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High-performance 802.11a/g and 802.11g chipsets

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PHILIPS Electronics has unveiled highly integrated, high-performance two-chip solutions for 802.11a/g and 802.11g wireless local area network (WLAN) applications.

The Philips dual-mode 802.11a/g chipset combines a single-chip multi-protocol baseband/media access controller (SA5250) with a single-chip RF transceiver (SA5251) for a complete subsystem for IEEE 802.11a and 802.11b/g frequency bands.

By supporting 2.4GHz, 5GHz and the 4.9GHz band used in Japan, the chipset is suitable for worldwide use.

The chipset provides the industry's highest standards-based throughput, achieving greater than 98.5 per cent of theoretical transmission control protocol (TCP) maximum throughput in 802.11a, b and g modes.

Featuring an advanced architecture that is programmable to the media access control and physical (PHY) layers, the Philips 802.11a/g chipset is designed to support product enhancements and future IEEE 802.11 extensions including 802.11e (improved quality of service), 802.11i (enhanced security) plus 802.11f, h, i and j with firmware upgrades.

The complete Philips WLAN solutions enable high-speed 802.11a/g or 802.11g wireless networking for data and streaming media, providing impressive range and the industry's highest standards-based data throughput.

Target applications include WLAN adapter cards, access points, gateways, PCs, PC peripherals and consumer electronic devices.

With its built-in "detect and connect" functionality that automatically moves to the highest speed connection available (802.11 a, g or b), the Philips 802.11a/g solution gives users the ability to roam freely between 802.11 networks. The chipset offers excellent range of up to 150 meters at 11 Megabits per second (Mbps) via 802.11b, up to 100 meters at 54 Mbps via 802.11g and up to 70 meters at 54 Mbps via 802.11a.

In addition, the chipset also supports data rates of up to 72Mbps per channel in an enhanced single-channel 256-quadrature amplitude modulation (QAM) orthogonal frequency division multiplexing (OFDM) mode.

Unlike other proprietary enhanced modes, the Philips solution can simultaneously support the enhanced mode and concurrently communicate with other standards-based 802.11 clients.

The Philips chipset is also designed to support Wi-Fi multimedia extensions (WME) for improved quality of service, Wi-Fi protected access (WPA) with Temporal Key Integrity Protocol (TKIP) and Advanced encryption standard (AES), and the Cisco compatible extension (CCX) program.

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