It runs at 16 MHz from an internal oscillator, with 64 KB of program Flash, 4 KB of RAM, and 2 KB of EEPROM on a single die. The 80-LQFP package gives you 68 I/O lines, plus a 28-channel 12-bit ADC and two 12-bit DACs — enough analog front-end to handle multiple sensor inputs without external muxes or signal-conditioning ICs.
NRND — plan the last-time buy now
That means STMicroelectronics is not accepting new design-ins, and volume availability will taper as the last-time-buy window closes. For an existing BOM that already qualifies this MCU, secure your final production run through a qualified independent distributor who can quote against an RFQ and confirm current availability.
The 125°C upper limit covers engine-bay and brake-system modules; the -40°C low end handles cold-start in northern climates. If your design lives in a temperature-controlled cabinet, a commercial-grade STM8 variant may save cost, but for anything that sees the elements, this part is the right reliability tier.