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 March 28, 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 March 28, 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



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