Texas Instruments MSP430F67451AIPEUR

Overview

MSP430F67451AIPEUR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four 24-bit sigma-delta ADCs, 128KB flash, 16KB RAM, and ultra-low-power operation (0.18 µA in LPM4.5). It supports ANSI C12.20 and IEC 62053 compliance, 4-quadrant energy measurement, and integrated LCD driver for up to 320 segments.

For engineers reviewing the MSP430F67451AIPEUR datasheet, MSP430F67451AIPEUR pinout, MSP430F67451AIPEUR application, or MSP430F67451AIPEUR equivalent, key selection criteria include metrology accuracy over 2000:1 dynamic range, RTC tamper detection with crystal offset calibration, SD24_B channel count, eUSCI interface configuration (4 UART/IrDA/SPI + 2 SPI/I²C), and 128-pin LQFP package compatibility with existing metering PCB layouts.

Technical Context

The MSP430F67451AIPEUR implements a dedicated metrology subsystem with four independent SD24_B sigma-delta modulators supporting differential inputs and programmable gain, enabling simultaneous voltage/current sampling across three phases plus neutral. Its 25-MHz CPU with 32-bit hardware multiplier executes real-time energy calculations-including active/reactive power, RMS, and phase angle-without external co-processing.

Digital integration includes three-channel DMA for zero-CPU-overhead ADC data transfer, 16-bit CRC for firmware integrity, four Timer_A modules (9 capture/compare registers total), and six eUSCI peripherals-four eUSCI_A (UART/IrDA/SPI) and two eUSCI_B (SPI/I²C)-for dual-protocol communication stacks in smart meter deployments.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, 0.5 mm pitch, 90 GPIOs including dedicated metrology analog inputs, pulse output pins, and LCD segment/common drivers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67451AIPEUR, the MSP430F67461AIPEUR offers headroom for feature-rich firmware upgrades, while the MSP430F67451AIPZ trades I/O count and LCD capacity for compactness-neither is pin-compatible, requiring layout revision for migration.

Availability

MSP430F67451AIPEUR is available at Aetrix Electronics and suitable for 3-phase smart metering, utility revenue metering, and industrial energy monitoring applications requiring stable component supply, long-term lifecycle support, and TI-qualified metrology performance.

Supply support for MSP430F67451AIPEUR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The MSP430F67451AIPEUR 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.

FAQ

What metrology standards does the MSP430F67451AIPEUR comply with?

The MSP430F67451AIPEUR meets or exceeds ANSI C12.20 (Class 0.2) and IEC 62053-22 (Class 0.5S) accuracy requirements for active energy measurement. Its <0.1% error over 2000:1 dynamic range, 4-quadrant operation, and temperature-compensated energy calculations are validated per these standards. The MSP430F67451AIPEUR achieves this using four 24-bit SD24_B ADCs with digital phase correction and calibrated reference paths.

How many analog inputs does the MSP430F67451AIPEUR support for current/voltage sensing?

The MSP430F67451AIPEUR integrates four independent 24-bit sigma-delta ADC channels (SD24_B), each with differential inputs-supporting up to eight analog input terminals (e.g., SD0P0/SD0N0 through SD3P0/SD3N0). These are optimized for current transformers, Rogowski coils, or shunt resistors across three phases and neutral. The MSP430F67451AIPEUR also includes a 10-bit SAR ADC with six external channels for auxiliary measurements like supply voltage or temperature.

Does the MSP430F67451AIPEUR include an integrated LCD driver, and what is its capacity?

Yes, the MSP430F67451AIPEUR features an integrated LCD_C controller supporting up to 320 segments with programmable contrast control and static/multiplexed drive modes. It provides eight COM outputs (COM0–COM7) and up to 40 SEG pins (mapped across ports P1–P7), enabling direct drive of multi-line alphanumeric displays common in utility meters. The MSP430F67451AIPEUR maintains LCD operation in LPM3 mode at just 3 µA, critical for battery backup during mains failure.

What low-power modes are available on the MSP430F67451AIPEUR, and what are their typical currents?

The MSP430F67451AIPEUR offers six low-power modes: LPM3 (2.1 µA at 3 V, RTC active), LPM3.5 (0.34 µA, RTC only), and LPM4.5 (0.18 µA, full shutdown with SRAM/RTC retention). These enable >10-year battery life in backup scenarios. The MSP430F67451AIPEUR achieves ultra-low standby via segmented power gating, automatic clock gating, and optimized SRAM retention circuits-verified per SLAS983A specifications.

Can the MSP430F67451AIPEUR support multiple communication protocols simultaneously?

Yes, the MSP430F67451AIPEUR integrates six enhanced universal serial communication interfaces: four eUSCI_A modules (configurable as UART, IrDA, or SPI) and two eUSCI_B modules (configurable as SPI or I²C). This allows concurrent operation-for example, UART for optical port, SPI for PLC modem, and I²C for secure element-without CPU overhead. The MSP430F67451AIPEUR uses DMA-assisted transfers to sustain full-speed communication on all interfaces during metrology processing.