Texas Instruments MSP430F6745AIPEUR

Overview

MSP430F6745AIPEUR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four independent 24-bit sigma-delta ADCs with <0.1% accuracy over 2000:1 dynamic range, integrated LCD controller (320 segments), AES-128 encryption, and ultra-low-power RTC mode (0.34 µA at 3 V). It supports ANSI C12.20 and IEC 62053 compliance in utility metering applications.

For engineers reviewing the MSP430F6745AIPEUR datasheet, MSP430F6745AIPEUR pinout, MSP430F6745AIPEUR application, or MSP430F6745AIPEUR equivalent, key selection criteria include its 128-pin LQFP package with 90 GPIOs, dual power supply architecture (AVCC/DVCC), SD24_B ADC channel count, flash/RAM sizing (128KB/16KB), and support for three-phase + neutral energy measurement with digital phase correction.

Technical Context

The MSP430F6745AIPEUR implements a dedicated metrology subsystem with four SD24_B modulators feeding independent 24-bit sigma-delta converters, each configurable for current transformer, Rogowski coil, or shunt sensor inputs. Its CPU performs real-time energy calculations using hardware-accelerated arithmetic including a 32-bit multiplier.

It integrates six eUSCI modules (four UART/IrDA/SPI-capable, two SPI/I²C-capable), three-channel DMA, and tamper-detect RTC with crystal offset calibration. Power management includes LPM3 (2.1 µA), LPM3.5 (0.34 µA), and LPM4.5 (0.18 µA) modes, enabling extended backup operation during AC mains failure.

Key Specifications

Pinout & Package

128-pin LQFP (PEU) package, 20 mm × 14 mm body size, with 90 general-purpose I/O pins supporting multiplexed functions including SD24_B analog inputs, eUSCI serial interfaces, LCD segment/common drivers, and metrology-specific pulse outputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6745AIPEUR, MSP430F6746AIPEUR offers double flash/RAM for advanced communication stacks, while MSP430F6765AIPEUR adds two extra SD24_B channels - both retain identical pinout, power profile, and metrology accuracy, enabling reuse of layout and calibration routines.

Availability

MSP430F6745AIPEUR is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade submetering, and industrial power quality monitoring requiring stable component supply and long-term lifecycle support.

Supply support for MSP430F6745AIPEUR 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 MSP430F67xxA family targets energy measurement and power monitoring applications, integrating high-accuracy sigma-delta ADCs, secure processing, and ultra-low-power operation specifically for smart grid and utility metering systems.

FAQ

What is the maximum dynamic range supported by the MSP430F6745AIPEUR's sigma-delta ADCs?

The MSP430F6745AIPEUR features four 24-bit SD24_B sigma-delta ADCs achieving <0.1% accuracy over a 2000:1 dynamic range. This enables precise measurement of current from milliamp standby loads to hundreds-of-amps peak demand without range switching - critical for meeting ANSI C12.20 Class 0.2 accuracy requirements in revenue meters.

Does the MSP430F6745AIPEUR support external reference voltage for the SD24_B modulators?

Yes, the MSP430F6745AIPEUR accepts an external 2.5 V reference via the VREF pin (Pin 113), which directly biases all four SD24_B modulators. Using an external precision reference improves long-term stability and temperature drift performance compared to the internal bandgap, enhancing metrology accuracy in field-deployed meters.

How many LCD segments can the MSP430F6745AIPEUR drive, and what is the segment drive capability?

The MSP430F6745AIPEUR integrates an LCD controller supporting up to 320 segments using eight commons (COM0–COM7) and 40 segment lines. It provides programmable contrast control and internal charge pump - eliminating need for external bias circuitry and enabling direct connection to standard 320-segment LCD glass used in utility meters.

What low-power modes are available on the MSP430F6745AIPEUR, and what is the RTC current draw?

The MSP430F6745AIPEUR supports LPM3 (2.1 µA), LPM3.5 (0.34 µA), and LPM4.5 (0.18 µA) modes. In LPM3.5, the real-time clock remains active with crystal oscillator running - enabling time-stamped event logging and wake-up scheduling while consuming only 0.34 µA at 3 V, extending coin-cell backup life beyond one year.

Is the MSP430F6745AIPEUR pin-compatible with other devices in the MSP430F67xxA family?

Yes, the MSP430F6745AIPEUR in the 128-pin LQFP (PEU) package shares identical pinout with all other PEU-packaged F67xxA variants, including MSP430F6746AIPEUR, MSP430F6765AIPEUR, and MSP430F6779AIPEUR. Signal mapping, power domains, and peripheral pin assignments are fully compatible - enabling hardware reuse across meter tiers.