The STMicroelectronics STM8L050J3M3 is an 8-bit MCU from the STM8L EnergyLite family, built around the STM8 core running at 16 MHz. It packs 8 KB of Flash program memory, 1 KB of RAM, and 256 bytes of EEPROM into an 8-pin SOIC package, with 6 general-purpose I/O lines.
Memory and I/O — sizing the firmware and the bill of materials
The 256-byte EEPROM is a differentiator: it stores calibration constants or configuration parameters without needing an external serial EEPROM, saving a component and a board trace. The 1 KB RAM handles a modest stack and a handful of buffers. With only 6 I/O pins, every pin counts — the designer must multiplex functions (I²C, SPI, UART, PWM, ADC) across the available package pins, which the peripheral set supports.
Temperature grade and supply tolerance — deployment context
That wide window can eliminate a dedicated voltage regulator on cost-sensitive boards.
ST lists the STM8L050J3M3 as an active product with ROHS3 compliance.