Texas Instruments MSP430F67751AIPZR

Overview

MSP430F67751AIPZR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring seven independent 24-bit sigma-delta ADCs with <0.1% accuracy over 2000:1 dynamic range, 128KB flash, 16KB RAM, and integrated LCD controller supporting up to 320 segments in utility metering applications.

For engineers reviewing the MSP430F67751AIPZR datasheet, MSP430F67751AIPZR pinout, MSP430F67751AIPZR application, or MSP430F67751AIPZR equivalent, key selection criteria include metrology-grade ADC performance, ANSI C12.20/IEC 62053 compliance, RTC tamper detection, ultra-low-power LPM3.5 mode (0.34 µA), and support for current transformers, Rogowski coils, or shunt-based sensing across three phases plus neutral.

Technical Context

The MSP430F67751AIPZR implements a dedicated metrology subsystem with seven SD24_B modulators feeding independent digital filters, enabling simultaneous high-accuracy voltage and current measurements per phase. Its 25-MHz CPU with 32-bit hardware multiplier executes energy calculations-including active/reactive power, RMS, harmonics, and phase angle-in real time without external co-processing.

It integrates dual-domain power management: analog supplies (AVCC, VASYS) for precision metrology circuits and digital supplies (DVCC, VCORE) for core logic, with automatic switching between AC mains and backup battery. The device supports four-quadrant measurement, digital phase correction for CTs, and temperature-compensated energy computation across 40–70 Hz line frequencies using single-point calibration.

Key Specifications

Pinout & Package

This device is housed in a 128-pin LQFP (PEU) package measuring 20 mm × 14 mm, with 90 general-purpose I/O pins, dedicated metrology analog inputs (SDxP/N), and segregated analog/digital supply domains (AVCC/AVSS, DVCC/DVSS, VASYS/VDSYS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67761AIPZR, the MSP430F67751AIPZR trades flash capacity for lower unit cost while retaining full metrology channel count and accuracy-making it optimal for certified 3-phase meters with fixed-feature firmware. Against MSP430F67651AIPZR, it adds the seventh SD24_B channel essential for true 3-phase + neutral energy accounting.

Availability

MSP430F67751AIPZR is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade submetering, and AMI endpoint node deployments requiring stable component supply, long-lifecycle support, and traceable sourcing for utility-certified designs.

Supply support for MSP430F67751AIPZR 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, embedded processing, and connectivity solutions with emphasis on reliability, precision, and low-power innovation.

The MSP430F67751AIPZR belongs to TI's Metrology and Monitoring MCU portfolio-designed specifically for high-accuracy energy measurement in smart grid infrastructure, where metrology integrity, security, and ultra-low standby power are non-negotiable.

FAQ

What metrology standards does the MSP430F67751AIPZR meet?

The MSP430F67751AIPZR meets or exceeds ANSI C12.20 (Class 0.2) and IEC 62053-22 (Class 0.5S) accuracy standards for active energy measurement. Its seven 24-bit sigma-delta ADCs, digital phase correction, and temperature-compensated computation engine ensure compliance across 40–70 Hz line frequencies with single-point calibration-verified in TI's Energy Measurement Design Center (EMDC) software flow for the MSP430F67751AIPZR.

Does the MSP430F67751AIPZR support neutral current measurement?

Yes, the MSP430F67751AIPZR supports full 3-phase + neutral current measurement using its seven independent SD24_B sigma-delta modulators: six channels handle phase A/B/C voltage and current pairs, while the seventh (SD6) is dedicated to neutral current sensing. This architecture enables true 4-wire star topology measurement and cumulative 4-quadrant energy calculation required by ANSI C12.20 Annex B and IEC 62053-23.

What is the lowest power mode available on the MSP430F67751AIPZR and its typical current draw?

The MSP430F67751AIPZR supports LPM4.5 (shutdown mode) drawing 0.18 µA at 3 V, and LPM3.5 (RTC mode) drawing 0.34 µA at 3 V-both retaining RTC operation and tamper-detection circuitry. In LPM3 (standby), it draws 2.1 µA while keeping RAM and real-time clock active, enabling fast wake-up (<5 µs) for pulse-event capture or communication interrupts-critical for battery-backed utility meters using the MSP430F67751AIPZR.

Can the MSP430F67751AIPZR drive an LCD display directly?

Yes, the MSP430F67751AIPZR integrates a programmable LCD_C controller supporting up to 320 segments with static, 2-, 3-, or 4-mux configurations. It provides built-in charge pump, contrast control, and blinking functionality-eliminating external LCD bias generators. In LPM3, LCD operation consumes only 3 µA, allowing continuous display visibility during AC mains failure using backup battery power.

How many communication interfaces does the MSP430F67751AIPZR include and what protocols do they support?

The MSP430F67751AIPZR includes six enhanced Universal Serial Communication Interfaces (eUSCIs): four eUSCI_A modules supporting UART, IrDA, and SPI; and two eUSCI_B modules supporting SPI and I²C. This enables concurrent implementation of optical port (IrDA), PLC modem (UART), RF module (SPI), and sensor interface (I²C)-all without external bridge ICs-making the MSP430F67751AIPZR ideal for multi-interface AMI endpoints.