IN Brief:
- Microchip’s LAN878x and LAN888x PHYs support 100BASE-T1, 1000BASE-T1, and dual-speed 100/1000BASE-T1 variants.
- M-suffix devices integrate hardware MACsec security compliant with IEEE 802.1AE-2018.
- The families support automotive, industrial automation, robotics, avionics, and deterministic Ethernet applications.
Microchip Technology has launched the LAN878x and LAN888x families of Single Pair Ethernet PHY transceivers, adding hardware MACsec security, Time-Sensitive Networking support, and functional safety features for automotive and industrial systems.
The new PHY families are available in 100BASE-T1, 1000BASE-T1, and dual-speed 100/1000BASE-T1 variants. They are designed for secure, scalable Ethernet connectivity in software-defined vehicles, zonal gateways, industrial automation networks, robotics, avionics, and other systems requiring deterministic communication.
The LAN878x family includes LAN8781, LAN8781M, LAN8782, and LAN8782M. The LAN888x family includes LAN8881, LAN8881M, LAN8882, LAN8882M, LAN8883, LAN8883M, LAN8884, and LAN8884M. Devices with the M suffix support MACsec security.
Hardware-based MACsec is compliant with IEEE 802.1AE-2018 and provides frame-level confidentiality, data integrity, and replay protection. Integrating that capability in the PHY reduces the need to add security functions elsewhere in the system architecture and avoids placing additional latency or software overhead on higher-level processors.
The PHYs also support native Time-Sensitive Networking, allowing deterministic, low-latency communication for ADAS, zonal gateways, and safety-critical control networks. Enhanced diagnostics and link monitoring are included to support faster fault detection and stronger system-level safety mechanisms.
Microchip has engineered the devices for ISO 26262 ASIL-B systems. The families support Automotive Grade 1 operating conditions from -40°C to +125°C and a maximum junction temperature of 150°C. Hardware evaluation platforms, SGMII, USB, and PCIe plug-in boards, and Linux software drivers are available to support development.
Platform scalability is a central part of the design. Pin-compatible SKUs are offered across 100BASE-T1 and 1000BASE-T1 variants, with SGMII and RGMII host interfaces. That allows designers to reuse hardware layouts while scaling bandwidth as network requirements increase across vehicle and industrial platforms.
Ethernet is moving deeper into vehicles and industrial networks. Single Pair Ethernet supports lighter cabling, higher data rates, and IP-based networking over a single twisted pair. In cars, it is linked to the move from distributed domain ECUs towards zonal and centralised architectures. In factories and robotics, it supports more consistent networking from sensors and actuators up to controllers and edge systems.
Security and timing are now baseline requirements in many of those networks. As more control and diagnostic traffic moves over Ethernet, the network has to support predictable latency, authenticated communication, and fault visibility. Mixed-criticality systems add further pressure, with diagnostics, control, perception, infotainment, and safety functions sharing parts of the same network architecture.
By placing MACsec, TSN support, diagnostics, and functional safety features into the PHY layer, Microchip is reducing the amount of work pushed into the host processor or software stack. Lower-layer capability will shape how automotive and industrial networks scale as architectures become more software-defined, more connected, and more dependent on deterministic Ethernet links.
