Core and memory — what the 80 MHz Cortex-M3 buys you
The LM3S5651-IQC80-C0T: That processing headroom handles a real-time control loop plus a protocol stack (USB or CAN) without starving the data buffer.
Connectivity and peripherals — CAN, USB OTG, and more
This part integrates CANbus, USB OTG, I²C, SPI, UART/USART, IrDA, LINbus, Microwire, SSI, and QEI — enough serial interfaces to bridge a motor drive to a fieldbus gateway or aggregate sensor data over a USB link. On-chip peripherals include a brown-out detect/reset, DMA controller, I²S audio interface, POR, PWM outputs, and a watchdog timer. The 16-channel 10-bit ADC samples analog inputs without an external converter.
Package, temperature, and board integration
Rated for -40 to +85°C industrial temperature operation, it suits factory-floor controllers, outdoor telemetry gateways, and under-hood automotive modules (where the rest of the BOM also meets that grade).
Texas Instruments lists this part as Obsolete.