16 MHz MSP430 core in a through-hole DIP
It carries 16KB of Flash program memory and 512 x 8 of RAM, enough for small sensor nodes, control loops, and serial-bridge applications. On-chip peripherals include a 10-bit ADC with 8 multiplexed channels, brown-out detect and reset, a POR circuit, DMA, PWM timers, and a watchdog timer.
The supply range spans 1.8V to 3.6V, letting it run from a single Li-ion cell or a 3.3V regulated rail without an extra LDO. Brown-out detect and POR are integrated, so the reset circuitry is self-contained — no external supervisor needed for basic power-fail handling.