The Texas Instruments LM3S8738-IQC50-A2T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris® ARM® Cortex®-M3S 8000 series, clocked at 50 MHz with 128 KB of Flash program memory and 64 KB of SRAM. The part is rated for -40 to 85°C industrial temperature environments and operates from a 2.25 V to 2.75 V supply, packaged in a 100-LQFP (14x14 mm) footprint.
50 MHz Cortex-M3 — enough for a protocol bridge
It is not a high-throughput DSP or a multi-protocol router, but it handles a single CANopen or Modbus TCP stack plus local sensor polling without hitting the bus. The 38 GPIOs, 8-channel 10-bit ADC, and internal oscillator reduce external BOM count for a compact control board.
Texas Instruments has marked the LM3S8738-IQC50-A2T as obsolete. No official successor is listed in the Stellaris family.