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,  Lothar  Maier,  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  second  quarter
ended January 2, 2005 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/ Lothar Maier
                                         ---------------------------------------
                                         Name:  Lothar Maier
                                         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  second  quarter
ended January 2, 2005 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