This means STMicroelectronics will continue to support existing production programs for a defined window, but the part is no longer being qualified into new automotive ECU builds. For a new design, this part is not the starting point.
AEC-Q100 grade and the 125°C ceiling
That 125°C upper limit is the junction temperature for under-hood and engine-bay deployments — think engine control modules, transmission controllers, and body-domain nodes that sit near the exhaust or the radiator. The 3V to 5.5V supply range means it can run directly off a nominal 5V automotive rail or a 3.3V regulated supply without an extra level shifter.
24 MHz core, 64 KB Flash, 6 KB RAM — what fits
The 2 KB of EEPROM (2K x 8) is useful for storing calibration tables and fault codes without wearing the Flash. The 7-channel 10-bit ADC covers basic analog inputs — throttle position, temperature, pressure — without an external converter.
The connectivity block covers I²C, LINbus, SPI, and UART/USART, which covers the common in-vehicle serial buses. The 25 I/O lines in the 32-LQFP package (7x7 mm body) leave enough headroom for a small keypad, a few LED indicators, and the bus transceiver interface.