LAN9381T-I/6XX

Controllers Overview

The LAN9381T-I/6XX is a 7-port, Layer 2+ managed Ethernet switch based on the IEEE 802.3bw-2015 standard for 100BASE-T1 automotive networks. It integrates four 100BASE-T1 PHY transceivers and three MAC ports, supported by an ARM Cortex-M7 CPU subsystem. The device features 2MB of integrated flash memory and a hardware security engine. It operates within a supply voltage range of 1.8V to 3.3V and supports I2C and SPI interfaces. The component is qualified to AEC-Q100 standards and functions reliably in industrial temperature ranges from -40°C to +105°C.

Controllers Feature Summary

• Integrates an ARM Cortex-M7 processor for advanced switching logic and protocol handling
• Includes dedicated hardware security engine for data protection
• Supports Audio Video Bridging (AVB) and Time-Sensitive Networking (TSN) protocols
• Features integrated 2MB flash memory for code and configuration storage

Controllers Applications

• Advanced Driver Assistance Systems (ADAS)
• Automotive infotainment systems
• Telematics control units
• In-vehicle gateway nodes

Controllers Procurement Notes

Verify the specific suffix '6XX' against the manufacturer's current datasheet to confirm exact package marking and revision level. Ensure the ordering part number matches the required temperature grade and packaging format. Cross-reference the AEC-Q100 certification status with the latest quality documentation before integration into safety-critical automotive designs.

Controllers Selection Notes

Select this model when a compact solution requires multiple 100BASE-T1 ports combined with local processing power. The integrated CPU allows for complex network management without external controllers. Consider the 128-pin TQFP-EP package constraints during PCB layout. Verify that the system power budget accommodates the 1.8V to 3.3V operating range requirements.

Controllers Part Context

This component belongs to the LAN938x family of automotive Ethernet switches. It shares the core architecture with models like the LAN9382, which adds a 100BASE-TX port for OBD connectivity. The LAN9381 variant focuses specifically on multi-port 100BASE-T1 applications, offering a balance of port density and computational capability for modern vehicle networks.

Controllers Replacement Considerations

The LAN9382T-I/6XX serves as a functional alternative if a 100BASE-TX port is required alongside the 100BASE-T1 connections. Other LAN938x variants may offer different port counts but share similar pinouts and software drivers. Verify mechanical compatibility and firmware support before substituting.