Semtech has announced its Tri-Edge CDR SR chip-sets to for datacentre connectivity

GN2558 is a quad PAM4 CDR with an integrated VCSEL driver, and GN2559 is a quad PAM4 CDR with an integrated linear transimpedance amplifier (TIA).

“Semtech has demonstrated the inter-working of its chipset solution on 400G ports for commercial Ethernet switches over 70m of OM3 fiber and 100m of OM4 fiber,” says Semtech’s Julius Yam, “this chipset is  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 equalization and fast startup to streamline system bring up.

The GN2559 linear TIA and CDR provides superior receiver performance with fast adaptation and startup. The GN2559 includes configurable output equalization enabling robust electrical interfaces.