TI no longer manufactures this exact order code, so new-production buys go through independent distribution.
Finding a replacement – pin-compatible options
The closest pin-compatible alternative within the same MSP430G2 family is the MSP430G2231IPW4 (non-Q1 suffix). That variant shares the same 14-TSSOP footprint, 16 MHz core, 2 KB Flash, and 128 x 8 RAM, but drops the AEC-Q100 automotive qualification. If your application does not require the Q1 grade, the non-Q1 part is a direct drop-in.
16 MHz, 2 KB Flash – sizing the firmware budget
The 16 MHz CPU16 core is adequate for simple sensor polling, I²C/SPI communication, and PWM generation. The 2 KB Flash fills a tight firmware footprint – think a single control loop with a lookup table, not a multi-layer protocol stack. The 128 x 8 RAM (128 bytes) limits stack depth and variable storage; any significant buffering or floating-point math will overflow.
Sourcing the MSP430G2231IPW4Q1 now
Because this part is obsolete, the usual franchised channels will not carry it. Independent distributors hold whatever surplus remains – typically pulled from overstock or cancelled orders. If you need a large volume or a specific date code, expect to work with a broker who can trace the supply chain back to TI's original production.