16 MHz core, 2 KB Flash — what fits in that memory envelope
The 256 x 8 RAM is the tightest constraint in the memory map. A design that needs a large frame buffer, multi-packet serial queues, or a real-time OS will hit the ceiling quickly. This part fits best in applications where the firmware stays under 1.5 KB and the stack plus a few global variables fit in the remaining RAM — think a temperature monitor reporting over I²C, a PWM fan controller, or a simple keypad scanner.
Industrial temperature grade and on-chip peripherals
With 16 I/O lines in a 20-TSSOP package, it leaves room for a few external passives and a connector.
It is ROHS3 compliant.
