Microchip Technology launched two new Ethernet Physical Layer (PHY) chips designed specifically for software-defined vehicles and industrial networks. The LAN878x and LAN888x Single Pair Ethernet (SPE) PHYs combine three critical capabilities for connected automobiles: MACsec security for encrypted data transmission, Time-Sensitive Networking (TSN) for deterministic communication, and ASIL-B functional safety certification.
The chips operate at 1 gigabit per second, addressing the growing bandwidth demands of modern vehicle architectures. SDVs increasingly rely on robust networking infrastructure to handle infotainment systems, autonomous driving sensors, and vehicle-to-infrastructure communication. Single Pair Ethernet reduces wiring complexity and weight compared to traditional automotive networking standards like CAN and FlexRay, lowering manufacturing costs and improving fuel efficiency.
MACsec protection prevents unauthorized access to vehicle networks, critical as hackers target connected systems. TSN guarantees low-latency, deterministic packet delivery for real-time functions like brake-by-wire and steering control. ASIL-B certification ensures the chips meet functional safety requirements for automotive applications where failures could injure occupants.
Microchip's move reflects broader industry momentum toward Ethernet-based vehicle architectures. Established automakers and EV startups are adopting switched Ethernet networks to consolidate multiple legacy buses into unified platforms. Companies like Tesla, Volkswagen, and BMW have transitioned to Ethernet-centric designs that simplify integration of OTA updates and autonomous features.
The SPE variant uses a single twisted pair of wires instead of multiple pairs, making it particularly attractive for weight-conscious EV platforms where every kilogram impacts range. Competitors including NXP, Infineon, and Analog Devices offer similar Ethernet PHYs, but Microchip's