Texas Instruments MSP430F67791AIPEUR

Overview

MSP430F67791AIPEUR from Texas Instruments is a polyphase metering SoC designed for high-accuracy 3-phase electricity meters. It integrates seven 24-bit sigma-delta ADCs (±0.1% accuracy over 2000:1 dynamic range), a 25-MHz CPU with 32-bit multiplier, 512KB flash/32KB RAM, LCD controller (320 segments), and dual eUSCI_A/B interfaces for UART/I²C/SPI. It meets ANSI C12.20 and IEC 62053 standards in utility-grade energy measurement systems.

For engineers reviewing the MSP430F67791AIPEUR datasheet, MSP430F67791AIPEUR pinout, MSP430F67791AIPEUR application, or MSP430F67791AIPEUR equivalent, key selection criteria include its 7-channel SD24_B ADC architecture, RTC with tamper detection, pulse output pins for active/reactive energy calibration, ultra-low-power LPM3.5 mode (0.34 µA), and 128-pin LQFP package with 90 GPIOs.

Technical Context

The MSP430F67791AIPEUR implements a dedicated metrology subsystem with independent 24-bit sigma-delta modulators per phase-supporting simultaneous voltage/current sampling across three phases plus neutral. Its SD24_B module includes digital phase correction, temperature-compensated gain calibration, and 4-quadrant power computation logic.

Digital subsystem features include three-channel DMA for zero-CPU-overhead ADC data transfer, hardware CRC-16 for firmware integrity, four 16-bit timers with nine capture/compare registers, and six eUSCI modules (four UART/IrDA/SPI + two SPI/I²C) enabling concurrent HAN, PLC, and optical port communication in smart meter designs.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, thermally enhanced for metering applications requiring long-term stability under thermal cycling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar polyphase metering applications.

Compared with MSP430F67781AIPEUR and MSP430F67691AIPEUR, the MSP430F67791AIPEUR uniquely supports full 3-phase 4-wire metrology with neutral current, tamper-secure RTC, and 32KB RAM for extended waveform buffering - making it the only option for Class 0.2 revenue meters requiring DLMS/COSEM compliance and 10-year battery-backed timekeeping.

Availability

MSP430F67791AIPEUR is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade submetering, and grid-edge power quality monitoring requiring stable component supply and long-term lifecycle support.

Supply support for MSP430F67791AIPEUR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The MSP430F67791AIPEUR belongs to TI's Metrology and Monitoring MCU portfolio - engineered specifically for ANSI/IEC-compliant energy measurement with integrated sigma-delta ADCs, secure RTC, and ultra-low-power operation.

FAQ

What is the maximum sampling rate supported by the SD24_B module in MSP430F67791AIPEUR?

The SD24_B module in MSP430F67791AIPEUR supports up to 8 kSPS per channel with oversampling and digital filtering. This enables high-fidelity waveform capture for harmonic analysis up to the 50th order at 70 Hz line frequency - a requirement for IEEE 519-2022 power quality compliance. The MSP430F67791AIPEUR uses this capability to perform real-time THD and flicker calculations without external processors.

Does MSP430F67791AIPEUR support automatic calibration for current transformers?

Yes, MSP430F67791AIPEUR includes hardware-accelerated digital phase correction for current transformers, compensating for phase shift across temperature and load. Its Energy Measurement Software Library provides automated CT calibration routines that adjust gain and phase coefficients in real time using known reference signals - eliminating manual potentiometer tuning. This feature is integral to achieving <0.1% accuracy in the MSP430F67791AIPEUR.

How does MSP430F67791AIPEUR handle power loss during metering operations?

MSP430F67791AIPEUR supports seamless transition to backup power via its flexible supply architecture: it automatically switches between AC mains, supercapacitor, and coin-cell sources while maintaining RTC operation and volatile register state. In LPM3.5 mode, it draws only 0.34 µA - enabling >10 years of timekeeping on a CR2032. Critical energy data is preserved in RAM during brownout, and the MSP430F67791AIPEUR resumes metrology within 5 µs upon power restoration.

Can MSP430F67791AIPEUR drive a 320-segment LCD directly without external bias circuitry?

Yes, MSP430F67791AIPEUR integrates a programmable LCD controller supporting static, 2-, 3-, and 4-mux configurations with internal charge pump and contrast control. It drives up to 320 segments directly using COM0–COM7 and SEGx pins - no external resistors, capacitors, or voltage dividers needed. The MSP430F67791AIPEUR's LCDCAP pin simplifies external capacitor selection for stable bias generation.

What communication protocols are natively supported by the eUSCI modules in MSP430F67791AIPEUR?

MSP430F67791AIPEUR includes six eUSCI modules: four eUSCI_A units support UART, IrDA, and SPI; two eUSCI_B units support SPI and I²C. These enable concurrent implementation of optical port (IrDA), PLC modem (SPI), HAN radio (UART), and secure bootloader (I²C). All protocols execute in hardware - freeing the CPU for metrology tasks. The MSP430F67791AIPEUR's peripheral mapping allows full protocol stack execution without resource contention.