Texas Instruments MSP430F67651AIPEUR

Overview

MSP430F67651AIPEUR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring six 24-bit sigma-delta ADCs, 128KB flash, 16KB RAM, and ultra-low-power operation (0.18 µA in LPM4.5). It supports ANSI C12.20 and IEC 62053 compliance, 4-quadrant energy measurement per phase, and integrated LCD driver for up to 320 segments.

For engineers reviewing the MSP430F67651AIPEUR datasheet, MSP430F67651AIPEUR pinout, MSP430F67651AIPEUR application, or MSP430F67651AIPEUR equivalent, this page delivers verified technical context, package-validated pin functions, metrology-specific feature value, real-world utility metering use cases, and two confirmed alternative SoCs with documented functional and memory differences.

Technical Context

The MSP430F67651AIPEUR implements a dedicated metrology subsystem with six independent SD24_B sigma-delta modulators-each supporting differential inputs, programmable gain, and >100dB SNR-paired with a high-precision 10-bit SAR ADC for auxiliary sensing. Its 25-MHz CPU includes a 32-bit hardware multiplier optimized for real-time energy calculations across three phases plus neutral.

Power management integrates multiple low-power modes (LPM3: 2.1 µA, LPM3.5: 0.34 µA, LPM4.5: 0.18 µA), RTC with tamper detection and temperature compensation, and automatic supply switching between AC mains and backup battery-enabling >10-year battery life in meter failure scenarios while retaining critical calibration data.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, with 90 usable I/O pins. Thermal pad not present; standard surface-mount reflow profile applies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67651AIPEUR, the MSP430F67661AIPEUR offers double flash capacity for enhanced firmware extensibility, while the MSP430F67671AIPEUR adds 16 KB RAM to support concurrent waveform logging and harmonic FFT-both retain identical metrology accuracy, pinout, and low-power behavior.

Availability

MSP430F67651AIPEUR is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and AMI gateway node designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for utility-certified deployments.

Supply support for MSP430F67651AIPEUR 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 over 50 years of innovation in low-power microcontrollers and precision metrology ICs.

The MSP430™ Metrology and Monitoring MCU portfolio targets energy measurement and power monitoring applications-including smart grid infrastructure and building automation-with integrated sigma-delta ADCs, RTC security, and ultra-low-power operation.

FAQ

What is the maximum number of independent current/voltage channels supported by the MSP430F67651AIPEUR?

The MSP430F67651AIPEUR supports six independent 24-bit sigma-delta ADC channels (SD24_B), configured as three differential voltage inputs and three differential current inputs-enabling full 3-phase + neutral metering with simultaneous sampling and phase-angle calculation. This architecture is validated in TI's EVM430-F6779 reference design and meets ANSI C12.20 Class 0.2 accuracy requirements.

Does the MSP430F67651AIPEUR include hardware-based security features for utility metering?

Yes, the MSP430F67651AIPEUR includes password-protected RTC with tamper detection pins (TAMPER0/TAMPER1), hardware AES accelerator for firmware encryption, and secure bootloader (BSL) with JTAG lock. These features enable compliance with ANSI C12.10 anti-tamper standards and prevent unauthorized access to calibration data or time registers-critical for revenue-grade meter certification.

What is the lowest power consumption mode of the MSP430F67651AIPEUR, and what functionality remains active?

The MSP430F67651AIPEUR achieves 0.18 µA in LPM4.5 (shutdown mode) at 3 V, with only the RTC running from VBAT and critical registers retained. The 32.768 kHz crystal oscillator remains active, and tamper detection circuitry stays armed-allowing >10-year battery-backed operation while preserving timekeeping and secure state during AC mains failure.

Can the MSP430F67651AIPEUR drive a 320-segment LCD without external components?

Yes, the MSP430F67651AIPEUR integrates a full-featured LCD_C peripheral supporting up to 320 segments (8 commons × 40 segments) with internal charge pump, contrast control, and blinking capability. No external bias generator or capacitors are required-reducing BOM cost and PCB area in space-constrained meter designs.

Is the MSP430F67651AIPEUR pin-compatible with other devices in the MSP430F676x1A family?

Yes, all MSP430F676x1A variants-including MSP430F67651AIPEUR, MSP430F67661AIPEUR, and MSP430F67671AIPEUR-share identical 128-pin LQFP (PEU) package pinout, electrical characteristics, and peripheral mapping. Firmware and layout are interchangeable; only flash/RAM capacity differs between variants.