80 MHz core and 512 KB Flash — what they mean for a replacement search
That places it in the mid-range Cortex-M3 tier — enough throughput for a motor drive with CANopen and a USB host stack running concurrently, but not the high-end 120 MHz+ parts. The 64-LQFP package with 33 I/O and an 8-channel 12-bit ADC means the pinout and analog channel count are constraints you'll need to match in any pin-compatible replacement.
For a board that needs this exact MCU — whether it's a legacy controller in the field or a repair requiring the same firmware image — the supply path is the independent distribution market. No official replacement part number has been published by TI for this specific variant, so a pin-compatible swap would require validating a different Stellaris or a third-party Cortex-M3 with the same 64-LQFP footprint and peripheral map.
Industrial temperature grade and 3V–3.6V supply rail
The supply range of 3V to 3.6V means it runs on a single 3.3V rail — common for mixed-signal boards — and integrates a brown-out detect and POR to handle power-up sequencing cleanly.