EXHIBIT 99.1

      CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
                                   PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002



I, Jimmy S.M. Lee, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly
Report of Integrated Silicon Solution, Inc. on Form 10-Q for the quarterly
period ended March 31, 2003 fully complies with the requirements of Section
13(a) or 15(d) of the Securities Exchange Act of 1934 and that information
contained in such Report on Form 10Q fairly presents in all material respects
the financial condition and results of operations of Integrated Silicon Solution
Inc.



                       By: /s/ Jimmy S.M. Lee
                          -------------------


                          Jimmy S.M. Lee
                          Chairman of the Board and Chief Executive Officer
                          May 15, 2003



I, Gary L. Fischer, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly
Report of Integrated Silicon Solution, Inc. on Form 10-Q for the quarterly
period ended March 31, 2003 fully complies with the requirements of Section
13(a) or 15(d) of the Securities Exchange Act of 1934 and that information
contained in such Report on Form 10Q fairly presents in all material respects
the financial condition and results of operations of Integrated Silicon Solution
Inc.



                       By: /s/ Gary L. Fischer
                          -------------------


                           Gary L. Fischer
                           President, Chief Operating Officer and
                           Chief Financial Officer
                           May 15, 2003