What this part is
The LM3S8G62-IQC80-A2T: 32-bit ARM Cortex-M3 MCU from the Stellaris 8000 series, running at 80 MHz with 384 KB Flash and 64 KB SRAM. Includes a 16-channel 12-bit ADC, motor-control PWM, and CAN plus Ethernet MAC+PHY.
80 MHz is the sweet spot for a Cortex-M3 handling both protocol stacks and control loops. The Ethernet MAC and CAN controller can run without stealing cycles from the motor-control PWM or the ADC sampling — the DMA engine handles peripheral-to-memory transfers independently, so the core stays free for application code.
Connectivity set for industrial networking
One chip replaces a separate Ethernet controller, CAN transceiver, and UART expander.
Texas Instruments has marked the LM3S8G62-IQC80-A2T as obsolete. No last-time-buy window remains through the factory channel.