128 KB Flash and 6 KB EEPROM — firmware and data storage in one chip
The 6 KB EEPROM is a standout feature for this class: it handles non-volatile storage for calibration constants, device IDs, and logged data, and it is byte-addressable and bit-erasable, so you can update a single parameter without erase cycles on a whole Flash sector. This eliminates the cost and board area of an external serial EEPROM in many designs.
Active lifecycle — no LTB planning needed
The part is ROHS3 compliant.
The 1.65 V minimum supply is the key spec for single-cell battery operation: a fresh alkaline cell at 1.65 V is essentially empty, so the MCU keeps running until the battery is truly drained. If your application needs the full -40 to 125°C automotive range, this part is not that — it is the industrial-grade sibling in the STM32L0 family.
Package and I/O — 64-LQFP with 51 usable pins
Of the 64 pins, 51 are general-purpose I/O, giving a high pin-to-package ratio. The remaining pins are power, ground, and a few dedicated functions (oscillator, reset, debug). The 16-channel 12-bit ADC is available on many of those I/O pins, so a multi-sensor node can read analog signals without external multiplexers.