Texas Instruments MSP430F67471IPZ

Overview

MSP430F67471IPZ 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, 32KB RAM, and support for ANSI C12.20/IEC 62053 compliance with <0.1% accuracy over 2000:1 dynamic range. It integrates LCD controller (320 segments), RTC with temperature compensation, and anti-tamper security modules.

For engineers reviewing the MSP430F67471IPZ datasheet, MSP430F67471IPZ pinout, MSP430F67471IPZ application, or MSP430F67471IPZ equivalent, key selection criteria include its 100-pin LQFP (PZ) package, 62 I/O count, 4-channel SD24_B ADC configuration, ultra-low-power LPM3.5 mode (0.34 µA), and dedicated pulse output pins for active/reactive energy calibration in utility metering systems.

Technical Context

The MSP430F67471IPZ implements a 25-MHz ultra-low-power CPU with 32-bit hardware multiplier to execute TI's energy measurement software library for real-time kWh, kVARh, and power quality calculations. Its analog front-end includes four independent 24-bit sigma-delta modulators with differential inputs, programmable gain, and digital phase correction for current transformers.

It supports flexible power architecture with automatic switching between main and backup supplies (AUXVCC1–AUXVCC3), enabling >10-year battery-backed operation during AC mains failure. The device operates across 1.8–3.6 V and –40°C to +85°C, with integrated LCD driver, RTC tamper detection, and six eUSCI ports configurable as UART/SPI/I²C for AMR/AMI communication.

Key Specifications

Pinout & Package

100-pin LQFP (PZ) package with 62 general-purpose I/O pins, dedicated SD24_B analog input pairs (SD0P0/SD0N0 through SD3P0/SD3N0), dual auxiliary supply rails (AUXVCC1–AUXVCC3), RTC crystal terminals (XIN/XOUT), and LCD segment/common drivers (COM0–COM7, S0–S39).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67471IPZ, the MSP430F67471IPEU offers greater I/O flexibility in a larger package, while MSP430F67671IPZ extends metrology capability with two additional SD24_B channels - both retain identical low-power profiles and software compatibility but address distinct system scalability needs.

Availability

MSP430F67471IPZ is available at Aetrix Electronics and suitable for smart electricity metering, industrial energy monitoring, and grid-edge IoT node deployments requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified designs.

Supply support for MSP430F67471IPZ 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 connectivity technologies for industrial, automotive, and energy infrastructure markets.

The MSP430F674x1 product line is engineered specifically for revenue-grade polyphase metering, integrating metrology-grade ADCs, ultra-low-power operation, and security features to reduce bill-of-materials and accelerate certification to ANSI/IEC standards.

FAQ

What is the maximum dynamic range accuracy guaranteed for MSP430F67471IPZ in polyphase metering applications?

The MSP430F67471IPZ guarantees <0.1% accuracy over a 2000:1 dynamic range for phase current measurements, validated per ANSI C12.20 and IEC 62053-22 standards. This performance is achieved using its four 24-bit sigma-delta ADCs with digital phase correction and temperature-compensated energy calculation firmware - no external calibration components required.

Does MSP430F67471IPZ support direct connection to current transformers (CTs) and shunt resistors?

Yes, MSP430F67471IPZ supports both current transformers and shunt resistors via its four differential SD24_B ADC inputs (SD0P0/SD0N0 through SD3P0/SD3N0). Each channel includes programmable gain amplifiers and digital phase correction specifically tuned for CT-induced phase lag - eliminating external op-amp or phase-shift circuitry in MSP430F67471IPZ-based designs.

How does MSP430F67471IPZ manage power during AC mains failure?

MSP430F67471IPZ uses three auxiliary supply inputs (AUXVCC1–AUXVCC3) to automatically switch to backup power sources during AC mains failure. In RTC mode (LPM3.5), it draws only 0.34 µA at 3 V - enabling >10-year operation on a single CR2032 battery while maintaining timekeeping, tamper monitoring, and secure memory retention in MSP430F67471IPZ metering systems.

What communication interfaces are available on MSP430F67471IPZ for AMR/AMI integration?

MSP430F67471IPZ integrates six enhanced Universal Serial Communication Interfaces (eUSCI) configurable as four UARTs, six SPIs, or two I²C ports. This flexibility supports concurrent connections to PLC modems, RF transceivers (e.g., Sub-GHz or NB-IoT), and optical port interfaces - all managed by the same MSP430F67471IPZ firmware stack without external protocol bridges.

Is MSP430F67471IPZ pin-compatible with other devices in the MSP430F67xx1 family?

No - MSP430F67471IPZ uses the 100-pin LQFP (PZ) package with 62 I/Os, while devices like MSP430F67471IPEU use the 128-pin LQFP (PEU) package with 90 I/Os. Pinouts differ significantly between PZ and PEU variants; migration requires PCB redesign. However, firmware and peripheral register maps are fully compatible across the MSP430F674x1 family, including MSP430F67471IPZ.