The STMicroelectronics STM8AL3146TAY is an 8-bit MCU from the STM8A series, built around the STM8 core and clocked at 16 MHz. It packs 16 KB of Flash program memory, 2K x 8 of RAM, and 1K x 8 of EEPROM — enough for moderate control loops and parameter storage without external memory. The 32-LQFP package (7x7 mm) gives you 30 I/O lines, plus a 22-channel 12-bit ADC and a single 12-bit DAC, which is unusual analog density for an 8-bit part in this footprint.
That means ST has flagged it for eventual phase-out — no new production builds should start with this MCU. Existing designs already qualified on the STM8AL3146TAY can continue through the last-time-buy window, but the clock is running. For new projects, you need a pin-compatible or functionally equivalent replacement within the STM8A family.
16 MHz core and peripheral timing
The 16 MHz clock comes from an internal oscillator, so no external crystal is needed for the core — good for BOM simplification. The Flash program memory runs at 16 KB, and the 1K x 8 EEPROM is separate from the program space, which means you can store calibration constants or configuration data without wearing out the Flash. The 2K x 8 RAM is tight for buffer-heavy applications; if your firmware uses large frame buffers or multi-level stacks, budget carefully.
Analog and connectivity in a 32-pin package
With 22 analog inputs on a 12-bit ADC and one 12-bit DAC, this MCU can handle multi-channel sensor acquisition and generate an analog output without an external converter — useful for closed-loop control in automotive actuators or industrial set-point generation. The LINbus interface targets automotive body networks (door modules, seat controllers, lighting).