LAN9252I/ML

Controllers Overview

The LAN9252I/ML is a 2/3-port EtherCAT slave controller from Microchip Technology, featuring dual integrated Ethernet PHYs with full-duplex 100BASE-TX transceivers supporting 100 Mbps operation. It includes an EtherCAT slave controller with 4K bytes of Dual Port RAM (DPRAM), three Fieldbus Memory Management Units (FMMUs), and four SyncManagers. The device supports HP Auto-MDIX and 100BASE-FX via external fiber transceivers. Host interfaces include an 8/16-bit multiplexed bus, indexed register access, and SPI/Quad SPI. It operates on a single 3.3V supply using an integrated 1.2V regulator, with I/O voltages ranging from 1.8V to 3.3V. The component is housed in a 64-pin QFN package and rated for industrial temperatures from -40°C to +85°C.

Controllers Feature Summary

• Integrated EtherCAT slave controller with distributed clock support for high-precision synchronization
• Dual 100BASE-TX Ethernet PHYs with automatic polarity detection and correction
• Flexible host connectivity via 8/16-bit bus, indexed registers, or SPI/Quad SPI
• Comprehensive power management with multiple wake-on-LAN event triggers

Controllers Applications

• Motor Motion Control
• Process and Factory Automation
• Communication Modules and Interface Cards
• Hydraulic and Pneumatic Valve Systems
• Operator Interfaces

Controllers Procurement Notes

Verify the specific suffix 'I' indicates the industrial temperature range (-40°C to +85°C) and 'ML' denotes the 64-QFN package. Confirm that the internal 1.2V regulator is enabled for standard single-supply operation. Ensure the design accounts for the exposed pad connection to ground as specified in the datasheet thermal requirements.

Controllers Selection Notes

Select this model when industrial temperature stability is required alongside compact QFN packaging. Consider the Digital I/O mode if no local microcontroller is present, allowing direct EtherCAT master control of 16 digital signals. Verify compatibility with the host system's available interface, whether it be parallel bus or serial SPI, to optimize pin count and board space.

Controllers Part Context

The LAN9252 series provides a cost-effective solution for EtherCAT networks by integrating MAC and PHY functions. The 'I' suffix distinguishes the industrial grade variant from commercial versions, ensuring reliability in harsh environments. This controller simplifies system design by reducing the need for external components through its integrated regulators and extensive feature set.

Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material.

Controllers FAQ

How does the LAN9252 handle data exchange between the local application and the EtherCAT master?

It uses four SyncManagers configured by the master. Data can be exchanged in buffered mode, where the buffer always holds the latest data, or mailbox mode, which uses handshakes to guarantee no data loss.

What power supply configuration is supported by the LAN9252I/ML?

The device supports a single 3.3V power supply utilizing an integrated 3.3V to 1.2V linear regulator. The internal regulator may be disabled to allow the use of an external high-efficiency regulator.

Can the LAN9252 operate without a local microcontroller?

Yes, it can operate in Digital I/O Mode, where up to 16 digital signals can be controlled or monitored directly by the EtherCAT master, optimizing system cost for simple modules.