Texas Instruments MSP430F67471IPZR

Overview

MSP430F67471IPZR 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, anti-tamper security modules, and operates across –40°C to 85°C.

For engineers reviewing the MSP430F67471IPZR datasheet, MSP430F67471IPZR pinout, MSP430F67471IPZR application, or MSP430F67471IPZR equivalent, key selection criteria include its 4-channel SD24_B ADC configuration, 100-pin LQFP (PZ) package with 62 I/Os, ultra-low-power LPM3.5 mode (0.34 µA), and dedicated pulse output pins for active/reactive energy calibration in revenue-grade metering systems.

Technical Context

The MSP430F67471IPZR implements TI's 24-bit sigma-delta modulator architecture with differential inputs and programmable gain for precision current/voltage sensing across three phases plus neutral. Its 25-MHz CPU with 32-bit hardware multiplier executes TI's energy measurement software library for real-time kWh, kVARh, and power quality calculations without external co-processing.

It supports flexible sensor interfaces (CTs, Rogowski coils, shunts), digital phase correction, 40–70 Hz line frequency operation with single-point calibration, and dual-domain power management-separate analog (AVCC/AVSS), digital (DVCC/DVSS), and auxiliary (AUXVCCx) rails-with automatic supply switching and backup subsystem operation during AC mains failure.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm, 0.5 mm pitch, exposed thermal pad (not electrically connected). Pinout validated per TI SLAS815D Rev. September 2018, Table 4-2 and Figure 4-2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67471IPZR, the IPZ variant offers identical metrology performance in tray packaging for manual handling, while MSP430F67671IPZR provides two extra SD24_B channels for expanded sensing flexibility-both retain the same ultra-low-power LPM3.5 mode and ANSI/IEC compliance framework.

Availability

MSP430F67471IPZR is available at Aetrix Electronics and suitable for smart grid revenue metering, industrial energy monitoring, and renewable integration metering requiring stable component supply, long-term lifecycle support, and traceable sourcing for UL/CE-certified designs.

Supply support for MSP430F67471IPZR 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 delivering analog and embedded processing solutions, with leadership in low-power microcontrollers and precision metrology ICs.

The MSP430F67xx1 product line is engineered specifically for revenue-grade polyphase electricity meters-integrating metrology ADCs, RTC, LCD, security, and communications into a single SoC to minimize external components and system cost.

FAQ

What is the maximum number of independent 24-bit sigma-delta ADC channels supported by the MSP430F67471IPZR?

The MSP430F67471IPZR integrates exactly four independent 24-bit sigma-delta ADCs (SD24_B) with differential inputs and programmable gain. This configuration is confirmed in TI's SLAS815D datasheet Table 3-1 and matches the "F674x1" family designation. Each channel supports simultaneous sampling for phase A, B, C, and neutral current or voltage sensing-enabling full 3-phase+neutral metrology without external multiplexing.

Does the MSP430F67471IPZR support ANSI C12.20 and IEC 62053 standards out of the box?

Yes, the MSP430F67471IPZR is designed to meet or exceed ANSI C12.20 Class 0.1 and IEC 62053-22 Class 0.5S accuracy requirements. Its <0.1% error over 2000:1 dynamic range, four-quadrant measurement capability, and built-in energy calculation firmware library ensure compliance when implemented per TI's reference designs and calibration procedures-no additional hardware is required to achieve certified meter performance.

What is the standby current consumption of the MSP430F67471IPZR in RTC-only mode?

In RTC mode (LPM3.5), the MSP430F67471IPZR consumes 0.34 µA at 3 V, as specified in Section 5.5 of the SLAS815D datasheet. This ultra-low current enables multi-year operation from a single CR2032 coin cell or supercapacitor backup, maintaining accurate timekeeping and RAM retention during AC mains failure-critical for revenue meter timestamping and outage logging.

Which package type and pin count does the MSP430F67471IPZR use?

The MSP430F67471IPZR uses a 100-pin LQFP package (PZ suffix), measuring 14 mm × 14 mm with 0.5 mm pitch. This is explicitly documented in TI's Device Information table (Section 1.3) and confirmed in the Package Option Addendum. The "R" in IPZR denotes tape-and-reel packaging for automated SMT placement.

Can the MSP430F67471IPZR drive a 320-segment LCD directly without external bias circuitry?

Yes, the MSP430F67471IPZR includes an integrated LCD controller supporting up to 320 segments with programmable contrast control and internal charge pump. It provides eight COM outputs (COM0–COM7) and sufficient SEG lines via port mapping-enabling direct connection to standard multiplexed LCD glass used in utility meters without external drivers or resistor networks.