LAN9373T-I/ZMX

Controllers Overview

The LAN9373T-I/ZMX is an automotive-grade Ethernet switch featuring five integrated 100BASE-T1 PHYs and one SGMII port. It supports Full AVB and TSN standards, including IEEE 802.1AS time synchronization and IEEE 1588v2 PTP. The device operates within a Grade 2 Automotive temperature range of -40°C to +105°C and holds AEC-Q100 qualification. It utilizes a 128-pin TQFP package with dimensions of 14 x 14 mm.

Controllers Feature Summary

• Supports Full Audio Video Bridging (AVB) and Time-Sensitive Networking (TSN) protocols for deterministic traffic handling.
• Integrates five 100BASE-T1 physical layer transceivers compliant with IEEE 802.3bw-2015 specifications.
• Includes a dedicated Serial Gigabit Media Independent Interface (SGMII) port for high-speed host connectivity.
• Provides advanced diagnostics via LinkMD+ cable testing and OPEN Alliance TC10 sleep/wakeup capabilities.

Controllers Applications

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

Controllers Procurement Notes

Verify the specific suffix 'I' corresponds to the industrial/automotive temperature grade (-40°C to +105°C) and 'ZMX' indicates the tape and reel packaging format. Confirm the component meets AEC-Q100 Grade 2 requirements for your target application environment before finalizing orders.

Controllers Selection Notes

Select this model when five 100BASE-T1 ports are required alongside a single SGMII uplink. The LAN9372 variant lacks the SGMII port but includes a 100BASE-TX port. The LAN9374 offers six 100BASE-T1 ports without SGMII. Ensure the design accommodates the 128-pin TQFP footprint and thermal requirements.

Controllers Part Context

This component belongs to the Microchip LAN937x family of scalable, compact Ethernet switches designed for automotive applications. The family shares common software drivers and pin compatibility across the 128-TQFP variants, facilitating design flexibility while differentiating based on port count and interface types.

Controllers Replacement Considerations

LAN9372T-I/ZMX: Lacks SGMII, adds 100BASE-TX. LAN9374T-I/ZMX: Adds sixth 100BASE-T1 port, lacks SGMII. LAN9371T-I/ZMX: Fewer integrated PHYs. All share the same 128-pin TQFP package and software driver.

Controllers FAQ

Does the LAN9373 support cascade mode?

Yes, the LAN9373 supports cascade mode to increase the total port count by connecting multiple devices.

What is the maximum operating junction temperature?

The device is qualified for Grade 2 Automotive temperatures, supporting a maximum junction temperature of 125°C.

How does the device handle energy efficiency?

It features EtherGREEN technology, including OPEN Alliance TC10 sleep/wakeup, non-TC10 link partner energy detect wake-up, and ultra-deep-sleep power down modes.