The Texas Instruments LM3S6730-EQC50-A2 is a 32-bit ARM Cortex-M3 MCU from the Stellaris series, clocked at 50 MHz with 128 KB of Flash and 64 KB of RAM. It integrates Ethernet MAC+PHY alongside IrDA, Microwire, SPI, SSI, and UART/USART serial interfaces.
EOL notice — what this means for your BOM
50 MHz core and Ethernet — fit for the application
The 50 MHz Cortex-M3 core delivers enough throughput to run a lightweight TCP/IP stack alongside peripheral control — think Modbus TCP gateway, remote I/O node, or a simple web-server interface on an industrial panel. The integrated Ethernet PHY saves a separate transceiver chip and the associated PCB routing, which matters in the 100-LQFP package where board space is tight. Operating temperature spans -40°C to 105°C, so it can live in an outdoor telecom cabinet or near a motor drive without a heatsink.