Sunday, July 17, 2011

Vitesse Delivers 14 Gbps Adaptive Quad Channel Extender

Vitesse Semiconductor introduced a multi-protocol, adaptive quad channel extender for next-generation protocols such as 10G/40G/100G Ethernet, Infiniband FDR, and 16G Fibre Channel. The new VSC7224 delivers a data rate range from 155 Mbps to 14.1 Gbps and power consumption as low as 100mW per channel.

The device offers a comprehensive, low power signal integrity solution which can adaptively compensate for signal degradation in challenging network environments. It features Vitesse's proprietary adaptive FlexEQ technology.

Vitesse's VSC7224 delivers a hardware-based equalization suite, capable of equalizing multiple 14 Gbps signals over ranges greater than 65 inches of FR4 board trace or 20m of 24AWG twin-ax copper cable.

It uses four Decision Feedback Equalizer (DFE) taps to combat impairments in the signal from crosstalk and reflections, achieving an Isolation to Crosstalk Ratio (ICR) of better than 12dB.

Vitesse said the hardware-enabled adaptive receiver on the VSC7224 eliminates the arduous process of manually optimizing each individual lossy channel.

"The combination of autonomous adaptive equalization and a Clock & Data Recovery (CDR) unit that can be used at multiple speeds to effectively reset the jitter budget, makes this channel extender extremely useful for next-generation systems, especially to reduce system design time and improve yields," said Abhi Dugar, research manager, wired communications semiconductor research at IDC. "As networks move to mixes of Ethernet, Infiniband, and Fibre Channel, it becomes increasingly important to design for multiprotocol environments operating at a variety of rates."