8-bit MCU for battery-life-critical designs
It runs at 16 MHz and packs 8 KB of Flash program memory, 1 KB of RAM, and 256 bytes of EEPROM in a 20-pin TSSOP package.
Memory and peripherals — what fits in 8 KB
With 8 KB of Flash and 1 KB of RAM, this is a part for focused control tasks, not a Linux-class application processor.
Temperature range and supply — industrial and portable fit
The 18 general-purpose I/O pins in the 20-TSSOP package give reasonable headroom for a small sensor node with a few external components.
Lifecycle — confirmed active, no obsolescence concern
For a new design or an existing BOM line, there is no last-time-buy clock ticking. ST continues to manufacture the EnergyLite series, so supply through the independent distribution channel is stable.