Texas Instruments MSP430F6745IPZ

Overview

MSP430F6745IPZ 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 support for ANSI C12.20/IEC 62053 compliance in utility revenue metering applications.

For engineers reviewing the MSP430F6745IPZ datasheet, MSP430F6745IPZ pinout, MSP430F6745IPZ application, or MSP430F6745IPZ equivalent, key selection criteria include its 100-pin LQFP package, 4-channel SD24_B ADC architecture, ultra-low-power LPM3.5 mode (0.34 µA), LCD driver for up to 320 segments, and integrated AES-128 encryption for anti-tamper security in smart meter deployments.

Technical Context

The MSP430F6745IPZ implements a dedicated energy measurement subsystem with four independent 24-bit sigma-delta modulators (SD24_B) optimized for current/voltage sensing across three phases plus neutral, each supporting differential inputs and programmable gain. Its 25-MHz CPU with 32-bit hardware multiplier executes TI's certified energy measurement library for active/reactive power, RMS, and harmonic calculations.

It integrates dual auxiliary supply domains (AUXVCC1–AUXVCC3) for isolated analog front-end biasing, RTC with crystal offset calibration and temperature compensation, and six enhanced eUSCI modules configurable as UART/SPI/I²C - all operating within –40°C to 85°C industrial temperature range and 1.8–3.6 V supply.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, 0.5 mm pitch, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6745IPZ, MSP430F6746IPZ offers double flash/RAM for complex AMI protocols, while MSP430F6765IPZ adds two extra SD24_B channels for expanded sensor coverage - both retain identical LQFP-100 packaging, power profiles, and security features for drop-in hardware reuse.

Availability

MSP430F6745IPZ is available at Aetrix Electronics and suitable for utility metering, industrial energy monitoring, and smart grid endpoint applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for global certification programs.

Supply support for MSP430F6745IPZ 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 for industrial, automotive, and consumer markets.

The MSP430F67xx family is designed specifically for revenue-grade polyphase electricity meters, integrating metrology ADCs, low-power processing, secure communications, and LCD drivers into a single SoC to reduce BOM cost and accelerate ANSI/IEC certification.

FAQ

What metrology standards does the MSP430F6745IPZ support out of the box?

The MSP430F6745IPZ executes TI's Energy Measurement Library (EML) v3.x, which is pre-validated for ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S compliance. Its four 24-bit sigma-delta ADCs deliver < 0.1% error over 2000:1 dynamic range, and digital phase correction compensates for CT-induced errors - enabling full certification without custom algorithm development. The MSP430F6745IPZ also supports 40–70 Hz line frequency with single-point calibration.

Does the MSP430F6745IPZ support LCD display driving?

Yes, the MSP430F6745IPZ integrates a full-featured LCD_C peripheral supporting up to 320 segments with programmable contrast control, internal charge pump, and static/multiplexed (4/8-backplane) modes. It drives standard STN/FSTN LCDs directly - eliminating external display controllers. Pins COM0–COM7 and SEGx provide native segment/common outputs, and LCDCAP/R33 enables external capacitor tuning for optimal contrast stability across temperature. This capability is fully operational in LPM3 mode at 3 µA.

How many independent sigma-delta ADC channels does the MSP430F6745IPZ have?

The MSP430F6745IPZ includes four independent 24-bit SD24_B sigma-delta modulators, each with differential inputs, programmable gain (1× to 32×), and dedicated data registers. These channels are mapped to SD0P0/SD0N0 through SD3P0/SD3N0 and support simultaneous sampling for three-phase voltage/current and neutral current measurement. Unlike higher-tier variants (e.g., MSP430F6765IPZ), the MSP430F6745IPZ does not include additional SD24_B channels beyond these four.

What low-power modes are available on the MSP430F6745IPZ and their typical current draw?

The MSP430F6745IPZ supports seven low-power modes: LPM3 (standby, 2.1 µA), LPM3.5 (RTC active, 0.34 µA), and LPM4.5 (shutdown, 0.18 µA) at 3 V - all retaining RAM and RTC content. In LPM3, the device wakes in < 5 µs for interrupt-driven metrology sampling. The LCD remains functional in LPM3 at 3 µA. These values are measured per TI SLAS768E datasheet Rev. September 2018 and apply to the 100-pin PZ package variant MSP430F6745IPZ specifically.

Is the MSP430F6745IPZ pin-compatible with other devices in the F67xx family?

Yes, the MSP430F6745IPZ shares identical pinout and electrical characteristics with all other 100-pin LQFP (PZ) variants in the F674x/F676x/F677x families, including MSP430F6746IPZ, MSP430F6765IPZ, and MSP430F6775IPZ. Pin functions (e.g., SD0P0, COM0, XIN) and power domains (AUXVCC1–AUXVCC3, VASYS1/2) are consistent across the PZ package group, enabling hardware reuse and firmware scalability. However, feature availability (e.g., number of SD24_B channels) varies by part number and is enabled/disabled in software.