Polyphase metering MCU with seven 24-bit sigma-delta ADCs
The Texas Instruments MSP430F6779AIPEU is a 16-bit MCU built around the MSP430 CPUXV2 core running at 25 MHz, with 512 KB of Flash program memory and 32 KB of RAM. Its defining feature is the set of seven 24-bit sigma-delta analog-to-digital converters — purpose-built for polyphase energy metering, power-quality monitoring, and multi-channel sensor acquisition where simultaneous sampling matters. The 90 general-purpose I/O lines and connectivity options including I²C, SPI, UART/USART, IrDA, and LINbus give it the reach to interface with metrology AFEs, communication modules, and display controllers in a single-chip design.
What the key ratings mean for the BOM
The 25 MHz core speed runs real-time energy calculations across three phases plus neutral without a separate DSP.
Where it fits — industrial metering and control
Rated for -40°C to 85°C operation, the MSP430F6779AIPEU is suited for outdoor meter enclosures, substation monitoring panels, and factory-floor power-quality instruments. The internal oscillator keeps the BOM lean — no external crystal needed for basic operation. The 128-LQFP package (20×14 mm) is a standard footprint for this class of mixed-signal MCU, routable on a four-layer PCB with the analog and digital domains separated.
Sourcing and lifecycle note
The lifecycle record shows an end-of-life (EOL) status alongside an active status entry — a discrepancy that means the part may be in its last production window or already phased out by Texas Instruments. No official successor order code is listed. For a BOM line that depends on this exact MCU, the sourcing posture is clear: it is sourced and quoted to order against an RFQ through independent distribution, with availability and current pricing confirmed at quote time. Plan for a last-time-buy if a production run is still open, or evaluate a pin-compatible migration path within the MSP430F6xx family.