Texas Instruments MSP430F67461AIPZR

Overview

MSP430F67461AIPZR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four 24-bit sigma-delta ADCs with <0.1% accuracy over 2000:1 dynamic range, integrated LCD controller (320 segments), and ultra-low-power RTC mode (0.34 µA at 3 V). It supports ANSI C12.20 and IEC 62053 standards and includes dedicated pulse outputs for active/reactive energy calibration.

For engineers reviewing the MSP430F67461AIPZR datasheet, MSP430F67461AIPZR pinout, MSP430F67461AIPZR application, or MSP430F67461AIPZR equivalent, key selection criteria include its 25-MHz CPU with 32-bit multiplier, 256KB flash/16KB RAM configuration, 128-pin LQFP (PEU) package with 90 I/O pins, and support for current transformers, Rogowski coils, or shunt-based sensing in utility-grade metering systems.

Technical Context

The MSP430F67461AIPZR implements a metrology-optimized architecture with four independent SD24_B sigma-delta modulators feeding dedicated digital filters, enabling simultaneous phase-current and voltage measurements across three phases plus neutral. Its analog front-end includes programmable gain, digital phase correction, and temperature-compensated energy calculation logic.

Digital subsystems include three-channel DMA, 16-bit CRC module, four 16-bit timers (nine capture/compare registers total), six eUSCI modules (four UART/IrDA/SPI-capable, two SPI/I²C-capable), and an LCD_C controller with contrast control - all operating under multiple low-power modes including LPM3.5 (RTC active, 0.34 µA) and LPM4.5 (shutdown, 0.18 µA).

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, 0.5 mm pitch, exposed thermal pad (not electrically connected). Designed for industrial metering PCBs requiring high signal integrity and thermal stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67461AIPZR, the MSP430F67471AIPZR offers double RAM for complex firmware, while the MSP430F67461IPZ reduces package size and I/O count - both retain identical metrology performance but trade off memory or integration density for specific design constraints.

Availability

MSP430F67461AIPZR is available at Aetrix Electronics and suitable for smart electricity meters, industrial energy monitors, and grid-edge sensor nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified designs.

Supply support for MSP430F67461AIPZR 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, with deep expertise in ultra-low-power microcontrollers and precision metrology.

The MSP430F67xx1A product line targets energy measurement and power monitoring applications, specifically engineered for ANSI/IEC-compliant smart meters, building automation, and grid infrastructure with integrated analog front-ends and security features.

FAQ

What is the maximum number of independent 24-bit sigma-delta ADC channels supported by the MSP430F67461AIPZR?

The MSP430F67461AIPZR integrates four independent SD24_B sigma-delta ADC modules (SD0–SD3), each with differential inputs and programmable gain. These are dedicated to simultaneous phase current (A/B/C) and voltage sensing, enabling full 3-phase + neutral metering without external multiplexing or signal conditioning.

Does the MSP430F67461AIPZR support ANSI C12.20 and IEC 62053 standards out of the box?

Yes, the MSP430F67461AIPZR is architected to meet ANSI C12.20 Class 0.2 and IEC 62053-21/22/23 requirements. Its <0.1% accuracy over 2000:1 dynamic range, digital phase correction, temperature compensation, and dedicated pulse outputs for calibration are all implemented in hardware and validated per standard test procedures in TI's Energy Measurement Design Center (EMDC) software.

What low-power modes are available on the MSP430F67461AIPZR, and what is the lowest active current consumption?

The MSP430F67461AIPZR supports six low-power modes. The lowest active current is in LPM4.5 (shutdown mode) at 0.18 µA at 3 V. For RTC operation with retained RAM, LPM3.5 draws 0.34 µA at 3 V. Standby (LPM3) consumes 2.1 µA at 3 V with sub-5-µs wake-up - critical for battery-backed metering during AC failure.

How many I/O pins does the MSP430F67461AIPZR provide in its 128-pin LQFP package?

The MSP430F67461AIPZR in the 128-pin LQFP (PEU) package provides 90 general-purpose I/O pins. These include dedicated LCD segment/commons (COM0–COM7, S0–S39), sigma-delta ADC inputs (SDxP/N), eUSCI peripheral signals (UART/I²C/SPI), and timer/capture resources - all fully configurable via port mapping registers.

Is the MSP430F67461AIPZR pin-compatible with other devices in the MSP430F674x1A family?

Yes, all MSP430F674x1A variants in the 128-pin PEU package - including MSP430F67451AIPZR, MSP430F67471AIPZR, and MSP430F67481AIPZR - share identical pinouts and mechanical footprints. Differences are limited to internal resources (RAM size, SD-ADC count), allowing drop-in upgrades without PCB redesign.