The Texas Instruments MSP430F6777AIPZR is a 16-bit microcontroller from the MSP430F6xx family, built around the CPUXV2 core running at 25 MHz. The standout feature is the seven 24-bit sigma-delta ADCs on-chip, purpose-built for polyphase power measurement where you need simultaneous voltage and current sampling per phase. An additional 8-channel 10-bit SAR ADC handles auxiliary inputs like temperature or tamper detection.
At 25 MHz the CPUXV2 can execute a 16×16 multiply-accumulate in a single cycle, which matters when computing active, reactive, and apparent power across three phases every line cycle.
Package and temperature grade — the physical fit
Housed in a 100-pin LQFP (14×14 mm body), surface-mount only.