Semtech Introduces Tri-Edge 50G PAM4 CDR Transmitters for Long Reach Data Center Applications

Integration of CDRs with laser drivers enables lower power, reduced latency and lower cost for 50G per channel optical links up to 10km

–Semtech Corporation , a leading global supplier of high performance analog and mixed-signal semiconductors and advanced algorithms, announced new integrated circuits (IC), the Tri-Edge GN2555 and GN2556. The latest ICs are a part of Semtech’s Tri-Edge clock and data recovery (CDR) transmitter solutions to enable next-generation data center long reach (LR) optical links. The GN2555 is a quad channel PAM4 CDR with integrated directly modulated laser (DML) drivers and the GN2556 is a quad channel PAM4 CDR with integrated externally modulated laser (EML) drivers. The GN2555 and GN2556 are fully compliant to IEEE 802.3bs and Open Eye MSA specifications.

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“In addition, the GN2555 DML drivers as well as the GN2556 EML drivers offer proprietary laser compensation to enable a wide range of low cost laser options for data center interconnects.”

“The GN2555 and GN2556 ICs are based on Semtech’s Tri-Edge PAM4 CDR technology that is a robust and proven solution for data center optical transceivers. Integration of the CDRs and drivers offers lower power consumption as well as reduced size and lower costs for our optical module customers,” said Weiliang Deng, senior product line manager in Semtech’s Signal Integrity Products Group. “In addition, the GN2555 DML drivers as well as the GN2556 EML drivers offer proprietary laser compensation to enable a wide range of low cost laser options for data center interconnects.”

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The Tri-Edge GN2555 and GN2556 are now available for sampling and can be paired with the Tri-Edge GN2559S receiver for a complete 200G FR4/LR4 solution. Semtech offers complete reference design kits (RDK) for the solutions to enable rapid adoption.

Semtech’s Tri-Edge CDR portfolio for data centers includes:

• GN2558: PAM4 4x56G CDR + VCSEL Driver
• GN2559: PAM4 4x56G CDR + TIA
• GN2538: PAM4 2x56G CDR + VCSEL Driver
• GN2539: PAM4 2x56G CDR + TIA
• GN2559S: New Low Power Quad PAM4 CDR Receiver With Integrated TIA