LAN9254/JRX

The LAN9250/ML is a full-featured, single-chip 10/100 Ethernet controller designed for embedded applications where performance,flexibility, ease of integration and system cost control are required. The LAN9250/ML has been specifically designed to provide high performance and throughput for 16-bit applications. The LAN9250/ML complies with the IEEE802.3 (full/half-duplex 10BASE-T and 100BASE-TX) Ethernet protocol, IEEE 802.3az Energy Efficient Ethernet (EEE)(100Mbps only), and the IEEE 1588v2 precision time protocol. 100BASE-FX is supported via an external fiber transceiver.The LAN9250/ML includes an integrated Ethernet MAC and PHY with a high-performance SRAM-like slave interface. For additional design flexibility SPI and SQI interfaces are also supported. The integrated checksum offload engines enable the automatic generation of the 16-bit checksum for received and transmitted Ethernet frames, offloading the task from the CPU. The LAN9250/ML also includes large transmit and receive data FIFOs to accommodate high latency applications. In addition, the LAN9250/ML memory buffer architecture allows highly efficient use of memory resources by optimizing packet granularity. The LAN9250/ML also supports features which reduce or eliminate packet loss. The internal 16-KByte SRAM can hold over 200 received packets. If the receive FIFO gets too full, the LAN9250/ML can automatically generate flow control packets to the remote node, or assert back-pressure on the remote node by generating network collisions.The LAN9250/ML can be configured to operate via a single 3.3V supply utilizing an integrated 3.3V to 1.2V linear regulator.The linear regulator may be optionally disabled, allowing usage of a high efficiency external regulator for lower system power dissipationMicrochip's complimentary and confidential LANCheck® online design review services are available for customers who have selected our products for their application design-in*.*The LANCheck online design review service is subject to Microchip's Program Terms and Conditions and requires a myMicrochip account.

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