Exhibit 99.1

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


I, Robert L. Bailey  hereby  certify,  in  accordance  with 18 U.S.C.  1350,  as
adopted  pursuant  to  Section  906 of the  Sarbanes-Oxley  Act of  2002,  in my
capacity as an officer of PMC-Sierra,  Inc. ("PMC"), that, to my knowledge,  the
Quarterly  Report of PMC on Form 10-Q for the period ended March 30, 2003, fully
complies with the requirements of Section 13 (a) of the Securities  Exchange Act
of 1934 and that the information  contained in such report fairly  presents,  in
all material respects, the financial condition and results of operation of PMC.

Date:    May 12, 2003                     By: /s/ Robert L. Bailey
     --------------------                 --------------------------------------
                                          Robert L. Bailey
                                          President and Chief Executive Officer