LAN9254 Series

Microchip’s LAN9254 is a 3 port EtherCAT device controller (ESC) with dual integrated Ethernet PHYs which each provide a full-duplex 100BASE-TX transceiver and support 100Mbps (100BASE-TX) operation. The LAN9254 supports HP Auto-MDIX, allowing the use of direct connect or cross-over LAN cables. This device provides system developers a cost-effective solution for realizing EtherCAT device solutions. The LAN9254 includes a 3 port EtherCAT device controller with 8K bytes of Dual Port memory (DPRAM), 8 SyncManagers, 8 Fieldbus Memory Management Units (FMMUs) and a 64-bit Distributed Clock. This device includes feature additions over LAN9252 and LAN9253 which answer our customers' requests for enhanced cycle time, additional IO channels, integration and system level cost savings. It supports multiple Process Data Interfaces - SPI/SQI, HBI and Digital IO. SPI and SQI (high speed SPI) provide a low pin count synchronous device interface that facilitates communication between the device and a host system. Whereas, the Host Bus Interface facilitates the same via a high-speed asynchronous device interface. For simple digital modules without micro-controllers, the LAN9254 can also operate in Digital I/O Mode where 32 digital signals can be controlled or monitored by the EtherCAT master. LAN9254 also supports a fully de-multiplexed host interface The LAN9254 can be configured to operate via a single 3.3V supply utilizing an integrated 3.3V to 1.2V linear regulator. The internal linear regulator may also be disabled, allowing usage of a high efficiency external regulator for lower system power dissipation. The LAN9254 is available in commercial, industrial and extended industrial temperature ranges and is packaged in 80 pin TQFN. Microchip's complimentary and confidential [MicroCHECK](https://www.microchip.com/en-us/support/design-help/design-check-services) design review service, which offers insight from the initial concept to the final PCB layout, is available to customers who are using our products in their projects. You can confidently submit your design materials in a secure and private setting, and our expert engineers will provide individualized feedback to enhance your design. MicroCHECK design review service is subject to Microchip's [Program Terms and Conditions](https://www.microchip.com/en-us/support/design-help/design-check-services/design-check-services-program-terms-and-conditions) and requires a myMicrochip account.