Automotive-grade 8-bit MCU with 150°C capability
Its operating temperature range extends to 150°C, which puts it in the small group of MCUs that can sit on an engine-mounted PCB or inside a transmission controller without derating. The core runs at 16 MHz, and the 32 KB Flash program memory is paired with 2 KB RAM and 1 KB EEPROM — enough for a body-control module, a LIN-based actuator node, or a sensor-fusion hub that logs calibration data to the EEPROM.
Memory and connectivity for automotive subnets
The 1 KB EEPROM is a separate block from Flash, not emulated — useful for storing fault codes, trim values, or VIN fragments without wearing the program memory. The 7-channel 10-bit ADC covers analog sensor inputs like throttle position or thermistor lines. On the serial side, the part includes I²C, SPI, LINbus, and UART/USART interfaces. LIN is the typical choice for low-cost automotive subnets (window lift, seat control), while I²C and SPI handle on-board sensor or memory communication.
Package and supply range
Housed in a 32-UFQFPN with an exposed pad (5x5 mm), the STM8AF6266UDX is a surface-mount device meant for reflow assembly. The 25 I/O lines, combined with the internal oscillator and built-in brown-out reset, POR, PWM, and watchdog peripherals, reduce external component count.