EXHIBIT 5.1

                                 March 15, 2002

Integrated Silicon Solution, Inc.
2231 Lawson Lane
Santa Clara, CA  95054-3311

        RE:  REGISTRATION STATEMENT ON FORM S-3

Ladies and Gentlemen:

        We have examined the Registration Statement on Form S-3 to be filed by
you with the Securities and Exchange Commission on or about the date hereof (the
"Registration Statement") in connection with the registration under the
Securities Act of 1933, as amended, of an aggregate of 438,281 shares of your
Common Stock (the "Shares"). All of the Shares are issued and outstanding and
may be offered for sale for the benefit of the selling stockholders named in the
Registration Statement. The Shares are to be sold from time to time as described
in the Registration Statement. As your legal counsel, we have examined the
proceedings taken by you in connection with the issuance of the Shares.

        It is our opinion that the Shares are legally and validly issued, fully
paid and nonassessable.

        We consent to the use of this opinion as an exhibit to the Registration
Statement and further consent to the use of our name wherever it appears in the
Registration Statement, including the prospectus constituting a part thereof,
and any amendments thereto.

                                            Very truly yours,

                                            WILSON SONSINI GOODRICH & ROSATI
                                            Professional Corporation

                                            /s/ WILSON SONSINI GOODRICH & ROSATI