Texas Instruments MSP430F67671IPZ

Overview

MSP430F67671IPZ from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring six 24-bit sigma-delta ADCs, 256KB flash, 32KB RAM, and <0.1% energy measurement accuracy over 2000:1 dynamic range. It integrates LCD controller (320 segments), RTC with temperature compensation, anti-tamper security modules, and supports ANSI C12.20 and IEC 62053 compliance.

For engineers reviewing the MSP430F67671IPZ datasheet, MSP430F67671IPZ pinout, MSP430F67671IPZ application, or MSP430F67671IPZ equivalent, this device is selected for high-accuracy utility metering where ultra-low-power operation (0.34 µA in LPM3.5), multi-sensor interface (CT/Rogowski/shunt), and integrated energy calculation firmware are critical design requirements.

Technical Context

The MSP430F67671IPZ implements a dedicated metering architecture with seven independent SD24_B sigma-delta modulators (six used; one reserved) supporting differential inputs and programmable gain for phase current/voltage sensing. Its 25-MHz CPU executes TI's energy measurement software library to compute active/reactive energy, power quality metrics, and tariff management without external co-processors.

It features dual power domains (AVCC/DVCC), auxiliary supplies (AUXVCC1–3) for backup subsystem operation during AC mains failure, and hardware-accelerated digital phase correction for CT-based current sensing - all operating within –40°C to 85°C industrial temperature range.

Key Specifications

Pinout & Package

100-pin LQFP (PZ) package, 14 mm × 14 mm body size, 0.5 mm pitch, with 62 general-purpose I/O pins. Includes dedicated SD24_B analog input pairs (SD0P0/SD0N0 through SD6P0/SD6N0), auxiliary supply rails (AUXVCC1–3), RTC crystal pins (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 applications.

Compared with MSP430F67671IPZ, the MSP430F67691IPZ offers greater flash headroom for advanced AMI features, while the MSP430F67671IPEU provides expanded I/O for multi-interface smart meter designs - both retain identical metrology accuracy, low-power behavior, and software compatibility.

Availability

MSP430F67671IPZ is available at Aetrix Electronics and suitable for 3-phase electronic watt-hour meters, utility metering infrastructure, and industrial energy monitoring systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MSP430F67671IPZ 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 for industrial, automotive, and consumer applications.

The MSP430F67671IPZ belongs to TI's polyphase metering SoC product line, engineered specifically for revenue-grade electricity meters that demand metrology-grade accuracy, ultra-low-power operation, and integrated security - eliminating external metrology ICs and reducing BOM cost.

FAQ

What is the maximum number of active SD24_B ADC channels supported by the MSP430F67671IPZ?

The MSP430F67671IPZ supports six active 24-bit sigma-delta ADC channels for simultaneous phase current and voltage measurement. Although the SD24_B module has seven converters, one is reserved for internal reference or diagnostic use - confirmed in the device comparison table and functional block diagram of SLAS815D.

Does the MSP430F67671IPZ include hardware acceleration for energy calculations?

Yes, the MSP430F67671IPZ executes TI's certified energy measurement software library in firmware, but it does not contain dedicated hardware accelerators (e.g., DSP cores or fixed-function math units). All energy computations - including active/reactive power, RMS, and fundamental frequency - are performed by the 25-MHz CPU with 32-bit multiplier, optimized for low-cycle-count metrology routines.

What is the RTC backup current consumption of the MSP430F67671IPZ in LPM3.5 mode?

The MSP430F67671IPZ consumes 0.34 µA at 3 V in LPM3.5 mode, which powers only the RTC, backup RAM, and AUXVCC3-supplied tamper detection circuitry. This value is specified in Section 5.5 of the SLAS815D datasheet and validated across the –40°C to 85°C temperature range.

Can the MSP430F67671IPZ drive a 320-segment LCD without external components?

Yes, the MSP430F67671IPZ integrates a full LCD controller supporting up to 320 segments (8 commons × 40 segments) with programmable contrast control, internal charge pump, and software-configurable bias. No external capacitors or voltage boosters are required for standard multiplexed LCDs meeting its voltage and timing specifications.

Which communication interfaces are available on the MSP430F67671IPZ for smart meter connectivity?

The MSP430F67671IPZ provides six enhanced USCI modules: four configurable as UART/IrDA/SPI and two as SPI/I²C. These support concurrent interfaces - for example, UART for optical port, SPI for RF transceiver, and I²C for EEPROM or sensor - with full DMA support to minimize CPU loading during high-throughput data transfer.