Active production, wide temperature range — the STM8L151R8T3 for harsh environments
The 64 KB Flash (64K x 8) holds the application code; the 2 KB EEPROM (2K x 8) is useful for calibration constants, configuration parameters, or fault logs that survive power loss without external memory. The 4 KB RAM (4K x 8) supports moderate data buffers for protocol stacks or sensor fusion. For designs that need field-updatable firmware, the Flash block size and write endurance should be checked against the OTA strategy — the datasheet's programming section covers the specifics.
On-chip peripherals include brown-out detect, power-on reset, a watchdog timer, DMA, and an internal oscillator — reducing external BOM count.
Package and I/O — 64-LQFP with 54 GPIO
The LQFP footprint is standard for mid-density MCUs and reflows well with typical lead-free profiles.