Broadcom launches 400G/lane optical DSP for AI data centers

Broadcom Inc. (NASDAQ: AVGO) announced the availability of its 3nm 400G/lane optical PAM-4 DSP, the Taurus BCM83640, designed for 1.6T transceiver solutions. The chip enables optical transceiver manufacturers to produce low-power 1.6T pluggable modules for AI data centers.

The monolithic 3nm device features integrated laser driver technology and supports optical modules from 1.6T to 3.2T. The company states the product complies with IEEE and OIF standards and supports LR links on the chip-to-module electrical interface.

The 400G/lane technology doubles bandwidth per optical lane compared to 200G/lane architectures. 1.6T pluggable modules using the Taurus BCM83640 enable 102.4T switching capacity in a 1RU system, according to the company. The technology provides a foundation for eventual deployment of 3.2T module solutions with 400G/lane electrical interfaces for 204.8T switches.

"Taurus, the industry's first 1.6T DSP based on 400G/lane I/O, doubles the throughput per lane to enable the next generation of 3.2T optical modules," said Vijay Janapaty, vice president and general manager of Broadcom's Physical Layer Products Division.

Vladimir Kozlov, CEO of LightCounting, projected that more than 100 million units of 1.6T and 3.2T optical transceivers will be shipped over the next five years, with approximately half using 400G optics.

Broadcom has begun sampling the BCM83640 to early access customers and partners. The information is based on a company press release.

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