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   September  26,  2004  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   September  26,  2004  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