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SerDes tech uses NRZ signalling to reach up to 57.5Gb/s

Posted: 10 Sep 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Credo Semiconductor? SerDes? ASIC? NRZ signalling?

Credo Semiconductor has unleashed what it says is the industry's first SerDes transceiver technology that can deliver speeds up to 57.5Gb/s using NRZ signalling. NRZ signalling has been shown to provide significant power, area and cost advantages over alternative modulation schemes, but until now, has only been seen as viable at speeds up to 28Gb/s.

Credo was able to clock its device at 57.5Gb/s, achieving 50Gb/s speeds across a channel with more than 30dB loss at Nyquist frequency.

Credo intends to make the SerDes available as both IP and fully manufactured ASIC devices that can be used on line cards, in optical modules, in active copper cables, and in the next generation of switching, routing and compute ASICs. The current version of the 57.5Gb/s SerDes has been architected and manufactured using TSMC's mature 40nm-G process. The IP is being ported to TSMC's 16nmFF+ process.

In addition to the break through NRZ performance, the Credo SerDes features low jitter, low power and low latency, as well as advanced TX pre-emphasis equalisation, RX continuous time linear equalisation (CTLE) and decision feedback equalisation (DFE).

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