16 MHz MSP430 — the low-power workhorse in a 4×4 mm QFN
The MSP430G2252IRSA16R runs at 16 MHz with 2 KB of Flash and 256 bytes of RAM.
Industrial temperature and integrated peripherals
The 8-channel, 10-bit ADC handles analog sensor inputs directly, and the USI module supports I²C or SPI communication with a single serial interface block.
256 bytes of RAM — plan the stack and buffers carefully
The 256 × 8 RAM is the tightest resource on this part. A firmware engineer needs to account for the call stack, interrupt context saves, and any I²C or SPI transmit/receive buffers within that budget.
With 10 general-purpose I/O pins on a 16-pin package, the MSP430G2252IRSA16R leaves six pins for power, ground, and the exposed thermal pad. The I/O count is enough for a few sensor inputs, a serial bus, and a couple of control outputs, but any design needing more than 10 GPIOs should look at the higher-pin-count variants in the MSP430G2xx family.
There is no NRND notice, no last-time-buy window, and no announced obsolescence.