Fremont, Calif. - Cirrus Logic Inc.'s communications division is sampling a Fast Ethernet transceiver with near-end crosstalk margins the company claims can increase achievable cable lengths by as much as 60 percent.
The CS8952 is a standard CMOS part that uses advanced adaptive equalization for better noise immunity and NEXT margins to extend copper and fiber cable lengths beyond 160 meters.
The transmit circuitry keeps jitter under 400 ps, while the transmit driver has very low common-mode noise to reduce EMI problems.
Mike Petrowski, marketing manager in Cirrus' Austin-based communications division, said the company's experience in the CS8904 transceiver market proves Cirrus can be a volume producer of high-performance mixed-signal LAN devices.
The first rev of the CrystalLAN CS8952 has already gone through testing, and Revision B requires only minor changes in digital logic.
The chip supports a variety of digital interfaces: the Media Independent Interface for 10/100 standard LANs, a 5-bit code-group interface, and a 10 Base T serial interface. For fiber-based LANs, the CS8952 has pseudo-ECL interfaces. Cirrus is exploring the Reduced MII interface for a future four-channel transceiver product.
The register set of the device is compatible with National Semiconductor Corp.'s "Twister" transceiver, the DP83840A. Drivers for five separate LEDs are on-chip, indicating link, collision, full-duplex, transmit and receive.
The CS8952 comes in a 100-pin thin quad flat pack, and is priced at $8 each in quantities of 1,000. Production volume is set for June.
Call (800) 359-6414
www.cirrus.com
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