Texas Instruments MSP430F67761IPEU

Overview

MSP430F67761IPEU from Texas Instruments is a polyphase metering SoC designed for revenue-grade 3-phase electronic watt-hour meters. It integrates seven 24-bit sigma-delta ADCs, 256KB flash, 16KB RAM, LCD controller (320 segments), and real-time clock with temperature compensation - delivering <0.1% energy measurement accuracy over 2000:1 dynamic range and compliance with ANSI C12.20 and IEC 62053 standards.

For engineers reviewing the MSP430F67761IPEU datasheet, MSP430F67761IPEU pinout, MSP430F67761IPEU application, or MSP430F67761IPEU equivalent, this page provides verified technical context, exact package mapping (128-pin LQFP PEU), confirmed pin functions, key metrology specifications, and two validated alternative parts for utility meter design validation and supply continuity planning.

Technical Context

The MSP430F67761IPEU implements a dedicated metrology subsystem using TI's 24-bit SD24_B modulators with differential inputs, programmable gain, and digital phase correction for current transformers. Its CPU executes TI's energy measurement software library to compute active/reactive energy, power quality metrics, and tariff management in real time.

It supports flexible power architecture with auxiliary supplies (AUXVCC1–3), ultra-low-power RTC mode (0.34 µA), and backup operation during AC mains failure (3 µA in LPM3). The device uses a 25-MHz MSP430 CPU with 32-bit hardware multiplier and operates across 1.8–3.6 V with industrial temperature range (–40°C to +85°C).

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 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 MSP430F67771IPEU, the MSP430F67761IPEU trades RAM headroom for lower cost and power; compared with MSP430F67661IPEU, it adds a seventh metrology channel for neutral current monitoring - enabling full 4-wire compliance and improved unbalance detection.

Availability

MSP430F67761IPEU is available at Aetrix Electronics and suitable for smart grid revenue metering, industrial energy monitoring, and AMI endpoint development requiring stable component supply and long-term lifecycle assurance.

Supply support for MSP430F67761IPEU 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 specializing in analog, embedded processing, and energy-efficient technologies for industrial, automotive, and communications markets.

The MSP430F67761IPEU belongs to TI's polyphase metering SoC product line, engineered specifically for ANSI/IEC-certified electricity meters - integrating metrology, security, display, and communication in a single ultra-low-power device.

FAQ

What is the maximum dynamic range and accuracy of the MSP430F67761IPEU for energy measurement?

The MSP430F67761IPEU achieves <0.1% accuracy over a 2000:1 dynamic range for phase current measurements, meeting Class 0.2 requirements per IEC 62053-22 and ANSI C12.20. This performance is enabled by its seven 24-bit sigma-delta ADCs with digital phase correction and temperature-compensated calibration routines executed in firmware.

Does the MSP430F67761IPEU support real-time clock operation during AC mains failure?

Yes, the MSP430F67761IPEU supports RTC operation in LPM3.5 mode drawing only 0.34 µA at 3 V using AUXVCC3 backup supply. It retains timekeeping, calendar functions, and critical registers during AC loss - enabling uninterrupted timestamping of energy events and tamper logs.

How many independent sigma-delta ADC channels does the MSP430F67761IPEU include?

The MSP430F67761IPEU includes seven independent 24-bit sigma-delta ADCs (SD24_B) with differential inputs and variable gain. These support simultaneous sampling of three-phase voltages, three-phase currents, neutral current, and reference channels - essential for full 3-phase 4-wire metering compliance.

What package type and pin count does the MSP430F67761IPEU use?

The MSP430F67761IPEU uses a 128-pin LQFP package designated "PEU", with 20 mm × 14 mm body size and 0.5-mm pitch. It provides 90 general-purpose I/O pins plus dedicated metrology analog inputs, LCD drivers, and auxiliary power terminals.

Which communication interfaces are available on the MSP430F67761IPEU for smart meter connectivity?

The MSP430F67761IPEU features six enhanced USCI modules configurable as four UARTs, six SPIs, or two I²C interfaces. This flexibility supports common AMI protocols including DLMS/COSEM over UART (PLC/RF modems), SPI-connected secure elements, and I²C sensors - all while maintaining metrology accuracy during concurrent operation.