Supertex to Present at the Roth Capital Partners 18th Annual Growth Stock Conference

Supertex, Inc. (NASDAQ: SUPX), a recognized leader in high voltage analog and mixed signal integrated circuits (ICs), is pleased to announce that President and CEO, Dr. Henry C. Pao, will be presenting at the Roth Capital Partners 18th Annual Growth Stock Conference to be held at the St. Regis Monarch Beach Resort and Day Spa in Dana Point, CA., from February 20-22, 2006.

The audio portion of the Supertex presentation will be webcast live on Tuesday, February 21, 2006 at 9:00 A.M. (PST). The webcast for the Conference may be accessed by visiting http://www.wsw.com/webcast/roth7/supx/ at the time of the presentation. To listen to the webcast, viewers will need a multimedia computer (sound card and speakers) that has a web browser, Internet access, and a media player plug-in (Windows Media Player or RealNetworks Real Player).

About Supertex

Supertex, Inc. is a publicly held mixed signal semiconductor manufacturer, focused on high voltage interface products for use in the telecommunications, networking systems, medical, automotive and industrial electronics industries. Supertex product, corporate and financial information is readily available at www.supertex.com.

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