LAN9370T-I/KCX

Controllers Overview

The LAN9370T-I/KCX is a five-port AVB/TSN Ethernet switch manufactured by Microchip Technology. It integrates four IEEE 802.3bw-2015 compliant 100BASE-T1 PHYs and one configurable MAC port supporting RGMII, RMII, or MII interfaces. The device operates within an industrial temperature range of -40°C to +105°C and is housed in a 64-pin VQFN (8x8 mm) package with wettable flanks. It supports full Audio Video Bridging, Time Sensitive Networking protocols including IEEE 802.1AS and 1588v2 PTP, and High Availability Seamless Redundancy.

Controllers Feature Summary

• Integrates four 100BASE-T1 physical layer transceivers for automotive single twisted-pair connections alongside a configurable external MAC interface.
• Provides comprehensive hardware support for Time Sensitive Networking standards, including IEEE 802.1AS time synchronization and IEEE 802.1Qbv scheduling.
• Includes advanced diagnostic capabilities such as LinkMD+ cable testing and Deep Packet Inspection using TCAM classification.
• Supports energy efficiency features compliant with OPEN Alliance TC10 sleep/wakeup specifications and ultra-deep-sleep power modes.

Controllers Applications

• Advanced Driver-Assistance Systems (ADAS)
• In-Vehicle Backbone Networks
• Automotive Gateways

Controllers Procurement Notes

Verify the specific suffix KCX confirms the 64-VQFN package with wettable flanks. Confirm the 'I' designation matches the required Grade 2 Automotive temperature range of -40°C to +105°C. Ensure the ordering documentation references the correct datasheet revision DS00002819B for accurate pinout and electrical characteristics.

Controllers Selection Notes

Select this component when designing systems requiring integrated 100BASE-T1 PHYs with TSN capabilities. It is suitable for applications needing direct connection to host processors via RGMII/RMII/MII. Consider cascade mode requirements if higher port counts are necessary beyond the integrated five ports.

Controllers Part Context

This part belongs to the LAN937x family of Ethernet switches. While other variants like the LAN9371 or LAN9372 offer different port counts or packages, the LAN9370 specifically provides four integrated 100BASE-T1 ports and one MAC port in a compact 64-VQFN form factor.

Controllers Replacement Considerations

LAN9371, LAN9372, LAN9373, and LAN9374 are pin-compatible alternatives within the same family. Verify that the alternative variant meets the specific port count and package requirements of the design.

Controllers FAQ

What is the maximum supported SPI clock frequency?

The maximum supported SPI clock frequency is 50 MHz.

How is the exposed pad on the 64-VQFN package connected?

The exposed pad (VSS) on the bottom of the package must be connected to ground with a via field.

Does the device support IEEE 1588v2 PTP?

Yes, the device supports IEEE 1588v2 PTP with Transparent Clock, Leader/Follower Ordinary Clock support, and End-to-End or Peer-to-Peer configurations.