1.6Tbit/s Ethernet PHY on 5nm for cloud data centres

June 07, 2021 // By Nick Flaherty
1.6Tbit/s Ethernet PHY on 5nm for cloud data centres
The Alaska C Ethernet PHY from Marvell doubles bandwidth to 1.6Tbit/s with 100G PAM4 I/Os using TSMC’s 5nm process

Marvell has developed the industry's first 1.6T Ethernet PHY with 100G PAM4 electrical input/outputs (I/Os) in 5nm.

100G serial I/Os play a critical role in the cloud infrastructure to help move data across compute, networking and storage in a power-efficient manner in the data centre with 1.6Tbit/s Ethernet.

The 88X93160 enables next-generation 100G serial-based 400G and 800G Ethernet links for high-density switches. The doubling of the signalling rate creates signal integrity challenges, driving the need for retimer devices for high port count switch designs. It's critical that retimer and gearboxes used for these applications are extremely power efficient. Implemented in the latest 5nm node, the Marvell 800GbE PHY provides a 40% savings in I/O power compared to existing 50G PAM4 based I/Os.  

"100G serial electrical signaling is vitally important because it serves as the foundational speed for the next generation of high-speed networks," said Alan Weckel, founder and technology analyst of 650 Group. "Challenges in signal integrity typically arise as I/O speeds increase. As the industry transitions to 100G serial electrical signaling on high density switches and optics, Marvell's 1.6T PHY is the only solution that's available in the market today to support this transition."

Marvell says the 88X93160 is the first PHY device fully compliant with IEEE's 802.3ck standards for 100G serial I/Os and the Ethernet Technology Consortium's 800GbE specifications. The device supports Gearboxing functionality which helps data center operators get the full bandwidth capabilities of the switch ASICs with 100G serial I/Os while interfacing with existing 50G PAM4 based 400G optical modules.

"Data centre demand for 400GbE and beyond is experiencing exponential growth," said Achyut Shah, senior vice president and general manager of Marvell's PHY business unit. "We are very proud to offer the industry's first dual 1.6T PHY with 100G PAM4 I/Os designed for cloud data centers. Our 112G SerDes in 5nm boasts industry-leading power and greatly enhances the value that high-speed Ethernet brings to cloud data center applications."

With support for Ethernet speeds up to 800GbE, the 88X93160 enables customers to build systems that comply with the latest IEEE and Ethernet Technology Consortium standards.

The Marvell 1.6T Ethernet PHY is sampling now to select customers.

www.marvell.com

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