Polyphase metering MCU with seven 24-bit sigma-delta channels
The Texas Instruments MSP430F67761AIPEU is a 16-bit MCU from the MSP430F6xx series, built around the MSP430 CPUXV2 core running at 25 MHz. It packs 256 KB of Flash and 16 KB of RAM, with 90 I/O lines in a 128-LQFP package. The standout feature is the seven 24-bit sigma-delta analog-to-digital converters — purpose-built for polyphase energy metering, where each phase plus neutral gets its own dedicated converter channel. An integrated LCD controller drives segment displays directly, and the hardware multiplier (MAC) accelerates the arithmetic for active/reactive power calculations.
What the 25 MHz core and 7×24-bit ADC mean for the BOM
The 25 MHz clock rate supports continuous data streaming from the seven sigma-delta converters. The CPUXV2's hardware multiplier keeps per-sample math from bogging down the main loop.
Lifecycle and sourcing reality
The MSP430F67761AIPEU is marked end-of-life (EOL) in the lifecycle record. For existing BOM lines, this part is sourced through independent distribution on a quoted-to-order basis.