Microchip Technology LAN938x 100BASE-T1 Gigabit Ethernet Switches
Microchip Technology LAN938x 100BASE-T1 Gigabit Ethernet Switches are scalable, compact, and cost-effective multi-port switches based on the IEEE 802.3bw-2015 specification. These devices feature a layer-2+ managed Ethernet switch with up to five 100BASE-T1 PHY transceivers (four for LAN9381/2, five for LAN9383/4), up to three MAC ports, and an Arm® Cortex® M7 CPU subsystem. The LAN938x family features 2MB of integrated flash memory and a hardware security engine, offering a comprehensive single-chip AVB/TSN bridge solution. The LAN9382/4 models also offer a 100BASE-TX port for applications requiring an automotive OBD connection. Microchip Technology LAN938x switches are available in two temperature ranges and are AEC-Q100 qualified for use in gateways, advanced driver assistance systems (ADAS), infotainment, telematics, and in-vehicle networking systems.Features
- 4x 100BASE-T1 ports
- 2x RGMII/RMII/MII
- 1x RGMII/RMII/MII or (1G/2.5G) SGMII port
- 300MHz Arm Cortex M7 CPU subsystem
- Integrated 2MB flash code memory
- Hardware security engine
- Cascade mode for higher port count
- Enhanced EMC performance
- Full AVB audio video bridging
- Time-sensitive networking support
- OPEN alliance TC10 sleep/wakeup
- LinkMD®+ enhanced cable diagnostics
- flexPWR® technology power management
- Small-footprint 128-pin TQFP (14 x 14 mm) package
- Industrial temperature (-40°C to +85°C), Grade 2 automotive temperature (-40°C to +105°C)
- Switch management capabilities
- Full wire-speed, non-blocking Gigabit switch core
- <140ms “Ethernet Ready” time, with secure boot
- IEEE 802.1Q VLAN support
- AVB and TSN hardware support
- Smart low-latency cut-through forwarding mode
- Deep Packet Inspection (DPI) using TCAM
- IEEE 1588v2 PTP and clock synchronization
- Time-aware precision GPIO
- OPEN Alliance (TC1) advanced diagnostics compliant
- Self-test packet generator/detector
- Extended MIB performance counters
- EtherGREEN™ energy efficiency
- Low RF emissions
- OPEN Alliance (TC6) RGMII EPL compliant
- Hardware security engine
- AEC-Q100 automotive product qualification
- Functional safety ready
- Compliant to OPEN TC11 switch requirements
Applications
- Gateways
- ADAS
- Infotainment
- Telematics
- In-vehicle networking
Videos
Block Diagram
Additional Resources
Published: 2024-09-27
| Updated: 2025-10-31
