Texas Instruments MSP430F67671IPZR

Overview

MSP430F67671IPZR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring six 24-bit sigma-delta ADCs, 25-MHz CPU with 32-bit multiplier, 256KB flash, 32KB RAM, and LCD controller supporting up to 320 segments - enabling ANSI C12.20/IEC 62053-compliant energy measurement with <0.1% accuracy over 2000:1 dynamic range.

For engineers reviewing the MSP430F67671IPZR datasheet, MSP430F67671IPZR pinout, MSP430F67671IPZR application, or MSP430F67671IPZR equivalent, this device serves as a system-on-chip solution for utility-grade revenue metering with integrated metrology, real-time clock, anti-tamper security, and multi-interface communications (UART/SPI/I²C) in a 100-pin LQFP package.

Technical Context

The MSP430F67671IPZR implements a dedicated metrology subsystem with six independent SD24_B sigma-delta modulators supporting differential inputs and programmable gain, plus a system 10-bit ADC for auxiliary sensing. Its ultra-low-power architecture supports LPM3.5 (0.34 µA) and LPM4.5 (0.18 µA) modes, with RTC operation during AC mains failure at 3 µA.

It integrates TI's energy measurement software library for direct calculation of active/reactive energy, four-quadrant power, phase angle, and temperature-compensated results - all executed on the 25-MHz MSP430 CPU without external co-processing. The device uses dual supply domains (AVCC/DVCC) and supports automatic power-source switching between main and backup supplies.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), body size 14 mm × 14 mm, 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 SoC applications.

Compared with MSP430F67671IPZR, the MSP430F67691IPZ offers greater firmware headroom for DLMS certification, while the MSP430F67671IPEU delivers expanded metrology I/O and GPIO - both retain identical metrology accuracy, RTC, and low-power performance.

Availability

MSP430F67671IPZR is available at Aetrix Electronics and suitable for smart electricity meters, utility revenue meters, and industrial energy monitoring systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MSP430F67671IPZR 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 MSP430F67671IPZR belongs to TI's polyphase metering SoC product line, engineered specifically for ANSI/IEC-compliant revenue meters that demand ultra-low-power operation, integrated security, and minimal external components.

FAQ

What is the maximum number of independent current/voltage measurement channels supported by the MSP430F67671IPZR?

The MSP430F67671IPZR integrates six 24-bit sigma-delta ADCs (SD24_B), enabling simultaneous high-accuracy acquisition across three phases plus neutral - supporting full 3-phase 4-wire metering with dedicated differential inputs for each channel. It does not support seven channels like the F67691 variant.

Does the MSP430F67671IPZR include hardware-accelerated energy calculation engines?

No, the MSP430F67671IPZR relies on its 25-MHz CPU and TI's energy measurement software library to compute active/reactive energy, apparent power, and phase angles in real time. All calculations execute in firmware - no dedicated hardware metering accelerator is present.

What RTC accuracy can be achieved with the MSP430F67671IPZR under temperature variation?

The MSP430F67671IPZR achieves ±2 ppm RTC accuracy over –40°C to +85°C using internal crystal offset calibration and temperature compensation algorithms - verified per TI's SLAS815D specification and validated in production meters meeting ANSI C12.20 timekeeping requirements.

Can the MSP430F67671IPZR drive a 320-segment LCD without external components?

Yes, the MSP430F67671IPZR includes an integrated LCD controller with charge-pump voltage generator and contrast control, directly driving up to 320 segments (8 commons × 40 segments) - eliminating need for external LCD bias ICs or resistors.

Is the MSP430F67671IPZR qualified for industrial temperature operation?

Yes, the MSP430F67671IPZR is specified for continuous operation from –40°C to +85°C ambient temperature, with full functionality across its entire electrical specification range - including metrology accuracy, RTC stability, and low-power mode currents.