Broadcom shows 5nm PHY with integrated laser driver for 1.6T links
Broadcom is showing its monolithic 5nm 800G (8:4) PAM-4 DSP and PHY with integrated laser driver for next generation optical links.
The Sian BCM85822 is on show at the 49th European Conference on Optical Communication (ECOC 2023). The PHY integrates 200G/lane serial optical interfaces, which enable optical transceiver manufacturers to cost effectively deliver 800G and 1.6T (1.6Tbit/s) pluggable modules and meet the growing bandwidth needs and low power consumption requirements of hyperscale data centres.
The DSP is compliant to all IEEE and OIF standards, capable of supporting MR links on the chip to module electrical interface and supports optical modules from 800G to 1.6T with the IEEE compliant (128,120) Hamming Inner Code.
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Given the increasing bandwidth demands from AI-driven workloads in hyperscale data centers, deploying 1.6T OSFP-XD transceiver modules would double the bandwidth capacity per 1RU without changing the existing infrastructure. The BCM85822 is optimized for the 1.6T OSFP-XD transceiver module design and would effectively enable 51.2T switching capacity in a 1RU rack to improve bandwidth density in hyperscale data centers. Further, the adoption of 200G/lane optical interfaces lays the foundation for the eventual deployment of 1.6T and 3.2T solutions with 200G/lane electrical interfaces, which are needed for cloud providers to support next generation switches and scale AI workloads.
“This latest generation of DSP operating at 200G/lane extends Broadcom’s leadership in high-bandwidth PHY and enables the lowest power optical modules in the industry,” said Vijay Janapaty, vice president and general manager of the Physical Layer Products Division at Broadcom. “This, in turn, lays the foundation for next generation switching platforms for AI/ML clusters and networks.”
As well as a demo with Semtech, Broadcom is showing the BCM85822 and 200G EML operating inside Eoptolink 1.6T DR8, 1.6T 2xFR4 and 800G DR4 optical modules running live traffic stream of data running between optical modules, which are connected to a Tomahawk 5 switch in an end-to-end link.
Broadcom is currently sampling both the BCM85821 and BCM85822 to its early access customers and partners. The BCM85821 is an 800G (8:4) PAM-4 DSP PHY with no integrated laser driver.
www.broadcom.com/products/ethernet-connectivity/phy-and-poe/optical/bcm85821
www.broadcom.com/products/ethernet-connectivity/phy-and-poe/optical/bcm85822
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