Texas Instruments MSP430F67691AIPEUR

Overview

MSP430F67691AIPEUR from Texas Instruments is a polyphase metering SoC designed for high-accuracy 3-phase energy measurement in utility-grade smart meters. It integrates six independent 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 512KB flash/32KB RAM, LCD controller (320 segments), and dual eUSCI_A/B interfaces - enabling ANSI C12.20 and IEC 62053-compliant metering with <0.1% error over 2000:1 dynamic range at 50/60 Hz.

For engineers reviewing the MSP430F67691AIPEUR datasheet, MSP430F67691AIPEUR pinout, MSP430F67691AIPEUR application, or MSP430F67691AIPEUR equivalent, key selection criteria include its 128-pin LQFP package with 90 GPIOs, RTC with tamper detection and temperature compensation, ultra-low-power LPM3.5 mode (0.34 µA), and dedicated pulse outputs for active/reactive energy calibration in revenue-grade meter designs.

Technical Context

The MSP430F67691AIPEUR implements a metrology-optimized architecture with six SD24_B sigma-delta modulators supporting differential inputs and programmable gain, paired with a 10-bit SAR ADC for auxiliary sensing (supply voltage, die temperature). Its real-time clock includes crystal offset calibration and tamper detection logic tied to dedicated pins (RTCCLK, RTCCAP0/1).

Digital subsystems include three-channel DMA, 16-bit CRC engine, four Timer_A modules (9 capture/compare registers total), and six eUSCI peripherals - four UART/IrDA/SPI-capable (eUSCI_A0–A3) and two SPI/I²C-capable (eUSCI_B0–B1) - all configurable via port mapping registers to support flexible communication topologies in multi-interface meter gateways.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body, 0.5 mm pitch, 90 I/O pins. Thermal pad exposed on underside for enhanced heat dissipation in sealed meter enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67691AIPZ, the MSP430F67691AIPEUR offers 28 additional GPIOs and two extra sigma-delta channels for expanded sensor connectivity; versus MSP430F67791AIPEU, it trades one metrology channel for lower cost while retaining identical power, timing, and communication capabilities essential for Class 0.5S metering.

Availability

MSP430F67691AIPEUR is available at Aetrix Electronics and suitable for smart electricity meters, revenue-grade submeters, AMI gateway nodes, and industrial energy monitoring systems requiring stable component supply, long-term lifecycle support, and metrology-grade traceability.

Supply support for MSP430F67691AIPEUR 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 digital signal technologies with over 50 years of innovation in precision measurement and low-power design.

The MSP430F67691AIPEUR belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for ANSI/IEC-compliant energy measurement in utility infrastructure where accuracy, security, and ultra-low-power operation are non-negotiable.

FAQ

What metrology standards does the MSP430F67691AIPEUR support?

The MSP430F67691AIPEUR meets or exceeds ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S accuracy requirements for active energy measurement. Its <0.1% error over 2000:1 dynamic range, 4-quadrant calculation capability, and temperature-compensated algorithms are validated per these standards. The device also supports IEC 62053-23 for reactive energy when configured with appropriate external references and calibration routines.

Does the MSP430F67691AIPEUR include hardware security features?

Yes, the MSP430F67691AIPEUR integrates password-protected RTC with tamper detection logic that monitors physical intrusion events (e.g., case opening, voltage glitching) and triggers secure register erasure. It also supports AES-128 encryption via software libraries and includes dedicated memory protection units to isolate secure boot code and calibration constants from application firmware.

How many independent sigma-delta ADC channels does the MSP430F67691AIPEUR have?

The MSP430F67691AIPEUR features six independent 24-bit sigma-delta ADC channels (SD0–SD5), each with differential inputs, programmable gain, and dedicated modulator clocks. This configuration supports simultaneous sampling of three-phase voltage/current plus neutral and auxiliary channels - sufficient for 3-phase 4-wire star or delta metering topologies meeting ANSI C12.20 and IEC 62053 requirements.

What is the lowest power consumption mode supported by the MSP430F67691AIPEUR?

The MSP430F67691AIPEUR achieves 0.34 µA in RTC mode (LPM3.5) at 3 V, maintaining real-time clock operation with crystal oscillator and calendar functions active while disabling CPU, flash, and most peripherals. This enables decade-long battery backup for timekeeping during AC mains failure - critical for revenue meter timestamp integrity and tariff scheduling.

Can the MSP430F67691AIPEUR drive a 320-segment LCD directly?

Yes, the MSP430F67691AIPEUR integrates a fully autonomous LCD controller supporting up to 320 segments in 4-mux or 8-mux configurations. It includes built-in charge pump, contrast control registers, and blinking logic - eliminating the need for external LCD bias generators or driver ICs in smart meter front-panel displays.