The MSP430F67661AIPZR: The standout feature is the integrated six-channel 24-bit sigma-delta analog-to-digital converter, purpose-built for polyphase energy metering and precision measurement applications that require simultaneous sampling on multiple phases.
The sigma-delta ADC is the differentiator
Six independent 24-bit sigma-delta converters let this part sample voltage and current on three phases plus neutral in a single cycle — no external multiplexing or phase-skew compensation. The 25 MHz core has enough headroom to run the metrology algorithms and communication stacks without a second processor.
Memory and peripheral mix for a metering BOM
The integrated LCD driver eliminates a separate display controller, and the DMA engine moves ADC results to RAM without CPU intervention. Brown-out reset and POR are on-chip, reducing external supervisor IC count.
That means no end-of-life notice is in effect, and the part is still supported for new design-ins. For production planning, this removes the single-source urgency that comes with NRND or obsolete parts — though as with any active IC, lead-time variability can tighten during allocation cycles. We source through franchised and independent channels and confirm availability at quote time.