Polyphase metering MCU with on-chip sigma-delta and LCD drive
The Texas Instruments MSP430F67481AIPEU is a 16-bit MSP430 CPUXV2 microcontroller clocked at 25 MHz, packing 256 KB of Flash and 32 KB of RAM. Its defining peripheral set — four 24-bit sigma-delta ADCs, an LCD driver, and a 10-bit SAR ADC — targets polyphase energy metering and industrial instrumentation where multiple high-resolution analog channels must be digitised simultaneously and displayed locally.
The 25 MHz CPU clock drives the four 24-bit sigma-delta modulators. The internal oscillator provides the timing.
Active lifecycle — no LTB flag, but monitor PCNs
TI lists the MSP430F67481AIPEU as Active. That means it is still a valid BOM line for new production and field spares. The MSP430F6xx family is mature, so while there is no imminent last-time-buy, a sourcing buyer should watch for package-migration or wafer-fab PCNs that could affect long-term form-fit-function continuity.
Package and pinout — 128-LQFP (20×14 mm)
The 128-LQFP has a 20×14 mm body.