EXHIBIT 32.2

                    CERTIFICATION OF 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, Bryon Look, 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
LSI Logic Corporation on Form 10-Q for the quarterly period ended September
28,2003, 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 Form 10-Q
fairly presents, in all material respects, the financial condition and results
of operations of LSI Logic Corporation.

                                       By: /s/ Bryon Look
                                           -------------------------------------
                                       Name:  Bryon Look
                                       Title: Executive Vice President & Chief
                                       Financial Officer