The LM3S5K36-IQR80-C0: 32-bit ARM Cortex-M3 microcontroller from the Stellaris 5000 series. Runs at 80 MHz, carries 128 KB Flash and 24K x 8 SRAM, includes CAN and USB.
80 MHz Cortex-M3 — what it means for the control loop
80 MHz core clock. 128 KB Flash is sized for mid-complexity firmware.
Industrial temperature grade and package
Rated for -40°C to 85°C ambient. 64-pin LQFP (10x10 mm body). 33 GPIOs.
Lifecycle: obsolete — sourcing reality
Texas Instruments has marked the LM3S5K36-IQR80-C0 as obsolete. No official direct replacement listed. Available through independent distribution on a sourced-to-order basis.