It runs at 16 MHz and packs 2 KB of Flash program memory (2K x 8 plus 256B) with 256 x 8 bytes of RAM — enough for small control loops, sensor readout, and communication protocol handling in battery-operated or power-sensitive designs.
Active lifecycle — no obsolescence worry for new designs
The 28-TSSOP package is a common footprint; rework and replacement at the bench are straightforward with hot-air or soldering-iron methods.
Memory and I/O — sizing the firmware envelope
With 2 KB of Flash and 256 bytes of RAM, the code space is tight. This MCU is suited for small state machines, sensor calibration routines, or simple communication bridges — not for large application stacks or data logging.