It runs at 16 MHz from an internal oscillator, with 8 KB of Flash program memory, 1 KB of SRAM, and 640 bytes of EEPROM — enough for a body-control module, LIN slave node, or sensor hub that does not need a full 32-bit core. The peripheral set includes I²C, LINbus, SPI, and UART/USART, plus a 5-channel 10-bit ADC, PWM, brown-out reset, and a watchdog timer, all in a 20-pin TSSOP package.
That means ST still manufactures it for existing production, but they will not qualify it into new platforms. For a new design, the official recommendation is to evaluate a current-production STM8A or STM8L alternative with a similar peripheral set and pin count.
16 MHz core, 8 KB Flash — sizing the headroom
The 16 MHz clock rate is typical for an 8-bit MCU handling LIN messaging, switch debouncing, or PWM generation at a few kilohertz. The 1 KB SRAM is tight for buffering more than a few CAN/LIN frames; plan your RAM budget around that limit.
20-TSSOP footprint and supply range
With 16 I/O lines, you get enough pins for a few sensor inputs, a LIN transceiver interface, and a couple of LED or relay drivers.