UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 15

CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g)

OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION ON DUTY TO FILE REPORTS

UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.

Commission File Number: 0-19299

Integrated Circuit Systems, Inc.

(Exact name of registrant as specified in its charter)

2435 Boulevard of the Generals, Norristown, Pennsylvania 19403, (610) 630-5300

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Common Stock, par value $.01 per share

(Title of each class of securities covered by this Form)

None

(Titles of all other classes of securities for which a duty to file reports under section 13(a) or 15(d) remains)

Please place an X in the box(es) to designate the appropriate rule provision(s) relied upon to terminate or suspend the duty to file reports:

Rule 12g-4(a)(1)(i)	x	Rule 12h-3(b)(1)(i)	x
Rule 12g-4(a)(1)(ii)	¨	Rule 12h-3(b)(1)(ii)	¨
Rule 12g-4(a)(2)(i)	¨	Rule 12h-3(b)(2)(i)	¨
Rule 12g-4(a)(2)(ii)	¨	Rule 12h-3(b)(2)(ii)	¨
		Rule 15d-6	¨

Approximate number of holders of record as of the certification or notice date: One

Pursuant to the requirements of the Securities Exchange Act of 1934, Colonial Merger Sub I, Inc. (successor by merger to Integrated Circuit Systems, Inc.) has caused this certification/notice to be signed on its behalf by the undersigned duly authorized person.

Date:	September 16, 2005	By:	/s/ Clyde R. Hosein
			Clyde R. Hosein Vice President and Chief Financial Officer