256 B RAM and 8 KB Flash — sizing the firmware and data budget
The 8 KB Flash (8K x 8 plus 256 B information memory) holds the application code and fixed lookup tables. 256 B of RAM is tight — enough for a few sensor readings, a small state machine, and a communication buffer. This part is sized for simple control tasks like a thermocouple digitizer or a pulse counter, not for data logging or complex protocol stacks.
On-chip ADC and peripherals — reducing BOM count
The 8-channel, 10-bit ADC samples analog inputs directly, eliminating an external converter in many designs. The internal oscillator further saves a crystal in non-timing-critical applications.
20-TSSOP — surface-mount footprint for compact boards
Housed in a 20-lead TSSOP (4.40 mm wide body), this MCU fits on tight two-layer PCBs common in handheld or embedded sensor modules. The 0.65 mm pitch requires standard SMT assembly; no fine-pitch rework needed.
No last-time-buy notice or obsolescence timeline has been issued.