Active production — still a current BOM line
The MSP430F2001IRSAR: This is a current-production part you can still design into a new board or reorder for an existing BOM without worrying about a sunset date.
16 MHz MSP430 CPU16 — what the clock buys you
The 16 MHz core clock drives the MSP430 CPU16 — a 16-bit RISC architecture that executes most instructions in a single cycle. At 16 MHz the throughput is roughly 16 MIPS, enough for real-time sensor polling, simple control loops, and serial communication without an external oscillator (the internal oscillator is on-chip,). The 1 KB Flash and 128 x 8 RAM are the hard firmware budget. A typical application — read an analog sensor via the slope A/D, drive a PWM output, and toggle a few GPIOs — fits in under 512 bytes of code, leaving room for a small state machine. Anything needing a full protocol stack or data logging will overflow this part; that is where the larger MSP430F2xx siblings come in.
Supply range and temperature grade — deployment envelope
The brown-out detect (BOD) and power-on reset (POR) peripherals keep the core from executing garbage during supply ramp-up or dip — critical for battery-powered gear that sees intermittent connection. Industrial temperature grade -40°C to 85°C qualifies it for outdoor sensor nodes, HVAC controllers, and automotive cabin-adjacent modules.
The 16-VQFN Exposed Pad measures 4 mm × 4 mm with a 0.65 mm pitch.