Kandou SerDes capable of 1Tbit/sec

December 03, 2015 // By Peter Clarke
The Glasswing SerDes core in development at startup Kandou Bus SA (Lausanne, Switzerland) has been tested and demonstrated the "capability of achieving" 1Tbit/sec chip-to-chip at less than 1W of power consumed.

Kandou’s technology is based on signaling method called Chord Signaling in which correlated signals are sent across multiple wires. The version of Chord Signaling employed in Glasswing, CNRZ-5 coding, delivers 5 bits over 6 wires for a total bandwidth of 125 Gbps. The link achieves a BER of <10^-15 at the targeted data rate of 25 GBaud and can support channels up to 12 mm in length (die-to- die insertion loss up to 6 dB) at full rate and 24 mm at half rate.

 

The link has also proven to be robust under stress including overclocking up to 30 GBaud, temperature testing from 0° to 100°C, and running full rate up to 24 mm. Measured power for a single instantiation of the link is 1.1 pJ/bit and in a quad configuration would drop to 0.97 pJ/bit.

Through the use of a bi-directional version of Glasswing 2 Tbps of bandwidth can be achieved using only 320 signal pins and standard bump pitches, the company said.

"System architects are increasingly interested in 2.5D integration for flexibility, faster time to market, improved performance and lower power ," said Amin Shokrollahi, Kandou founder and CEO. " Our Glasswing link, which is optimised for chip-to-chip interconnect inside a package, allows customers to achieve both high bandwidth and low power and truly realises the potential of 2.5D packaged solutions. "

The Glasswing link IP is delivered as a hard IP and licensed customers receive: data sheet and application notes, channel compliance guidelines, standard integration views (GDS, LEF, verilog, .lib), production test support, Spice models and Kandou proprietary KEYE and TAU modelling tools. 

Kandou is a 2011 spinoff from Ecole Polytechnic Federale de Lausanne (EPFL).

Related links and articles:

www.kandou.com