Exhibit 32.1

      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, Robert H.  Swanson,  Jr.,  certify,  pursuant to 18 U.S.C.  Section  1350, as
adopted  pursuant to Section  906 of the  Sarbanes-Oxley  Act of 2002,  that the
Annual Report of Linear Technology  Corporation on Form 10-K for the fiscal year
ended June 29, 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 Annual  Report on Form 10-K fairly  presents in all  material  respects the
financial condition and results of operations of Linear Technology Corporation.


                                                  By: /s/ Robert H. Swanson, Jr.
                                                  ------------------------------
                                                  Name: Robert H. Swanson, Jr.
                                                  Title: Chief Executive Officer


I, Paul  Coghlan,  certify,  pursuant  to 18 U.S.C.  Section  1350,  as  adopted
pursuant  to  Section  906 of the  Sarbanes-Oxley  Act of 2002,  that the Annual
Report of Linear  Technology  Corporation on Form 10-K for the fiscal year ended
June 29, 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
Annual  Report  on Form  10-K  fairly  presents  in all  material  respects  the
financial condition and results of operations of Linear Technology Corporation.


                                                  By: /s/ Paul Coghlan
                                                  ------------------------------
                                                  Name: Paul Coghlan
                                                  Title: Chief Financial Officer

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