Texas Instruments MSP430F67671AIPEUR

Overview

MSP430F67671AIPEUR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, integrating six 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 256KB flash, 32KB RAM, LCD controller (320 segments), and dual eUSCI_A/B interfaces. It achieves <0.1% accuracy over 2000:1 dynamic range per phase and meets ANSI C12.20 and IEC 62053 standards.

For engineers reviewing the MSP430F67671AIPEUR datasheet, MSP430F67671AIPEUR pinout, MSP430F67671AIPEUR application, or MSP430F67671AIPEUR equivalent, key selection criteria include metrology-grade ADC channel count, RTC tamper detection, pulse output support for active/reactive energy calibration, and LQFP-128 package compatibility with 90 GPIOs and integrated auxiliary supply management.

Technical Context

The MSP430F67671AIPEUR implements a dedicated metrology subsystem with six independent SD24_B sigma-delta modulators-each supporting differential inputs, programmable gain, and digital phase correction for current transformers. Its real-time clock includes crystal offset calibration, temperature compensation, and password-protected tamper detection logic tied to dedicated pins.

Digital subsystem features include three-channel DMA, 16-bit CRC module, four 16-bit timers (nine capture/compare registers total), and six eUSCI modules: four UART/IrDA/SPI-capable (eUSCI_A0–A3) and two SPI/I²C-capable (eUSCI_B0–B1). Power management supports LPM3 (2.1 µA), LPM3.5 (0.34 µA), and LPM4.5 (0.18 µA) modes with sub-5-µs wake-up latency.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, 0.5 mm pitch, exposed thermal pad not present. Designed for reflow assembly and industrial meter PCB layouts with analog/digital partitioning.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67671AIPEUR, the MSP430F67691AIPEUR provides greater flash capacity and an additional sigma-delta ADC for expanded sensor support, while the MSP430F67671AIPZ offers identical metrology capability in a smaller package at the cost of I/O count - enabling trade-offs between feature density and form factor.

Availability

MSP430F67671AIPEUR is available at Aetrix Electronics and suitable for smart electricity meters, revenue-grade energy monitors, and AMI endpoint nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified designs.

Supply support for MSP430F67671AIPEUR 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 with decades of utility metering domain expertise.

The MSP430F67671AIPEUR belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for high-accuracy, low-power energy measurement in smart grid and building automation systems - prioritizing metrology precision, security, and regulatory compliance.

FAQ

What metrology accuracy does the MSP430F67671AIPEUR achieve under ANSI C12.20 and IEC 62053 standards?

The MSP430F67671AIPEUR achieves <0.1% accuracy over a 2000:1 dynamic range for phase current measurements and meets or exceeds ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S requirements. This is enabled by its six 24-bit sigma-delta ADCs with digital phase correction, temperature compensation, and single-point calibration across 40–70 Hz line frequencies - all verified in TI's production test flow for MSP430F67671AIPEUR devices.

Does the MSP430F67671AIPEUR support hardware pulse outputs for active and reactive energy calibration?

Yes, the MSP430F67671AIPEUR includes dedicated hardware pulse output pins that generate precise, CPU-independent active and reactive energy pulses. These outputs are fully configurable in frequency and duty cycle via register settings and directly drive LEDs or optocouplers - eliminating software timing jitter and ensuring repeatable calibration traceability for MSP430F67671AIPEUR-based meters.

How does the MSP430F67671AIPEUR handle tamper detection and secure RTC operation?

The MSP430F67671AIPEUR integrates a password-protected RTC with dedicated tamper-detect pins (e.g., RTCCLK, TACLK), crystal offset calibration, and temperature compensation. Physical tampering triggers immediate non-volatile event logging, secure memory wipe, and optional system reset - all enforced in hardware without CPU intervention, ensuring audit integrity for MSP430F67671AIPEUR deployments in revenue-critical applications.

What LCD capabilities does the MSP430F67671AIPEUR provide for utility meter displays?

The MSP430F67671AIPEUR features an integrated LCD controller supporting up to 320 segments with programmable contrast control, multiple mux rates (4/8), and built-in charge pump. It drives common LCD glass types used in utility meters without external components - reducing BOM cost and improving reliability for MSP430F67671AIPEUR-based designs targeting UL/EN 62053 certification.

Can the MSP430F67671AIPEUR operate across the full 40–70 Hz line frequency range with a single calibration?

Yes, the MSP430F67671AIPEUR supports 40–70 Hz line frequency operation using a single calibration point - eliminating the need for multiple frequency-specific calibration tables. This capability is implemented in the SD24_B ADC subsystem and validated across production lots, simplifying firmware development and field commissioning for MSP430F67671AIPEUR meters deployed globally.