates, the Company will furnish to the Representatives, as soon as they have been prepared, copies of any unaudited interim consolidated financial statements of the Company for any periods subsequent to the periods covered by the financial statements appearing in the Registration Statement and the Prospectus.

(k) Prior to the initial Closing Date, the Company will not issue any press release or other communication directly or indirectly or hold any press conference with respect to the Company, its condition, financial or otherwise, or earnings, business affairs or business prospects (except for routine oral marketing communications in the ordinary course of business and consistent with the past practices of the Company and of which the Representatives are notified), without the prior written consent of the Representatives, unless in the judgment of the Company and its counsel, and after notification to the Representatives, such press release or communication is required by law.

(l) In connection with the offering of the Stock, until SG Cowen shall have notified the Company of the completion of the resale of the Stock, the Company will not, and will cause its affiliated purchasers (as defined in Regulation M under the Exchange Act) not to, either alone or with one or more other persons, bid for or purchase, for any account in which it or any of its affiliated purchasers has a beneficial interest, any Stock, or attempt to induce any person to purchase any Stock; and not to, and to cause its affiliated purchasers not to, make bids or purchase for the purpose of creating actual, or apparent, active trading in or of raising the price of the Stock.

(m) The Company shall comply in all material respects with all applicable provisions of the Sarbanes-Oxley Act in effect from time to time.

(n) The Company will apply the net proceeds from the sale of the Stock as set forth in the Prospectus under the heading “Use of Proceeds”.

(II) FURTHER AGREEMENTS OF THE SELLING STOCKHOLDERS. Each Selling Stockholder, severally and not jointly, agrees with the several Underwriters that:

(a) The obligations of such Selling Stockholder hereunder shall not be terminated by operation of law, whether by the death or incapacity of such Selling Stockholder, or any other

event, that if such Selling Stockholder should die or become incapacitated or any other event occurs, before the delivery of the Firm Stock hereunder, certificates for the Firm Stock to be sold by such Selling Stockholder shall be delivered on behalf of such Selling Stockholder in accordance with the terms and conditions of this Agreement.

(b) Such Selling Stockholder will deliver to SG Cowen on or prior to the First Closing Date a properly completed and executed United States Treasury Department Form W-8 (if the Selling Stockholder is a non-United States person) or Form W-9 (if the Selling Stockholder is a United States person) or such other applicable form or statement specified by Treasury Department regulations in lieu thereof.

(c) Such Selling Stockholder will not take, directly or indirectly, any action designed or intended to stabilize or manipulate the price of any security of the Company, or that might reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company.

(d) Such Selling Stockholder will enter into the agreement in the form set forth in Exhibit I hereto.

5. PAYMENT OF EXPENSES. The Company agrees with the Underwriter to pay: (a) the costs incident to the authorization, issuance, sale, preparation and delivery of the Stock and any taxes payable in that connection; (b) the costs incident to the Registration of the Stock under the Securities Act; (c) the costs incident to the preparation, printing and distribution of the Registration Statement, Preliminary Prospectus, Prospectus any amendments and exhibits thereto or any document incorporated by reference therein, and the costs of printing and reproducing the “Agreement Among Underwriters” between the Representatives and the Underwriters, the Master Selected Dealers’ Agreement, the Underwriters’ Questionnaire and this Agreement by mail, telex or other means of communications; (d) the fees and expenses (including related fees and expenses of counsel for the Underwriters) incurred in connection with filings made with the National Association of Securities Dealers; (e) any applicable listing or other fees; (f) the fees and expenses of qualifying the Stock under the securities laws of the several jurisdictions as provided in Section 4(I)(f) and of preparing and printing the Blue Sky Memoranda and Legal Investment Surveys (including related fees and expenses of counsel to the Underwriters); (g) all fees and expenses of the registrar and transfer agent of the Stock; (h) all fees and expenses incident to the performance of the Selling Stockholder’s obligations under this Agreement which are not otherwise specifically provided for herein, including but not limited to any fees and expenses of counsel for such Selling Stockholder and all expenses and taxes incident to the sale and delivery of the Firm Stock to be sold by such Selling Stockholder to the Underwriters hereunder, and (i) all other costs and expenses incident to the performance of the obligations of the Company under this Agreement (including, without limitation, the fees and expenses of the Company’s counsel and the Company’s independent accountants); provided that, except as otherwise expressly provided in this Section 5 and in Section 9, the Underwriters shall pay their own costs and expenses, including the fees and expenses of their counsel, any transfer taxes on the Stock which they may sell and the expenses of advertising any offering of the Stock made by the Underwriters.

6. CONDITIONS OF UNDERWRITERS’ OBLIGATIONS. The respective obligations of the several Underwriters hereunder are subject to the accuracy, when made and on each of the Closing Dates (as applicable), of the respective representations and warranties of the Company and the Selling Stockholders contained herein, to the accuracy of the respective statements of the Company and the Selling Stockholders made in any certificates delivered pursuant to the provisions hereof, to the performance by the Company and the Selling Stockholders of their respective obligations hereunder, and to each of the following additional terms and conditions:

(a) No stop order suspending the effectiveness of either of the Registration Statements shall have been issued and no proceedings for that purpose shall have been initiated or threatened by the Commission, and any request for additional information on the part of the Commission (to be included in the Registration Statements or the Prospectus or otherwise) shall have been complied with to the reasonable satisfaction of the Representatives. The Rule 462(b) Registration Statement, if any, and the Prospectus shall have been timely filed with the Commission in accordance with Section 4(I)(a).

(b) None of the Underwriters shall have discovered on or prior to the applicable Closing Date that the Registration Statements or the Prospectus or any amendment or supplement thereto contains an untrue statement of a fact which, in the opinion of counsel for the Underwriters, is material or omits to state any fact which, in the opinion of such counsel, is material and is required to be stated therein or is necessary to make the statements therein not misleading.

(c) All corporate proceedings and other legal matters incident to the authorization, form and validity of each of this Agreement, the Stock, the Registration Statements and the Prospectus and all other legal matters relating to this Agreement and the transactions contemplated hereby shall be reasonably satisfactory in all material respects to counsel for the Underwriters, and the Company and the Selling Stockholders shall have furnished to such counsel all documents and information that they may reasonably request to enable them to pass upon such matters.

(d) Wilson Sonsini Goodrich & Rosati, a Professional Corporation, shall have furnished to the Representatives such counsel’s written opinion or opinions, as counsel to the Company and the Selling Stockholders, addressed to the Underwriters and dated each Closing Date, in the form attached hereto as Exhibit II.

(e) The Representatives shall have received from Skadden, Arps, Slate, Meagher & Flom LLP, counsel for the Underwriters, such opinion or opinions, dated each Closing Date, with respect to such matters as the Underwriters may reasonably require, and the Company shall have furnished to such counsel such documents as they reasonably request for enabling them to pass upon such matters.

(f) At the time of the execution of this Agreement, the Representatives shall have received from Ernst & Young LLP a letter, addressed to the Underwriters and dated such date, in form and substance satisfactory to the Representatives (i) confirming that they are independent certified public accountants with respect to the Company and its subsidiaries within the meaning of the Securities Act and the Rules and Regulations and (ii) stating the conclusions and findings of such firm with respect to the financial statements and certain financial information contained or incorporated by reference in the Prospectus.

(g) On each Closing Date, the Representatives shall have received a letter (the “bring-down letter”) from Ernst & Young LLP addressed to the Underwriters and dated such Closing Date confirming, as of the date of the bring-down letter (or, with respect to matters involving changes or developments since the respective dates as of which specified financial information is given in the Prospectus as of a date not more than three business days prior to the date of the bring-down letter), the conclusions and findings of such firm with respect to the financial information and other matters covered by its letter delivered to the Representatives concurrently with the execution of this Agreement pursuant to Section 6(g).

(h) The Company shall have furnished to the Representatives a certificate, dated such Closing Date, of its Chief Executive Officer and its Chief Financial Officer stating on behalf of the Company that (i) since the effective date of the Initial Registration Statement no event has

occurred which should have been set forth in a supplement or amendment to the Registration Statements or the Prospectus, (ii) the representations and warranties of the Company in this Agreement are true and correct and the Company has complied with all agreements and satisfied all conditions on its part to be performed or satisfied hereunder at or prior to the Closing Date, and (iii) subsequent to the date of the most recent financial statements included or incorporated by reference in the Prospectus, there has been no change in the financial position or results of operation of the Company and its subsidiaries, or any change, or any development including a prospective change, in each of the instances in this clause (iii), that could reasonably be expected to have a Material Adverse Effect on the condition (financial or otherwise), results of operations, business or prospects of the Company and its subsidiaries taken as a whole, except as set forth in the Prospectus.

(i) Each Selling Stockholder shall have furnished to the Representatives on each Closing Date a certificate, dated such date, signed by, or on behalf of, the Selling Stockholder stating that the representations, warranties and agreements of the Selling Stockholder contained herein are true and correct as of the First Closing Date and that the Selling Stockholder has complied with all agreements contained herein to be performed by the Selling Stockholder at or prior to the First Closing Date.

(j) (i) Neither the Company nor any of its subsidiaries shall have sustained since the date of the latest audited financial statements included or incorporated by reference in the Prospectus any loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, otherwise than as set forth or contemplated in the Prospectus, and (ii) since such date there shall not have been any change in the capital stock or long-term debt of the Company (other than the grant or exercise of options under the Plans) or any of its subsidiaries or any change, or any development involving a prospective change, in or affecting the business, general affairs, management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, otherwise than as set forth or contemplated in the Prospectus, the effect of which, in any such case described in clause (i) or (ii), is, in the judgment of the Representatives, so material and adverse as to make it impracticable or inadvisable to proceed with the sale or delivery of the Stock on the terms and in the manner contemplated in the Prospectus.

(k) No action shall have been taken and no statute, rule, regulation or order shall have been enacted, adopted or issued by any governmental agency or body which would, as of the Closing Date, prevent the issuance or sale of the Stock or materially and adversely affect or potentially materially and adversely affect the business or operations of the Company; and no injunction, restraining order or order of any other nature by any federal or state court of competent jurisdiction shall have been issued as of the Closing Date which would prevent the issuance or sale of the Stock or materially and adversely affect or potentially materially and adversely affect the business or operations of the Company.

(l) Subsequent to the execution and delivery of this Agreement (i) no downgrading shall have occurred in the Company’s corporate credit rating or the rating accorded the Company’s debt securities by any “nationally recognized statistical rating organization,” as that term is defined by the Commission for purposes of Rule 436(g)(2) of the Rules and Regulations and (ii) no such organization shall have publicly announced that it has under surveillance or review (other than an announcement with positive implications of a possible upgrading), its rating of any of the Company’s debt securities.

(m) Subsequent to the execution and delivery of this Agreement there shall not have occurred any of the following: (i) trading in securities generally on the New York Stock Exchange or the

American Stock Exchange or in the over-the-counter market, or trading in any securities of the Company on any exchange or in the over-the-counter market, shall have been suspended or minimum or maximum prices or maximum range for prices shall have been established on any such exchange or market by the Commission, by such exchange or by any other regulatory body or governmental authority having jurisdiction; (ii) a banking moratorium shall have been declared by Federal or state authorities, or a material disruption has occurred in commercial banking or securities settlement or clearance services in the United States; (iii) (A) a declaration of a material national emergency or a declaration of war by the United States, or a material outbreak or escalation of hostilities between the United States and any foreign power, (B) an outbreak or material escalation of any other insurrection or armed conflict, or act of terrorism involving the United States, or any other material national or international crisis, calamity or emergency, (C) a “Red” terrorist threat condition, announced by the Homeland Security Advisory System or similar agency in the United States, (D) any material discharge, detonation, explosion or use against any person or entity or nation anywhere in the world of any weapon of mass destruction has occurred or (iv) there shall have occurred such a material adverse change in general economic, political or financial conditions (or the effect of international conditions on the financial markets in the United States shall be such) as to make it, in the sole judgment of the Representatives, impracticable or inadvisable to proceed with the sale or delivery of the Stock on the terms and in the manner contemplated in the Prospectus.

(n) The Stock is listed or has been approved for listing subject to notice of issuance on the Nasdaq Stock Market’s National Market.

(o) Deutsche Bank and SG Cowen shall have received the written agreements, substantially in the form of Exhibit I hereto, of all of the executive officers and directors of the Company.

All opinions, letters, evidence and certificates mentioned above or elsewhere in this Agreement shall be deemed to be in compliance with the provisions hereof only if they are in form and substance reasonably satisfactory to counsel for the Underwriters, except that the opinion in (d) above shall be in the form attached as Exhibits II hereto.

(a) The Company and the Selling Stockholders shall indemnify and hold harmless each Underwriter, its officers, employees, representatives and agents and each person, if any, who controls any Underwriter within the meaning of the Securities Act (collectively the “Underwriter Indemnified Parties” and, each an “Underwriter Indemnified Party”) against any loss, claim, damage or liability, joint or several, or any action in respect thereof, to which that Underwriter Indemnified Party may become subject, under the Securities Act or otherwise, insofar as such loss, claim, damage, liability or action arises out of or is based upon (i) any untrue statement or alleged untrue statement of a material fact contained in the Preliminary Prospectus, either of the Registration Statements or the Prospectus or in any amendment or supplement thereto, (ii) the omission or alleged omission to state in any Preliminary Prospectus, either of the Registration Statements or the Prospectus or in any amendment or supplement thereto a material fact required to be stated therein or necessary to make the statements therein not misleading and shall reimburse each Underwriter Indemnified Party promptly upon demand for any legal or other expenses reasonably incurred by that Underwriter Indemnified Party in connection with investigating or preparing to defend or defending against or appearing as a third party witness in connection with any such loss, claim, damage, liability or action as such expenses are incurred or (iii) the breach of any representation or warranty of the Company or such Selling Stockholder, as the case may be, in Section 2 or 3 hereof; provided, however, that neither the Company nor any Selling Stockholder shall be liable in any such case to the extent that any such loss, claim,

damage, liability or action arises out of or is based upon (i) an untrue statement or alleged untrue statement in or an omission or alleged omission from the Preliminary Prospectus, either of the Registration Statements or the Prospectus or any amendment or supplement thereto in reliance upon and in conformity with written information furnished to the Company through the Representatives by or on behalf of any Underwriter specifically for use therein, which information the parties hereto agree is limited to the Underwriters’ Information (as defined in Section 16); provided, further, however, that the foregoing indemnification agreement with respect to the Preliminary Prospectus shall not inure to the benefit of any Underwriter from whom the person asserting any such loss, claim, damage or liability purchases Stock, or any officers, employees, representatives, agents or controlling persons of such Underwriter, if (i) a copy of the Prospectus (as then amended or supplemented) was required by law to be delivered to such person at or prior to the written confirmation of the sale of Stock to such person, (ii) a copy of the Prospectus (as then amended or supplemented) was not sent or given to such person by or on behalf of such Underwriter and such failure was not due to non-compliance by the Company with Section 4(I)(d), and (iii) delivery of the Prospectus (as so amended or supplemented) would have cured the defect giving rise to such loss, claim, damage or liability.

This indemnity agreement is not exclusive and will be in addition to any liability which the Company might otherwise have and shall not limit any rights or remedies which may otherwise be available at law or in equity to each Underwriter Indemnified Party. Notwithstanding anything to the contrary herein, the liability of any Selling Stockholder under this Agreement shall not exceed the net proceeds received by such Selling Stockholder in connection with the sale of such Selling Stockholder’s Firm Shares.

(b) Each Underwriter, severally and not jointly, shall indemnify and hold harmless the Company its officers, employees, representatives and agents, each of its directors and each person, if any, who controls the Company within the meaning of the Securities Act (collectively the “Company Indemnified Parties” and each a “Company Indemnified Party”) and the Selling Stockholders, their respective officers, employees, representatives and agents and each person, if any, who controls the Selling Stockholders within the meaning of the Securities Act (collectively, the “Selling Stockholder Indemnified Parties” and each a “Selling Stockholder Indemnified Party,”) against any loss, claim, damage or liability, joint or several, or any action in respect thereof, to which the Company Indemnified Parties or the Selling Stockholder Indemnified Parties may become subject, under the Securities Act or otherwise, insofar as such loss, claim, damage, liability or action arises out of or is based upon (i) any untrue statement or alleged untrue statement of a material fact contained in the Preliminary Prospectus, either of the Registration Statements or the Prospectus or in any amendment or supplement thereto or (ii) the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, but in each case only to the extent that the untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with written information furnished to the Company through the Representatives by or on behalf of that Underwriter specifically for use therein, and shall reimburse the Company Indemnified Parties and the Selling Stockholder Indemnified Parties for any legal or other expenses reasonably incurred by such parties in connection with investigating or preparing to defend or defending against or appearing as third party witness in connection with any such loss, claim, damage, liability or action as such expenses are incurred; provided that the parties hereto hereby agree that such written information provided by the Underwriters consists solely of the Underwriters’ Information (as defined in Section 16). This indemnity agreement is not exclusive and will be in addition to any liability which the Underwriters might otherwise have and shall not limit any rights or remedies which may otherwise be available at law or in equity to the Company Indemnified Parties and the Selling Stockholder Indemnified Parties.

(c) Promptly after receipt by an indemnified party under this Section 7 of notice of any claim or the commencement of any action, the indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under this Section 7, notify the indemnifying party in writing of the claim or the commencement of that action; provided, however, that the failure to notify the indemnifying party shall not relieve it from any liability which it may have under this Section 7 except to the extent it has been materially prejudiced by such failure; and, provided, further, that the failure to notify the indemnifying party shall not relieve it from any liability which it may have to an indemnified party otherwise than under this Section 7. If any such claim or action shall be brought against an indemnified party, and it shall notify the indemnifying party thereof, the indemnifying party shall be entitled to participate therein and, to the extent that it wishes, jointly with any other similarly notified indemnifying party, to assume the defense thereof with counsel selected by the indemnifying party which shall be reasonably satisfactory to the indemnified party. After notice from the indemnifying party to the indemnified party of its election to assume the defense of such claim or action, the indemnifying party shall not be liable to the indemnified party under this Section 7 for any legal or other expenses subsequently incurred by the indemnified party in connection with the defense thereof other than reasonable costs of investigation; provided, however, that any indemnified party shall have the right to employ separate counsel in any such action and to participate in the defense thereof but the fees and expenses of such counsel shall be at the expense of such indemnified party unless (i) the employment thereof has been specifically authorized by the indemnifying party in writing, (ii) such indemnified party shall have been advised by such counsel that there may be one or more legal defenses available to it which are different from or additional to those available to the indemnifying party and in the reasonable judgment of such counsel it is advisable for such indemnified party to employ separate counsel or (iii) the indemnifying party has failed to assume the defense of such action and employ counsel reasonably satisfactory to the indemnified party, in which case, if such indemnified party notifies the indemnifying party in writing that it elects to employ separate counsel at the expense of the indemnifying party, the indemnifying party shall not have the right to assume the defense of such action on behalf of such indemnified party, it being understood, however, that the indemnifying party shall not, in connection with any one such action or separate but substantially similar or related actions in the same jurisdiction arising out of the same general allegations or circumstances, be liable for the reasonable fees and expenses of more than one separate firm of attorneys at any time for all such indemnified parties, which firm shall be designated in writing by SG Cowen and Deutsche Bank if the indemnified parties under this Section 7 consist of any Underwriter Indemnified Party, or by the Company if the indemnified parties under this Section 7 consist of any Company Indemnified Parties or Selling Stockholder Indemnified Parties. Each indemnified party, as a condition of the indemnity agreements contained in Sections 7(a), 7(b) and 7(c), shall use all reasonable efforts to cooperate with the indemnifying party in the defense of any such action or claim. Subject to the provisions of Section 7(f) below, no indemnifying party shall be liable for any settlement of any such action effected without its written consent (which consent shall not be unreasonably withheld), but if settled with its written consent or if there be a final judgment for the plaintiff in any such action, the indemnifying party agrees to indemnify and hold harmless any indemnified party from and against any loss or liability by reason of such settlement or judgment in accordance with the provisions hereof.

(d) If at any time an indemnified party shall have requested that an indemnifying party reimburse the indemnified party for fees and expenses of counsel, such indemnifying party agrees that it shall be liable for any settlement of the nature contemplated by this Section 7 effected without its written consent if (i) such settlement is entered into more than 90 days after receipt by such indemnifying party of the request for reimbursement, (ii) such indemnifying party shall have received notice of the terms of such settlement at least 60 days prior to such settlement being

entered into and (iii) such indemnifying party shall not have reimbursed such indemnified party in accordance with such request prior to the date of such settlement.

(e) If the indemnification provided for in this Section 7 is unavailable or insufficient to hold harmless an indemnified party under Section 7(a), 7(b) or 7(c), then each indemnifying party shall, in lieu of indemnifying such indemnified party, contribute to the amount paid or payable by such indemnified party as a result of such loss, claim, damage or liability, or action in respect thereof, (i) in such proportion as shall be appropriate to reflect the relative benefits received by the Company, the Selling Stockholders and the Underwriters from the offering of the Stock or (ii) if the allocation provided by clause (i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Company, the Selling Stockholders and the Underwriters with respect to the statements or omissions which resulted in such loss, claim, damage or liability, or action in respect thereof, as well as any other relevant equitable considerations. The relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other with respect to such offering shall be deemed to be in the same proportion as the total net proceeds from the offering of the Stock purchased under this Agreement (before deducting expenses) received by the Company and the Selling Stockholders bear to the total underwriting discounts and commissions received by the Underwriters with respect to the Stock purchased under this Agreement, in each case as set forth in the table on the cover page of the Prospectus. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company or the Selling Stockholders on the one hand or the Underwriters on the other, the intent of the parties and their relative knowledge, access to information and opportunity to correct or prevent such untrue statement or omission; provided that the parties hereto agree that the written information furnished to the Company through the Representatives by or on behalf of the Underwriters for use in any Preliminary Prospectus, either of the Registration Statements or the Prospectus consists solely of the Underwriters’ Information (as defined in Section 16). The Company, the Selling Stockholders and the Underwriters agree that it would not be just and equitable if contributions pursuant to this Section 7(f) were to be determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take into account the equitable considerations referred to herein. The amount paid or payable by an indemnified party as a result of the loss, claim, damage or liability, or action in respect thereof, referred to above in this Section 7(f) shall be deemed to include, for purposes of this Section 7(f), any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 7(f), no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Stock underwritten by it and distributed to the public were offered to the public less the amount of any damages which such Underwriter has otherwise paid or become liable to pay by reason of any untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations to contribute as provided in this Section 7(f) are several in proportion to their respective underwriting obligations and not joint. Notwithstanding anything herein to the contrary, each Underwriter Indemnified Party agrees not to initiate any claim for indemnification, contribution, advancement of expenses or other matter from the Selling Stockholders (other than a breach of a representation or warranty of such Selling Stockholder in Section 2(II)(a), (b) or (d) hereof) unless such Underwriter Indemnified Party shall have first brought such claim against the Company and Company has not satisfied such claim within 180 days from the date of such request.

8. TERMINATION. The obligations of the Underwriters hereunder may be terminated by Deutsche Bank or SG Cowen, in its absolute discretion by notice given to and received by the Company prior to delivery of and payment for the Firm Stock if, prior to that time, any of the events described in Sections 6(k), 6(m) or 6(n) have occurred or if the Underwriters shall decline to purchase the Stock for any reason permitted under this Agreement.

9. REIMBURSEMENT OF UNDERWRITERS’ EXPENSES. If (a) this Agreement shall have been terminated pursuant to Section 8 or 10, (b) the Company fails to tender any of the Company Firm Stock or Optional Stock for delivery to the Underwriters for any reason not permitted under this Agreement, (c) the Selling Stockholders collectively fail to tender all of the Selling Stockholder Firm Stock for delivery to the Underwriters for any reason not permitted under this Agreement or (d) the Underwriters shall decline to purchase the Stock for any reason permitted under this Agreement, the Company shall reimburse the Underwriters for the fees and expenses of their counsel and for such other out-of-pocket expenses as shall have been reasonably incurred by them in connection with this Agreement and the proposed purchase of the Stock, and upon demand the Company shall pay the full amount thereof to the Underwriters. If this Agreement is terminated pursuant to Section 8 or 10 by reason of the default of one or more Underwriters, the Company shall not be obligated to reimburse any defaulting Underwriter on account of those expenses; provided, however, that the foregoing shall not limit any reimbursement obligation of the Company to any non-defaulting Underwriter under this Section 9.

10. SUBSTITUTION OF UNDERWRITERS. If any Underwriter or Underwriters shall default in its or their obligations to purchase shares of Stock hereunder and the aggregate number of shares which such defaulting Underwriter or Underwriters agreed but failed to purchase does not exceed ten percent (10%) of the total number of shares of Stock underwritten, the other Underwriters shall be obligated severally, in proportion to their respective commitments hereunder, to purchase the shares of Stock which such defaulting Underwriter or Underwriters agreed but failed to purchase. If any Underwriter or Underwriters shall so default and the aggregate number of shares with respect to which such default or defaults occur is more than ten percent (10%) of the total number of shares of Stock and arrangements satisfactory to the Representatives and the Company for the purchase of such shares by other persons are not made within forty-eight (48) hours after such default, this Agreement shall terminate.

If the remaining Underwriters or substituted Underwriters are required hereby or agree to take up all or part of the shares of Stock of a defaulting Underwriter or Underwriters as provided in this Section 10, (i) the Company shall have the right to postpone the applicable Closing Date for a period of not more than five (5) full business days in order that the Company may effect whatever changes may thereby be made necessary in the Registration Statements or the Prospectus, or in any other documents or arrangements, and the Company agrees promptly to file any amendments to the Registration Statements or supplements to the Prospectus which may thereby be made necessary, and (ii) the respective numbers of shares to be purchased by the remaining Underwriters or substituted Underwriters shall be taken as the basis of their underwriting obligation for all purposes of this Agreement. Nothing herein contained shall relieve any defaulting Underwriter of its liability to the Company, the Selling Stockholders or the other Underwriters for damages occasioned by its default hereunder. Any termination of this Agreement pursuant to this Section 10 shall be without liability on the part of any non-defaulting Underwriter, the Selling Stockholders or the Company, except expenses to be paid or reimbursed pursuant to Sections 5 and 9 and except the provisions of Section 7 shall not terminate and shall remain in effect.

11. SUCCESSORS; PERSONS ENTITLED TO BENEFIT OF AGREEMENT. This Agreement shall inure to the benefit of and be binding upon the several Underwriters, the Company and the Selling Stockholders and their respective successors. Nothing expressed or mentioned in this Agreement is intended or shall be construed to give any person other than the persons mentioned in the preceding sentence any legal or equitable right, remedy or claim under or in respect of this Agreement, or any provisions herein contained, this Agreement and all conditions and provisions hereof being intended to be and being for the

sole and exclusive benefit of such persons and for the benefit of no other person; except that the representations, warranties, covenants, agreements and indemnities of the Company and the Selling Stockholders contained in this Agreement shall also be for the benefit of the Underwriter Indemnified Parties, and the indemnities of the several Underwriters shall also be for the benefit of the Company Indemnified Parties and the Selling Stockholder Indemnified Parties. It is understood that the Underwriter’s responsibility to the Company is solely contractual in nature and the Underwriters do not owe the Company, or any other party, any fiduciary duty as a result of this Agreement. The term “successor” as used in this Section 11 shall not include any purchaser, as such purchaser, of any of the Stock from any of the several Underwriters.

12. SURVIVAL OF INDEMNITIES, REPRESENTATIONS, WARRANTIES, ETC. The respective indemnities, covenants, agreements, representations, warranties and other statements of the Company and the several Underwriters, as set forth in this Agreement or made by them respectively, pursuant to this Agreement, shall remain in full force and effect, regardless of any investigation made by or on behalf of any Underwriter, the Selling Stockholders, the Company or any person controlling any of them and shall survive delivery of and payment for the Stock.

13. NOTICES. All statements, requests, notices and agreements hereunder shall be in writing, and:

(a) if to the Underwriters, shall be delivered or sent by mail, telex or facsimile transmission to (i) Deutsche Bank Securities Inc., 60 Wall Street, 4^th Floor, New York, New York 10005; Attention: Syndicate Manager (Fax: 212-797-9344), with a copy to Deutsche Bank Securities Inc., 60 Wall Street, 36^th Floor, New York, New York 10005, Attention: General Counsel (Fax: 212-797-4564) and (ii) SG Cowen Securities Corporation Attention: Equity Capital Markets (Fax: 212-425-5801), with a copy to the same address, Attention: Legal Department (Fax: 212-278-7995);

(b) if to the Company or the Selling Stockholders, shall be delivered or sent by mail, telex or facsimile transmission to Integrated Silicon Solution, Inc., Attention: Chief Executive Officer and Chief Financial Officer (Fax: 408-969-7800);

Any such statements, requests, notices or agreements shall take effect at the time of receipt thereof. Any party to this Agreement may change its address for notice by sending to the other parties to this Agreement written notice of a new address for such purposes.

14. DEFINITION OF CERTAIN TERMS. For purposes of this Agreement, (a) “business day” means any day on which the New York Stock Exchange, Inc. is open for trading and (b) “subsidiary” shall mean the entities listed on Exhibit 21.1 to the Company’s annual report filed on Form 10-K for the fiscal year ended September 30, 2003.

15. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the laws of the State of New York.

16. UNDERWRITERS’ INFORMATION. The parties hereto acknowledge and agree that, for all purposes of this Agreement, the “Underwriters’ Information” consists solely of the following information in the Prospectus: (i) the last paragraph on the front cover page concerning the terms of the offering by the Underwriters; (ii) the table of underwriters participating in the offering in the first paragraph under the heading “Underwriting”; (iii) the statements concerning the Underwriters contained in the third paragraph under the heading “Underwriting” (which paragraph begins “The underwriters propose to offer the common stock”); (iv) the statements concerning the Underwriters regarding short sales contained in the tenth paragraph under the heading “Underwriting” (which paragraph begins “Short Sales involve”); and

(v) the statements contained in the final paragraph under the heading “Underwriting” (which paragraph begins “A prospectus in electronic format”).

17. AUTHORITY OF THE REPRESENTATIVES. In connection with this Agreement, you will act for and on behalf of the several Underwriters, and any action taken under this Agreement by the Representatives, will be binding on all the Underwriters.

18. PARTIAL UNENFORCEABILITY. The invalidity or unenforceability of any Section, paragraph or provision of this Agreement shall not affect the validity or enforceability of any other Section, paragraph or provision hereof. If any Section, paragraph or provision of this Agreement is for any reason determined to be invalid or unenforceable, there shall be deemed to be made such minor changes (and only such minor changes) as are necessary to make it valid and enforceable.

19. GENERAL. This Agreement constitutes the entire agreement of the parties to this Agreement and supersedes all prior written or oral and all contemporaneous oral agreements, understandings and negotiations with respect to the subject matter hereof. In this Agreement, the masculine, feminine and neuter genders and the singular and the plural include one another. The section headings in this Agreement are for the convenience of the parties only and will not affect the construction or interpretation of this Agreement. This Agreement may be amended or modified, and the observance of any term of this Agreement may be waived, only by a writing signed by the Company, the Selling Stockholders and the Representatives.

20. COUNTERPARTS. This Agreement may be signed in any number of counterparts, each of which shall be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument.

If the foregoing is in accordance with your understanding of the agreement between the Company, the Selling Stockholders and the several Underwriters, kindly indicate your acceptance in the space provided for that purpose below.


Very truly yours,

INTEGRATED SILICON SOLUTION, INC.

By:
Name:		Jimmy S.M. Lee
Title:		Chief Executive Officer

SELLING STOCKHOLDERS LISTED IN SCHEDULE B


Jimmy S.M. Lee


Gary L. Fischer

In order to induce Deutsche Bank Securities Inc. (“Deutsche Bank”), SG Cowen Securities Corporation (“SG Cowen”) and the several underwriters to enter in to a certain underwriting agreement (the “Underwriting Agreement”) with Integrated Silicon Solution, Inc., a Delaware corporation (the “Company”), with respect to the proposed public offering (the “Offering”) of shares of the Company’s Common Stock, par value $0.0001 per share (“Common Stock”), the undersigned hereby agrees that for a period from the date hereof until 90 days following the date of the final prospectus filed by the Company with the Securities and Exchange Commission in connection with the Offering (the “Lock-Up Period”), the undersigned will not, without the prior written consent of Deutsche Bank and SG Cowen, directly or indirectly, (i) offer, sell, assign, transfer, pledge, contract to sell, or otherwise dispose of, any shares of Common Stock (including, without limitation, Common Stock which may be deemed to be beneficially owned by the undersigned in accordance with the rules and regulations promulgated under the Securities Exchange Act of 1934, as the same may be amended or supplemented from time to time (such shares, the “Beneficially Owned Shares”)) or securities convertible into or exercisable or exchangeable in Common Stock, (ii) enter into any swap, hedge or similar agreement or arrangement that transfers, in whole or in part, the economic risk of ownership of the Beneficially Owned Shares or securities convertible into or exercisable or exchangeable in Common Stock or (iii) engage in any short selling of the Common Stock.

The foregoing paragraph shall not apply to (1) any transfer of shares of Common Stock or any security convertible into Common Stock (a) as a bona fide gift or gifts, (b) to any trust for the benefit of the undersigned or the undersigned’s immediate family, (c) by will or intestacy to the undersigned’s legal representative, heir or legatee, (d) if the undersigned is a partnership or corporation or similar entity, as a distribution to partners or stockholders of the undersigned or (e) acquired in the public market on or after the date of the final prospectus filed by the Company with the Securities and Exchange Commission in connection with the Offering, provided that in the case of clauses (a), (b) and (d) each donee, transferee or distributee shall execute and deliver to Deutsche Bank and SG Cowen a duplicate form of this letter; or (2) any sale of shares of Common Stock in the Offering pursuant to the Underwriting Agreement.

Anything contained herein to the contrary notwithstanding, any person to whom shares of Common Stock or Beneficially Owned Shares are transferred from the undersigned shall be bound by the terms of this Agreement.

In addition, the undersigned hereby waives, from the date hereof until the expiration of the Lock-Up Period, any and all rights, if any, to request or demand registration pursuant to the Securities Act of any shares of Common Stock that are registered in the name of the undersigned or that are Beneficially Owned Shares. In order to enable the aforesaid covenants to be enforced, the undersigned hereby consents to the placing of legends and/or stop-transfer orders with the transfer agent of the Common Stock with respect to any shares of Common Stock or Beneficially Owned Shares.

If the Offering does not close by , 2004, this Agreement shall terminate immediately upon such date and be of no further force and effect.




By:


Print Name

Title (if applicable)

Counsel to the Company and the Selling Stockholders shall have furnished to the Representatives such counsel’s written opinion, as counsel to the Company and the Selling Stockholders, addressed to the Underwriters and dated the Closing Date, in form and substance reasonably satisfactory to the Representatives, to the effect that:

Such counsel shall also have furnished to the Representatives a written statement, addressed to the Underwriters and dated the Closing Date, in form and substance satisfactory to the Representatives, to the effect that (x) such counsel has acted as counsel to the Company in connection with the preparation of the Registration Statements, (y) such counsel has participated in conferences with certain officers and employees of the Company, the Company’s auditors and the underwriters and counsel to the underwriters at which the contents of the Registration Statement were discussed, and based on such participation, but without any independent check or verification of any such information, such counsel has no reason to believe that (I) the Registration Statements, as of the respective effective dates, contained any untrue statement of a material fact or omitted to state any material fact required to be stated therein or necessary in order to make the statements therein not misleading, or that the Prospectus contains any untrue statement of a material fact or omits to state any material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading or (II) any document incorporated by reference in the Prospectus or any further amendment or supplement to any such incorporated document made by the Company prior to the Closing Date, when they became effective or were filed with the Commission, as the case may be, contained, in the case of a registration statement which became effective under

the Securities Act, any untrue statement of a material fact or omitted to state any material fact required to be stated therein or necessary in order to make the statements therein not misleading, or, in the case of other documents which were filed under the Exchange Act with the Commission, any untrue statement of a material fact or omitted to state any material fact necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading; it being understood that such counsel need express no opinion as to the financial statements or related schedules or other financial or statistical data contained in (i) the Registration Statement, (ii) the Prospectus or (iii) any document incorporated by reference therein.



By:		SG COWEN SECURITIES CORPORATION

By:

		Name: Title:

By:		DEUTSCHE BANK SECURITIES INC.

By:

		Name: Title:

By:

		Name: Title:


Name		Number of Shares of Firm Stock to be Purchased
Deutsche Bank Securities Inc.
SG Cowen Securities Corporation
Needham & Company, Inc.
WR Hambrecht+Co, LLC
ThinkEquity Partners LLC
Total		6,025,000


Selling Stockholders		Number of Shares of Firm Stock to Be Offered
Jimmy S.M. Lee		50,000
Gary L. Fischer		25,000
TOTAL		75,000