LAN9253T/R4X

Controllers Overview

The LAN9253T/R4X is an EtherCAT device controller manufactured by Microchip Technology. It integrates dual Ethernet PHYs, each providing a full-duplex 100BASE-TX transceiver supporting 100 Mbps operation. The device functions as a 3-port EtherCAT slave controller equipped with 8KB dual-ported RAM (DPRAM), eight SyncManagers, and eight Fieldbus Memory Management Units (FMMU). It features a 64-bit distributed clock for synchronization and supports HP Auto-MDIX. Interfaces include SPI/SQI, HBI, GPIO, and MDI/MDI-X connections.

Controllers Feature Summary

• Dual integrated Ethernet PHYs with full-duplex 100BASE-TX transceivers
• Integrated 3-port EtherCAT slave controller with 8KB DPRAM
• Supports HP Auto-MDIX for flexible cabling configurations
• Includes 64-bit distributed clock for high-precision synchronization

Controllers Applications

• EtherCAT device solutions in industrial automation
• Servo drives and stepper motor controllers
• Input/output modules for control systems

Controllers Procurement Notes

Verify the specific suffix R4X against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure compatibility with system voltage requirements of 3.3V. Confirm lead times and availability directly with authorized distributors as supply conditions vary. Validate that the ordering part number matches the required pinout and functional specifications for the target application design.

Controllers Selection Notes

Select this component when a cost-effective EtherCAT slave solution with integrated PHYs is required. It is suitable for applications needing dual ports or a third port via MII expansion. Consider the 8KB DPRAM capacity for process data buffering needs. Verify interface compatibility with the host microcontroller, specifically SPI or HBI modes, before finalizing the design.

Controllers Part Context

The LAN9253 belongs to Microchip's EtherCAT device controller family, designed for industrial networking. It complements other LAN925x series chips like the LAN9252 and LAN9254, offering enhanced memory and feature sets compared to earlier generations. This series is widely used in mature industrial markets for reliable real-time communication.

Controllers Replacement Considerations

Publicly documented alternatives include the FCE1353 from Fangxin Semiconductor, which offers pin-to-pin compatibility with the LAN9253. Verify electrical characteristics and software driver support before substituting.