Supply range and peripheral set
On-chip peripherals include a 10-bit ADC with 28 channels, two 10-bit DACs, PWM, brown-out detect, power-on reset, and a watchdog timer.
Memory footprint and firmware scope
With 7 KB of Flash and 512 bytes of RAM, the memory is tight. The 512-byte RAM is enough for a modest FIFO buffer and a handful of variables — plan the firmware around that constraint from the start.
Package and assembly
The 40-pin PDIP (0.600" body width, 15.24 mm lead spacing) is a standard through-hole footprint. The through-hole format also makes this part easy to socket for field upgrades or rework.
It is ROHS3 compliant.