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Quad serialiser/deserialiser transceivers

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article image National Semiconductor’s SCAN50C400

NATIONAL Semiconductor, represented in Australia by Arrow Electronics , has developed one of the industry's fastest quad serialiser/deserialiser (SerDes) transceivers. These transceivers extend the life of today's high-end router backplanes by quadrupling the data throughput capacity.

This new single-chip device, the SCAN50C400, allows communication system designers to easily upgrade existing switch/fabric cards and line cards to 5Gbps serial data rate performance without a costly replacement of existing backplanes.

National Semiconductor's four-channel 5Gbps SCAN50C400 transceiver works effectively on existing FR-4 backplanes originally designed for lower speeds of 1.25Gbps and 2.5Gbps. The device's Current Mode Logic (CML) serial I/O supports multiple data rates at 1.25Gbps, 2.5Gbps or 5Gbps over a printed circuit board backplane. In total, the device provides a data link of up to 40 Gbps total throughput.

National's SCAN50C400 features a high-speed serial I/O that delivers unmatched signal integrity and jitter performance, as well as built-in self-test (BIST) circuitry and loopback modes to support at-speed testing. The device also has an IEEE P802.3ae D4.0 standard-compliant MDIO management bus to control the programmable features such as BIST, loopback modes and de-emphasis. In addition, the IEEE1149.1 JTAG-compliant SCAN features give the chip manufacturing testability. The SCAN50C400 is offered in a thermally enhanced 440-pin BGA package.

In addition to the SCAN50C400, National is developing products such as fixed and adaptive multi-Gigabit equaliser solutions and cross-talk cancellers. The first in the family of equalizers is a 3.125Gbps to 6.25Gbps fixed equaliser designed to compensate transmission medium losses and reduce the medium-induced deterministic jitter. The equaliser will be available for sampling in the first quarter of 2004.

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