Semtech’s PAM4 CDR platform goes in to production

Created June 2, 2020
Technologies and Products

Chip vendor Semtech Corporation has announced production availability of GN2558 and GN2559, its Tri-Edge™ CDR SR solutions to enable next-generation data centre multi-mode interconnectivity. The GN2558 is a quad PAM4 CDR with an integrated VCSEL driver, and the GN2559 is a quad PAM4 CDR with an integrated linear transimpedance amplifier (TIA).

“Semtech has successfully demonstrated the inter-working of its chipset solution on 400G ports for commercial Ethernet switches over 70 metres of OM3 fibre and 100 metres of OM4 fibre,” said Julius Yam, senior product line manager in Semtech’s Signal Integrity Products Group. “The GN2558 and GN2559 ICs provide the highly desired low power, low latency analogue solution to meet the needs of high-performance computing (HPC), artificial intelligence (AI) and Cloud data centre networks. This chipset is also fully compliant to the 200G-SR4 Open Eye MSA specification.”

The GN2558 CDR includes proprietary VCSEL compensation to enable a wide range of VCSEL options with fully adaptive input equalisation and fast start-up to streamline system bring up. The GN2559 linear TIA and CDR provides superior receiver performance with fast adaptation and start-up. The GN2559 includes configurable output equalisation enabling robust electrical interfaces.

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This article was written
by Peter Dykes

Peter Dykes is a independent telecoms and technology journalist who has over that last 30 years written for a wide range of B2B publications and companies. A former BT engineer, he specialises in networks and associated support systems. He is currently Editor of Optical Connections.