16 MHz 16-bit core with 2 KB Flash — what it fits
The MSP430G2221IN14: The 14-pin DIP package (14-DIP, 0.300" width) keeps the BOM cost low and suits through-hole assembly, prototyping, or designs where SMT reflow is not available.

Texas Instruments MSP430G2xx series 16-Bit Microcontroller, MSP430 CPU16 core, 16MHz, 2KB Flash, 128 x 8 RAM, 10 I/O, I²C/SPI, 14-DIP, -40°C to 85°C, Tube.
| Parameter | Value |
|---|---|
| Series | MSP430G2xx |
| Mounting | Through Hole |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.8V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 16MHz |
| Package | Tube |
| RAM size | 128 x 8 |
| Core size | 16-Bit |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | I²C, SPI |
| Number of i (O) | 10 |
| Core processor | MSP430 CPU16 |
| Case | 14-DIP (0.300\", 7.62mm) |
| Program memory size | 2KB (2K x 8) |
The MSP430G2221IN14: The 14-pin DIP package (14-DIP, 0.300" width) keeps the BOM cost low and suits through-hole assembly, prototyping, or designs where SMT reflow is not available.
Within the same 14-pin DIP footprint, the MSP430G2231 is a pin-compatible upgrade that offers 2 KB Flash and 128 B RAM like the G2221, but adds a 10-bit ADC and a larger peripheral set. The G2221 omits the ADC, which may be the deciding factor if analog sampling is not needed.