Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the Annual Report on Form 10-K of Synaptics Incorporated (the “Company”) for the year ended June 30, 2004 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Russell J. Knittel, Senior Vice President, Chief Financial Officer, Chief Administrative Officer, Secretary, and Treasurer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)	The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and
(2)	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Russell J. Knittel  

Russell J. Knittel 

Senior Vice President, Chief Financial Officer,
Chief Administrative Officer, Secretary, and
Treasurer
September 8, 2004