Fujitsu Adds Atheros Communications' Super AGŪ and Super GŪ Technology to its Notebooks in the North American Market

SUNNYVALE, Calif., July 19, 2004 — Atheros Communications, Inc. (Nasdaq: ATHR), a leading developer of advanced wireless LAN (WLAN) chipsets, today announced that Fujitsu Computer Systems, a wholly- owned subsidiary of Fujitsu Limited, is supporting Atheros' Super AGŪ and Super GŪ technology in six wireless-enabled notebook computer models and two Tablet PC models in the North American market.

These notebook and Tablet PC models incorporate Atheros 802.11a/b/g or 802.11b/g WLAN solutions. By providing an easy software upgrade for Atheros' Super AGŪ and Super G performance-boosting capabilities, Fujitsu is providing its customers with advanced wireless networking features that deliver the highest wireless performance available on the market today, as measured by end-user throughput and range.

Fujitsu is offering Atheros Super AGŪ technology in its LifeBook series of notebooks including the LifeBook S7010D, LifeBook N5010, LifeBook P7010D and LifeBook B3010D notebooks and in its Stylistic ST5010D and ST5011D Tablet PCs. The notebook models from Fujitsu that are Super G capable include the LifeBook P5020D, and the LifeBook S2020 notebooks. Atheros 802.11a/b/g and 802.11b/g wireless LAN chipsets provide optimal compatibility with 802.11b, 802.11g and 802.11a networks. All of these new Fujitsu models will have Atheros brand stickers to help users identify the feature set capabilities of the PC.

The wide array of complementary Super AGŪ and Super G networking products will enable Fujitsu customers to enjoy the performance advantages of the technology in their own home or business wireless networks.

"We're pleased that Fujitsu is enabling Atheros Super AGŪ and Super G technology in their notebook and Tablet PCs," said Colin Macnab, vice president of marketing and business development of Atheros Communications. "These technologies offer the best throughput allowing customers to meet the requirements for a wide range of mobile computing applications."

Atheros Super AGŪ and Super G technology offers a combination of innovative performance-enhancement features -- packet bursting, fast frames, data compression, and dynamic turbo -- that improve the throughput and range of wireless networking products. This feature set enables end-user throughput of more than 60 Mbps for typical data, up to three times higher than traditional 802.11g networks.

Fujitsu LifeBook notebooks and Stylistic Tablet PCs enabled with Atheros 802.11a/b/g technology are available now and can be purchased through the Fujitsu web site or select retail channels.

About Atheros Communications, Inc.

Atheros Communications is a leading developer of semiconductor system solutions for wireless communications products. Atheros combines its wireless systems expertise with high-performance radio frequency (RF), mixed signal and digital semiconductor design skills to provide highly integrated chipsets that are manufacturable on low-cost, standard complementary metal-oxide semiconductor (CMOS) processes. Atheros technology is being used by a broad base of leading customers, including personal computer and networking equipment manufacturers. For more information, visit www.atheros.com or send email to info@atheros.com.

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Atheros, the Atheros logo, Super G and Super AGŪ are trademarks of Atheros Communications, Inc. Fujitsu and LifeBook are registered trademarks of Fujitsu Limited. Stylistic is a registered trademark of Fujitsu Computer Systems. All other trademarks mentioned in this document are the property of their respective owners.

FORWARD-LOOKING STATEMENTS:

Except for the historical information contained herein, the matters set forth in this press release, including the features, performance and benefits of Atheros' products and technology and of Fujitsu's notebook and Tablet PCs, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially, including, but not limited to, the impact of competitive products and technological advances, manufacturing difficulties, difficulties in development of enhanced and new products, the companies' ability to market and ship in volume, and other risks detailed in Atheros' Prospectus dated February 11, 2004 as filed with the SEC and from time to time in Atheros' SEC filings. These forward-looking statements speak only as of the date hereof. Atheros disclaims any obligation to update these forward-looking statements.

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: Statements in this press release regarding Atheros Communications's business which are not historical facts are "forward-looking statements" that involve risks and uncertainties. For a discussion of such risks and uncertainties, which could cause actual results to differ from those contained in the forward-looking statements, see "Risk Factors" in the Company's Annual Report or Form 10-K for the most recently ended fiscal year.

For press and analyst inquiries contact: Cheryl Patstone, 408-773-5344, cheryl@atheros.com or Greg Wood, A&R Partners, 650-762-2838, gwood@arpartners.com.