Signal Conditioner For Copper Interconnects

Maxim Integrated Products has introduced the MAX3987, a quad 1 to 8.5Gbps signal conditioner for copper interconnects. Each channel can equalise up to 30in of FR4 or 10m of 24AWG cable at its input and output, with data rates up to 8.5Gbps. This device can be used as a receive equaliser, pre-emphasis driver or redriver, allowing it to be placed at the beginning, middle, or end of a link. The MAX3987 features an I2C interface for programming the pre-emphasis, output swing and output polarity of each channel.

External pins can also be used to globally program these features. Designed as a multiprotocol solution, the MAX3987 facilitates IP reuse by enabling customers to use one design to address multiple markets. It is suited for 6.25Gbps XAUI, 8.5Gbps Fibre Channel, 6.0Gbps SAS/SATA and Infiniband DDR applications. The MAX3987 has signal-detect and output-squelch capabilities. The device has a response time of 2 to 5ns in fast signal-detect mode, making it compatible with out-of-band (OOB) signaling in SAS and SATA applications. A slow signal-detect mode is available for XAUI, Fibre Channel and Infiniband applications.

The MAX3987 is available in a 7 x 7mm, 48-pin TQFN package and has a pinout designed to minimise board space and optimise high-speed signal routing. The device is fully specified over the -40 to 85C extended industrial temperature range and operates from a 3.3V supply over this range. The MAX3987 can also operate from a 2.5V supply over the 0 to 85C temperature range, reducing power consumption by 25 per cent.

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