16-bit MSP430 at 8 MHz — what the specs mean for your BOM
The Texas Instruments MSP430F112IDW is a 16-bit MCU built around the MSP430 CPU16 core, clocked at 8 MHz from an internal oscillator. It carries 4 KB of Flash program memory and 256 bytes of RAM — enough for a single sensor polling loop, a periodic wake-and-log routine, or a simple state machine, but not for data buffering or protocol stacks. The 14 I/O lines, POR, PWM, and WDT peripherals cover basic control and timing tasks without external glue logic. Supply range spans 1.8 V to 3.6 V, so it runs directly off a single Li-ion cell or two alkaline batteries — no external regulator needed. The -40°C to 85°C operating range qualifies it for industrial enclosures, outdoor telecom cabinets, and unheated factory-floor equipment. Packaged in a 20-SOIC (7.50 mm wide) surface-mount body, it fits standard pick-and-place lines and reflow profiles. The 20-SOIC footprint is common across the MSP430x1xx series.