I-O DATA Expands the Line-up of Atheros Super AG® and Super G® Enabled WLAN Equipment

SUNNYVALE, Calif., and TOKYO, Japan, June 30, 2004 – Atheros Communications, Inc. (Nasdaq: ATHR), a leading developer of advanced wireless LAN (WLAN) chipsets, today announced that the new wireless LAN access points announced today by I-O DATA Device Inc. are using Atheros Super AG® and Super G® enabled chipsets. Super AG® and Super G are Atheros wireless technologies that increase the speed of wireless communication. Atheros Super AG® and Super G technologies enable the users of    I-O DATA’s products to enjoy a faster wireless experience.

The new products utilize Atheros' third-generation AR5002AP-2X and AR5002AP-X, and fifth-generation AP5005AP-G chipsets. By utilizing frame bursting, wireless network optimization and real-time compression, Super AG® and Super G technologies support link rates of up to 54 Mbps for users in Japan, with typical end-user throughput of about 40 Mbps. In dynamic turbo mode, supported outside Japan, including in North America, Super AG® and Super G technologies enable up to 108 Mbps link rates and end-user throughput rates of more than 60 Mbps.

“I-O DATA offers a comprehensive wireless solution to the growing industry, answering the needs of various users by expanding our product line-up,” said Mr. Tohru Nagano, Vice President, Business Planning Department, Network Solution Division of I-O DATA. “By using Atheros technology, we are able to offer a faster and more stable wireless connection environment to our users.”

“We are very pleased to announce that I-O DATA has selected Atheros wireless technology. We will work to continue to develop wireless technology that will enhance the user’s wireless experience,” said Tomoki Ohsawa, General Manager of Atheros Communications K.K.

The following I-O DATA products were announced with Super AG® and Super G technologies:

・      AirPort HG  WN-APG/A – IEEE802.11a+g access point

・      AirPort HG  WN-AG/A – IEEE802.11a/g access point

・      AirPort HG  WN-AG/C – IEEE802.11a/g Ethernet converter

・      AirPort  WN-G54/A – IEEE802.11g access point

・      AirPort  WN-G54/C – IEEE802.11g Ethernet converter

 Please see http://www.iodata.jp/ for more detail on each product.

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, www.atheros.com or send email to info@atheros.com.

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Atheros, the Atheros logo, Super AG® and Super G are trademarks of Atheros Communications, Inc. All other trademarks mentioned in this document are the sole property of their respective owners. 

FORWARD-LOOKING STATEMENTS:

Except for the historical information contained herein, the matters set forth in this press release, including but not limited to the adoption of Atheros’ technology and chipsets by I-O DATA and the future relationship between Atheros and I-O DATA; and the features, performance, capabilities and benefits of Atheros’ products and technology, 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 I-O DATA’s ability to market their respective products; whether the market for wireless LAN technology will grow; and other risks detailed in Atheros’ Quarterly Report on Form 10-Q for the quarter ended March 31, 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.

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.