Atheros Communications' Super AGŪ and Super GŪ Technologies Gain Widespread Acceptance in Japan

17 Leading Japanese wireless LAN vendors and PC manufacturers use the technology

Many have joined the Atheros Total 802.11Ū Branding Program

The Super AGŪ/G logo is being placed on PCs and wireless LAN equipment that use the technology and are offered by companies who participate in the branding program. The logos are also being included on product spec sheets, brochures and websites to highlight the wireless technology capability. With Super logos, end users are able to easily identify and select products that offer Super AGŪ/G interoperability across different brands.

"The Atheros Total 802.11 Branding Program, which began in September 2003, has been widely accepted by our customers and has achieved strong momentum in the market," said Tomoki Ohsawa, General Manager of Atheros Communications K.K. "With the Super AGŪ and Super G brands, we are enabling our customers to easily convey to users the high-performance capabilities of their Atheros- based wireless LAN products."

Atheros expects its Super AGŪ and Super G technologies will be adopted into more PCs and wireless LAN products in the future. In addition, home digital products such as TVs and video game consoles, as well as mobile phones and telematics have started to deploy wireless LAN features, and Atheros also expects its technology to be used in these fields.

About Super G and Super AGŪ Technology

Atheros Super G and Super AGŪ technology employs innovative performance- enhancement features -- including packet bursting, fast frames, and data compression -- that improve the throughput and range of wireless networking products. The technology delivers user link rates up to two times faster than standard 802.11g or 802.11a/g products while preserving full compatibility with standard IEEE 802.11g or 802.11a/g networks. Super G and Super AGŪ support up to 54 Mbps data rates for users in Japan, with typical end-user throughputs as high as 40 Mbps. Outside Japan, with a dynamic turbo mode activated, the technology can achieve throughputs of more than 60 Mbps for typical data. This is the highest throughput performance available on the market today. Atheros chipsets with Super G and Super AGŪ technologies have shipped since the second quarter of 2003.

Note to Editors

Vendors that have shipped products providing Super AGŪ/Super G technologies include:

    -- Contec*

    -- Corega*

    -- Elecom*

    -- Fujitsu*

    -- Icom*

    -- I-O Data*

    -- NEC*

    -- NEC Access Technica*

    -- NETGEAR Japan*

    -- NTT East

    -- NTT West

    -- NTT-ME*

    -- Omron*

    -- Planex Communications*

    -- Sony*

    -- Sumitomo Electronics

    -- Toshiba*

(*Marked companies participate in the Atheros Total 802.11 Super AGŪ and Super G Branding Program.)

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, 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 AGŪ, Super G, and Total 802.11 are trademarks of Atheros Communications, Inc. 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 adoption of Atheros' products and technologies by Japanese wireless LAN equipment vendors and PC manufacturers; the expected adoption of Atheros' technologies into more PCs, wireless LAN products, home digital products, mobile telephones and telematics, and the participation of Atheros' customers in the Atheros logo branding program, 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, Atheros' and its customers ability to market their products and ship in volume, the ability of Atheros and its customers to continue to participate in the branding program on mutually acceptable terms, and other risks detailed in Atheros' Quarterly Report on Form 10-Q for the quarter ended March 31, 2004, filed with the SEC, and in other reports filed by Atheros with the SEC from time to time. 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.