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 Quarterly Report of Linear Technology Corporation on Form 10-Q
         for the fiscal  quarter ended December 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 Quarterly Report on Form
         10-Q 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 Quarterly Report of Linear Technology  Corporation on Form 10-Q for
         the fiscal  quarter  ended  December 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 Quarterly Report on Form
         10-Q 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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