The Microchip LAN9381/2/3/4 is a scalable, compact and cost-effective, multi-Port AVB/TSN 100BASE-T1 Ethernet Switch family based on the IEEE 802.3bw-2015 specification. The LAN938x incorporates a layer-2+ managed high-performance Ethernet switch, up to five (four for the LAN9381/2, five for the LAN9383/ 4) 100BASE-T1 physical layer transceivers (PHYs), up to three MAC ports, and an ARM Cortex M7 CPU subsystem. With the addition of integrated 2MB code flash memory and a hardware security engine, the LAN938x family delivers a fully integrated, single-chip AVB/TSN bridge solution. An additional IEEE 802.3/802.3u compliant 100BASE-TX (LAN9382/4 only) port is provided for applications where an integrated automotive OBD port is required.

The LAN938x is available in an industrial (-40°C to 85°C) temperature range, Grade 2 Automotive (-40°C to +105°C) temperature range and is qualified to AEC-Q100 automotive use cases such as gateways, Automated Driver-Assistance Systems (ADAS), infotainment, telematics, and in-vehicle networking.

The LAN938x fully supports IEEE Audio Video Bridging (AVB) and key TSN (Time Sensitive Networking) standards, which provide high Quality of Service (QoS) for latency sensitive traffic streams over Ethernet, including:

• IEEE 802.1AS 2020 time synchronization

• IEEE 1588v2 PTP and clock synchronization

• IEEE 802.Qav traffic shaping

• IEEE 802.1Qbv (TSN) time-aware scheduler

• IEEE 802.1Qci (TSN) ingress filtering and policing

• IEEE 802.1QCB (TSN) frame replication and elimination

Additionally, a robust assortment of EtherGREEN™ energy efficiency features are provided, including Open Alliance TC10 sleep/wakeup partial networking, non-TC10 link partner energy detect wake-up, and ultra-deep-sleep power.

Microchip's complimentary and confidential MicroCHECK design review service, which offers insight from the initial concept to the final PCB layout, is available to customers who are using our products in their projects. You can confidently submit your design materials in a secure and private setting, and our expert engineers will provide individualized feedback to enhance your design. MicroCHECK design review service is subject to Microchip's Program Terms and Conditions and requires a myMicrochip account.