Ethernet transceiver module BCM85812

low-powerhigh-performance

The Broadcom® BCM85812 is a high-performance and low-power 800GbE PAM-4 transceiver PHY capable of driving eight lanes of 106-Gb/s PAM-4 at 53 Gbaud, while supporting DR8, 2x FR4, and 2x LR4 optical links. The BCM85812 uses a market-leading 5-nm PAM-4 PHY transceiver technology platform to accelerate 800G QSFP-DD/OSFP optical module availability. The advanced Broadcom DSP technology and equalization techniques compensate for optical impairments while maintaining the world’s lowest power pluggable optical modules and co-packaged optical solutions and help enable the deployment of 51.2-Tb/s and higher-density switch ASICs. The BCM85812 incorporates a highly differentiated feature set, including integrated TIA, laser drivers, market-leading FEC capability options, and system-side switch ASIC SerDes interoperability to provide an unmatched competitive advantage to the market. In 800GbE mode, the BCM85812 converts eight lanes of 106 Gb/s (at 53-Gbaud PAM-4) from the system side into eight lanes of 106 Gb/s (at 53-Gbaud PAM-4) to drive next-generation high-density optical PAM-4 links inside QSFP-DD and OSFP form-factor modules. The BCM85812 also features crossbar on both the system and line sides for easier routing in PCBs. The on-chip clock synthesis is performed by a low-cost 156.25-MHz reference clock through high-frequency, low-jitter phase-locked loops (PLLs).