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Backplane optimised 2.5Gbps transceiver

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NATIONAL Semiconductor, represented in Australia by Arrow Electronics , has entered the multi-gigabit serialiser/deserialiser (SerDes) market with the introduction of a 2.5 gigabit per second (Gbps) transceiver optimised for backplane, cable and fibre optical applications.

National's new four-channel SerDes solution enables communications equipment vendors to quadruple the capacity of their existing platforms.

National's DS25C400 is a four-channel SerDes especially designed to provide a reliable 2.5Gbps per channel solution for backplane interconnect between line cards and switch cards in routers, switches, cross connects and multiplexers.

It is suitable for existing FR4 backplanes designed for lower speeds, enabling huge cost savings and "as needed" capacity upgrades.

Existing backplane and cable bandwidth limitations can create large amounts of inter-symbol interference (ISI) distortion unless costly materials and connectors are used.

The DS25C400's configurable transmitter pre-emphasis compensates for ISI even when driving cables up to 10-20 metres.

On the receiver end, the device's configurable equalisation and tight thresholds allow it to reliably recover data-even from signals with severe ISI distortion.

National's DS25C400 operates over the full -40°C to +85°C industrial temperature range.

The combination of low power (less than 2W typical with all channels driving and receiving 2.5Gbps) and thermally-enhanced 324-ball PBGA package minimises thermal management and airflow issues.

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