Texas Instruments MSP430F67451AIPZ

Overview

MSP430F67451AIPZ from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four independent 24-bit sigma-delta ADCs, 128KB flash, 16KB RAM, and ultra-low-power operation (0.18 µA in LPM4.5). It supports ANSI C12.20 and IEC 62053 compliance, 4-quadrant energy measurement per phase, and LCD driving for up to 320 segments.

For engineers reviewing the MSP430F67451AIPZ datasheet, MSP430F67451AIPZ pinout, MSP430F67451AIPZ application, or MSP430F67451AIPZ equivalent, key selection criteria include its 100-pin LQFP (PZ) package, 4-channel SD24_B ADC configuration, RTC with tamper detection, and support for UART/I²C/SPI communication in smart metering systems requiring high metrology accuracy and long battery backup.

Technical Context

The MSP430F67451AIPZ implements a dedicated metrology subsystem with four 24-bit sigma-delta modulators feeding into digital filters, enabling <0.1% accuracy over 2000:1 dynamic range for phase current. Its CPU executes Energy Measurement software library routines for real-time active/reactive power, energy, and RMS calculations.

It integrates dual supply domains (AVCC/DVCC), auxiliary voltage regulators (AUXVCC1–3), and hardware-accelerated peripherals including three-channel DMA, 16-bit CRC, and six eUSCI modules-four supporting UART/IrDA/SPI (eUSCI_A0–A3) and two supporting SPI/I²C (eUSCI_B0–B1)-all operating under programmable low-power modes down to LPM4.5.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, 0.5 mm pitch. Designed for industrial meter PCB layouts with separate analog/digital supply routing and EMI-sensitive metrology signal integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67451AIPZ, MSP430F67461AIPZ offers double memory for complex firmware while maintaining identical metrology performance, whereas MSP430F67651AIPZ trades two ADC channels for expanded analog sensing capability - both retain pin compatibility and LPM4.5 current spec.

Availability

MSP430F67451AIPZ is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade submetering, and grid-edge energy monitoring requiring stable component supply and long-term industrial lifecycle support.

Supply support for MSP430F67451AIPZ 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, with leadership in low-power microcontrollers and precision metrology ICs.

The MSP430F67xx1A product line targets utility-grade energy measurement applications, integrating metrology ADCs, secure RTC, LCD drivers, and communication peripherals into a single SoC to reduce system cost and accelerate smart meter certification.

FAQ

What is the maximum dynamic range accuracy of the MSP430F67451AIPZ for phase current measurement?

The MSP430F67451AIPZ achieves <0.1% accuracy over a 2000:1 dynamic range for phase current measurement, validated per ANSI C12.20 and IEC 62053 standards. This performance is enabled by its four 24-bit sigma-delta ADCs with programmable gain and digital filtering, and is maintained across temperature using on-chip temperature compensation algorithms executed by the MSP430F67451AIPZ's integrated CPU.

Does the MSP430F67451AIPZ support tamper detection and secure RTC functionality?

Yes, the MSP430F67451AIPZ includes a password-protected real-time clock (RTC) with dedicated tamper detection pins, crystal offset calibration, and temperature compensation. These features meet ANSI C12.1 and IEC 62053-62 anti-tamper requirements, and all tamper events are logged with timestamps in protected RAM - a core security function implemented directly within the MSP430F67451AIPZ silicon.

How many communication interfaces does the MSP430F67451AIPZ integrate, and what protocols do they support?

The MSP430F67451AIPZ integrates six enhanced universal serial communication interfaces (eUSCI): 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 (UART), PLC modem (SPI), sensor interface (I²C), and HAN communication - all managed independently by hardware without CPU overhead in the MSP430F67451AIPZ.

What is the lowest power consumption mode of the MSP430F67451AIPZ, and what functions remain active?

The MSP430F67451AIPZ achieves 0.18 µA in shutdown mode (LPM4.5) at 3 V, with only the RTC and 32-byte RAM retention active. In this state, the main CPU, flash, RAM, and all peripherals are powered down - yet the MSP430F67451AIPZ retains timekeeping and critical tamper logs, enabling >10-year battery-backed operation in AC-fail scenarios typical of utility meter deployments.

Is the MSP430F67451AIPZ pin-compatible with other devices in the MSP430F674x1A family?

Yes, all MSP430F674x1A variants in the 100-pin PZ package - including MSP430F67451AIPZ, MSP430F67461AIPZ, and MSP430F67471AIPZ - share identical pinouts and mechanical footprint. Signal mapping and power domain connections are fully compatible, allowing firmware and PCB reuse across memory and ADC channel variants without layout changes - a key design flexibility provided by the MSP430F67451AIPZ family architecture.