Texas Instruments MSP430F67451IPZ

Overview

MSP430F67451IPZ from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four 24-bit sigma-delta ADCs, 128KB flash, 16KB RAM, and 100-pin LQFP (PZ) package with 62 I/O pins. It delivers <0.1% energy measurement accuracy over 2000:1 dynamic range, meets ANSI C12.20 and IEC 62053 standards, and supports three-phase plus neutral power measurement in utility metering applications.

For engineers reviewing the MSP430F67451IPZ datasheet, MSP430F67451IPZ pinout, MSP430F67451IPZ application, or MSP430F67451IPZ equivalent, this page provides verified technical context, key specifications including SD24_B converter count and low-power mode currents, real-world use scenarios in revenue-grade metering, and validated alternative options for design continuity.

Technical Context

The MSP430F67451IPZ integrates a 25-MHz ultra-low-power CPU with 32-bit hardware multiplier to execute TI's energy measurement software library, enabling tariff management and AMR/AMI communication without external co-processors. Its analog front end includes four independent 24-bit sigma-delta modulators with differential inputs and programmable gain, supporting current transformers, Rogowski coils, or shunt sensors across all phases.

It implements dedicated pulse output pins for active/reactive energy calibration, digital phase correction per channel, and temperature-compensated energy calculations across 40–70 Hz line frequencies using single-point calibration. The device operates from 3.6 V down to 1.8 V and achieves 0.18 µA shutdown current (LPM4.5) with RTC retention, enabling extended backup operation during AC mains failure.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67451IPZ, MSP430F67461IPZ offers scalable memory for evolving firmware needs, while MSP430F67651IPZ extends analog sensing capability within the same footprint-both maintain identical low-power profiles and metrology accuracy for drop-in evaluation.

Availability

MSP430F67451IPZ is available at Aetrix Electronics and suitable for utility metering, smart grid infrastructure, and industrial energy monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing for revenue-critical deployments.

Supply support for MSP430F67451IPZ 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 energy efficiency, reliability, and system integration.

The MSP430F674x1 product line was engineered specifically for cost-sensitive, high-accuracy polyphase electricity meters-integrating metrology-grade analog front ends, ultra-low-power processing, and secure communication peripherals in a single SoC.

FAQ

What is the maximum number of 24-bit sigma-delta ADC channels supported by the MSP430F67451IPZ?

The MSP430F67451IPZ integrates exactly four independent 24-bit sigma-delta ADCs (SD24_B), each with differential inputs and programmable gain. This configuration is fixed for the MSP430F674x1 family and explicitly confirmed in the Device Comparison table (SLAS815D, Table 3-1). No firmware or configuration can increase this count beyond four channels.

Does the MSP430F67451IPZ support ANSI C12.20 and IEC 62053 compliance out of the box?

Yes, the MSP430F67451IPZ is designed to meet or exceed ANSI C12.20 and IEC 62053-21/-22 standards for Class 0.2 accuracy. Its <0.1% error over 2000:1 dynamic range, four-quadrant measurement, and digital phase correction are validated features-not theoretical capabilities-and are explicitly stated in the "Features" section of the official datasheet (SLAS815D, Section 1.1).

What is the standby current consumption of the MSP430F67451IPZ in LPM3 mode?

The MSP430F67451IPZ draws 2.1 µA in LPM3 mode at 3 V, as specified in the "Features" section (SLAS815D, Section 1.1) and confirmed in Section 5.5 of the datasheet. This current includes active RTC operation and wake-up capability in under 5 µs, making it suitable for battery-backed metering applications with extended hold-up time.

Can the MSP430F67451IPZ drive a 320-segment LCD directly?

Yes, the MSP430F67451IPZ includes an integrated LCD controller (LCDC) capable of driving up to 320 segments with programmable contrast control. This is explicitly documented in the "Features" list (SLAS815D, Section 1.1) and supported by the presence of eight COM outputs (COM0–COM7) and corresponding segment pins in the 100-pin PZ package pinout.

How many I/O pins does the MSP430F67451IPZ provide in its 100-pin LQFP package?

The MSP430F67451IPZ in the 100-pin LQFP (PZ) package provides 62 general-purpose I/O pins, as confirmed in both the "Features" section (SLAS815D, Section 1.1) and the Device Comparison table (Table 3-1). This count excludes power, ground, crystal, and dedicated analog inputs (e.g., SDxP/N), and matches all other MSP430F674x1 IPZ variants.