Texas Instruments MSP430F67751AIPEUR

Overview

MSP430F67751AIPEUR from Texas Instruments is a polyphase metering SoC designed for high-accuracy energy measurement in 3-phase utility 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, 128KB flash/16KB RAM, LCD controller (320 segments), and six eUSCI interfaces (4 UART/IrDA/SPI + 2 SPI/I²C). It supports ANSI C12.20 and IEC 62053 compliance in smart grid metering applications.

For engineers reviewing the MSP430F67751AIPEUR datasheet, MSP430F67751AIPEUR pinout, MSP430F67751AIPEUR application, or MSP430F67751AIPEUR equivalent, key selection criteria include metrology-grade ADC channel count, RTC tamper detection, pulse output calibration capability, low-power LPM3.5 mode (0.34 µA), and 128-pin LQFP package compatibility with EVM430-F6779 evaluation hardware.

Technical Context

The MSP430F67751AIPEUR implements a dedicated metrology subsystem with independent SD24_B modulators per phase, enabling simultaneous 4-quadrant active/reactive energy calculation and exact phase-angle measurement. Its analog front end supports current transformers, Rogowski coils, and shunt sensors with digital phase correction and temperature-compensated energy computation across 40–70 Hz line frequencies using single-point calibration.

Digital architecture includes three-channel DMA, 16-bit CRC, four 16-bit timers (nine capture/compare registers), and dual power domains (AVCC/DVCC) with automatic supply switching. The device operates from 1.8 V to 3.6 V and retains RTC and critical data during AC mains failure with 3 µA LCD operation in LPM3.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, 0.5 mm pitch, 90 GPIO pins (including 32 LCD segment lines and 8 common lines).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67761AIPEUR, the MSP430F67751AIPEUR offers lower memory cost for fixed-function meters; compared with MSP430F67651AIPEUR, it adds a seventh ADC channel essential for neutral current compliance in ANSI C12.20 3-phase 4-wire installations.

Availability

MSP430F67751AIPEUR 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 industrial lifecycle support.

Supply support for MSP430F67751AIPEUR 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 company delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The MSP430F67751AIPEUR belongs to the MSP430™ Metrology and Monitoring MCU portfolio, engineered specifically for high-accuracy, low-power energy measurement in utility-grade smart meters and grid infrastructure.

FAQ

What metrology standards does the MSP430F67751AIPEUR support out of the box?

The MSP430F67751AIPEUR supports ANSI C12.20 Class 0.2 and IEC 62053-21/22/23 compliance through its hardware-accelerated metrology engine, including 4-quadrant measurement, temperature-compensated energy calculation, and digital phase correction. TI's Energy Measurement Design Center (EMDC) provides pre-validated calibration routines that meet these standards without requiring custom algorithm development for the MSP430F67751AIPEUR.

Does the MSP430F67751AIPEUR include hardware support for tamper detection?

Yes, the MSP430F67751AIPEUR integrates password-protected RTC with dedicated tamper-detect pins (e.g., RTCCLK, TACLK), crystal oscillator monitoring, and voltage glitch detection. These features enable automatic event logging and RTC freeze upon tamper attempt - satisfying IEC 62053-31 Annex B requirements. All tamper responses are implemented in hardware, ensuring deterministic behavior independent of MSP430F67751AIPEUR firmware state.

How many independent analog measurement channels does the MSP430F67751AIPEUR provide?

The MSP430F67751AIPEUR provides seven independent 24-bit sigma-delta ADC channels (SD0–SD6), each with differential inputs and programmable gain. This enables concurrent acquisition of three-phase voltages (VA, VB, VC), three-phase currents (IA, IB, IC), and neutral current (Ineutral) - a full 3-phase 4-wire metrology solution without external multiplexing or additional ADCs.

What is the lowest power consumption mode available on the MSP430F67751AIPEUR with RTC active?

The MSP430F67751AIPEUR achieves 0.34 µA in RTC mode (LPM3.5) at 3 V, retaining real-time clock operation, tamper detection, and 32KB of RAM content while disabling CPU, flash, and most peripherals. This ultra-low current enables >10-year battery life in backup-powered meters and ensures uninterrupted timekeeping during extended AC mains failure - a key design requirement for the MSP430F67751AIPEUR in revenue-critical applications.

Can the MSP430F67751AIPEUR drive a large LCD display without external components?

Yes, the MSP430F67751AIPEUR integrates a full-featured LCD_C peripheral supporting up to 320 segments with internal charge pump, programmable bias generation, and frame frequency control. It requires only external COM/SEG traces and optional contrast-setting resistor - no external LCD driver IC or boost converter is needed. This integrated capability reduces BOM cost and PCB area for the MSP430F67751AIPEUR-based meter designs.