Automotive PHY addresses data-heavy vehicle architectures

Automotive PHY addresses data-heavy vehicle architectures

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By Christoph Hammerschmidt

By providing up to 10 Gbps throughput data transmission for in-vehicle networks (IVNs), the 88Q4346 Ethernet PHY addresses the demand for ultra-high speed, secure and low latency data exchange on standards-based networks.

“To support the future of smarter and connected cars on the road, multi-gig Ethernet PHYs will enable high speed data transfer that is essential to powering advanced ADAS features in the vehicle,” says Amir Bar-Niv, vice president of Marketing, Automotive Business Unit at Marvell. “We remain dedicated to delivering best-in-class solutions that meet the needs of the in-vehicle networking market, and we’re proud to be one of the first suppliers to offer an 802.3ch capable Ethernet PHY with 2.5G, 5G and 10G Base-T1 support. In addition, with integrated 802.1AE MACsec, our newest PHY is securing these high-speed connections in next-generation automobiles.”

The 88Q4346, says the company, is essential as vehicle architectures are transitioning from domain-based to zonal-based platforms. In a domain-based architecture, Electronic Control Units (ECUs) of each domain are connected directly to the cameras, sensors and actuators across the car, requiring large amounts of cable to connect all end nodes. This cable harness is expensive, heavy and costly to install.

In zonal-based architecture, the 10G PHY enables the aggregation of signals and protocols in each zone of the car over multi-gig Ethernet backbone, using a single pair of light weight cables, to reduce cost and power consumption in electrical vehicles. Another driver for multi-gig IVNs, says the company, is the transition to 5G networks, which will enable almost instantaneous downloading of over-the-air applications and software updates as well as direct communication between vehicles, to improve safety and ultimately moving forward autonomous transportation.

The 88Q4346 multi-gig Ethernet PHY is designed to provide the high-speed and low latency that 5G networks require. In addition, this technology enables OEMs to leverage Ethernet’s security and quality-of-service features to meet the demands of emerging vehicle-to-everything (infrastructure, pedestrians, cloud) communication.

The 88Q4346 PHY complements the company’s existing multi-gig automotive switches and is currently sampling to customers planning the transition to next-generation IVN architecture. Evaluation development boards are also available.  



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