Texas Instruments MSP430F67461IPEU

Overview

MSP430F67461IPEU from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four 24-bit sigma-delta ADCs, 256KB flash, 16KB RAM, and 90 GPIO in a 128-pin LQFP package. It delivers <0.1% energy measurement accuracy over 2000:1 dynamic range, meets ANSI C12.20 and IEC 62053 standards, and supports current transformers, Rogowski coils, or shunt sensors for phase A–C and neutral power measurement.

For engineers reviewing the MSP430F67461IPEU datasheet, MSP430F67461IPEU pinout, MSP430F67461IPEU application, or MSP430F67461IPEU equivalent, key selection criteria include its 4-channel SD24_B ADC configuration, LQFP-128 (PEU) package with 90 I/Os, RTC with crystal offset calibration, LCD driver for up to 320 segments, and ultra-low-power operation down to 0.18 µA in LPM4.5 mode.

Technical Context

The MSP430F67461IPEU implements a dedicated metering architecture with four independent 24-bit sigma-delta modulators feeding digital filters and energy calculation engines, enabling four-quadrant per-phase or cumulative active/reactive energy computation. Its 25-MHz CPU with 32-bit hardware multiplier executes TI's energy measurement software library for tariff management and communication stack handling.

It integrates dual auxiliary supply domains (AUXVCC1/2/3), programmable gain amplifiers for sensor interface, pulse output pins for active/reactive energy calibration, and flexible clock system supporting 32.768-kHz crystal, internal VLO, and DCO. The device operates across 1.8–3.6 V and –40°C to +85°C, with standby current of 2.1 µA in LPM3 and 0.34 µA in RTC mode.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, industrial temperature range (–40°C to +85°C). Pin functions validated per TI SLAS815D Rev. September 2018, Table 4-1 and Figure 4-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67471IPEU, the MSP430F67461IPEU trades RAM capacity for lower cost and power in simpler meter designs; versus MSP430F67661IPEU, it reduces ADC count to optimize die size and thermal profile while retaining core metrology functionality.

Availability

MSP430F67461IPEU is available at Aetrix Electronics and suitable for smart electricity meters, revenue-grade energy monitors, and AMI endpoint nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified deployments.

Supply support for MSP430F67461IPEU 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 specializing in analog and embedded processing technologies, with leadership in low-power microcontrollers and precision metrology solutions.

The MSP430F67xx family is designed specifically for polyphase revenue metering applications, integrating high-accuracy sigma-delta ADCs, secure real-time clocks, LCD drivers, and communication peripherals into a single ultra-low-power SoC platform.

FAQ

What is the maximum number of independent 24-bit sigma-delta ADC channels supported by the MSP430F67461IPEU?

The MSP430F67461IPEU integrates exactly four independent 24-bit sigma-delta ADC channels (SD24_B) - confirmed in TI SLAS815D Table 3-1 and Section 1.1 Features. These channels support differential inputs for simultaneous sampling of phase A, B, C, and neutral currents or voltages, enabling full 3-phase + neutral energy calculation without external multiplexing or ADCs. This configuration is fixed and cannot be increased via firmware.

Does the MSP430F67461IPEU meet ANSI C12.20 and IEC 62053 standards for revenue metering?

Yes, the MSP430F67461IPEU is explicitly stated in TI SLAS815D Section 1.1 to "meet or exceed ANSI C12.20 and IEC 62053 standards." Its <0.1% energy measurement accuracy over 2000:1 dynamic range, four-quadrant computation, and temperature-compensated design fulfill Class 0.1 requirements for active energy measurement under both standards, making it suitable for certified revenue-grade meter deployments.

What package type and pin count does the MSP430F67461IPEU use?

The MSP430F67461IPEU uses a 128-pin LQFP package designated "PEU," with 20 mm × 14 mm body dimensions and 90 usable I/O pins - as documented in TI SLAS815D Device Information table and Figure 4-1. This package is shared across the MSP430F674x1, F676x1, and F677x1 families, ensuring layout compatibility for scalable meter designs.

How much flash memory and RAM does the MSP430F67461IPEU include?

The MSP430F67461IPEU contains 256 KB of single-cycle flash memory and 16 KB of RAM, as specified in TI SLAS815D Table 3-1 and Section 1.1. This memory allocation supports TI's energy measurement software library, secure boot code, tariff management logic, and communication protocol stacks (e.g., DLMS/COSEM or IEEE 1703) without external memory expansion.

What are the lowest power consumption modes available on the MSP430F67461IPEU?

The MSP430F67461IPEU achieves 0.18 µA in LPM4.5 (shutdown mode), 0.34 µA in LPM3.5 (RTC-only mode), and 2.1 µA in LPM3 (standby with RAM retention) - all measured at 3 V per TI SLAS815D Section 1.1 and Section 5.5. These modes enable >10-year battery life in backup operation and rapid wake-up (<5 µs) for event-driven metering tasks.