Expanding Performance and Possibilities with n February 15, 2006

2 Atheros Overview Worldwide leader in providing advanced wireless systems solutions Core competency: next-generation radios in silicon Financial: market valuation > $900M, 2005 annual sales $184M, well-positioned for growth Key technical differentiators n High-performance radio frequency, mixed signal and digital design n Expertise in developing WLAN solutions using standard digital CMOS n Single-chip and RBOM integration

3 PHS, Voice, Mobile Embedded & Outdoor Consumer ElectronicsData Networking: Retail, PC OEM, Enterprise Market Segments 100s of Millions Billions 100 Million +

4 Recent Launches World’s First n Single chip 11ag products (combined MAC/BB/Radio) n Single chip 11g access point JumpStart for Wireless ™ n Simple, secure WLAN Configuration VLocity ™ MIMO n Super G ® with Beamforming & Maximal Ratio Combining Netgear ® D-LINK ® Introducing the AR5006EX & EG with support for PCI Express ™ Introducing the AR5006AP-GS with support for XR ™ and Super G ®

5 AR1900 n World’s first single-chip for PHS AR6000 ROCm ™ Radio-on-Chip for Mobile n First single-chip for solutions for single and dual-band for mobile products AR5007AP-G n The world’s most integrated single-chip g solution for APs UTStarcom® Atheros® AR6001X BGA Design fewer external components Recent Launches

The n Standard Development

7 Stable draft sent to SA Sponsor Ballot n Standardization Timeline JP adopts EWC specification; JP submits specification to IEEE; IEEE unanimously confirms IEEE Milestones Wi-Fi Alliance Milestones Jan Jun Sep Mar ’07 Apr ‘07 Interoperability Plan Market Requirements Document Due Date Complete draft sent to Exec Committee of IEEE Publication of Final n Standard

8 Draft n – Technical Highlights n PHY transmission rates up to 600Mbps n Enhanced efficiency MAC with frame aggregation n Increased range via multiple antennas and advanced coding n MIMO techniques n Spatial multiplexing n Maximal Ratio Combining n Space Time Block Coding n Support for 1 to 4 concurrent data streams n 2.4/5GHz dual band support n 20/40MHz channel support n Mixed mode interoperability with a/b/g networks

The Power of 3

10 Introducing the World’s First Triple-Radio Chip

11 AR5008 Two-Chip Solution AR5416  MAC and BB  Spatial Multiplexing and Maximal Ratio Combining  Legacy a/b/g support AR5133  3 embedded 2.4/5 GHz radios  20MHz and 40MHz channels  300Mbps PHY rate per band Dual-band Radio MAC Baseband

12

13 3x3 vs. “Antenna Configuration” Simply adding antennas to fewer transmit chains does not equal 3x3 Information Loss

sq ft home 3x3 delivers ~50% greater throughput at range 3x x % Δ +44% +51% +62% 50 ft 100 ft 150 ft g % throughput! +51% throughput! +62% throughput! Signal-Sustain Technology enables significantly greater connection reliability, even as range increases…

15 XSPAN Performance-Price Sweet Spot Normalized Cost and Performance 2x22x33x3 MIMO Performance and Cost 3x44x4 2 streams Cost Performance

16 AR /5 GHz Solutions Also available in single-band designs AP72 Access Point/Router (front) CB72 Cardbus Card XB72 Mini Card

17 Wireless Triple Play with XSPAN Data Data/ Music Data/ Gaming Video Voice

18 XSPAN Summary Atheros n family will lead with high-performance 3 x 3 configuration n World’s first 3-radio chip n Offering ~50% performance improvement n Providing reliable coverage in even large homes Atheros 3 x 3 expected to lead market with performance/price sweet spot n Highest level of chip and RBOM integration promises low-cost at retail n Added integration in 2006 will enable even lower “mainstream” n pricing

Expanding Performance and Possibilities with n February 15, 2006