The STM32G031C6U6 is an STMicroelectronics 32-bit microcontroller built around the ARM Cortex-M0+ core, clocked at 64 MHz. The 12-bit SAR ADC with 19 multiplexed channels covers multi-sensor acquisition — think thermocouple, current shunt, and position feedback on one chip. This is the entry-density member of the STM32G0 family, so if your firmware outgrows 32 KB, the pin-compatible STM32G031C8U6 (64 KB Flash) is a drop-in swap — same footprint, same peripheral set, just more code space.
At 64 MHz, this core executes most instructions in a single cycle, so a PID loop running at 10 kHz with 16-bit coefficients finishes in under 2 µs. The 8 KB SRAM is tight — budget about 4 KB for the stack and critical variables, leaving 4 KB for data buffers. If your application needs double that, the STM32G031C8U6 sibling doubles the RAM to 16 KB while keeping the same 64 MHz ceiling.
Use at least four thermal vias (0.3 mm drill, filled) connecting the pad to an inner ground plane.