Texas Instruments MSP430F6749IPEUR

Overview

MSP430F6749IPEUR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four 24-bit sigma-delta ADCs, 512KB flash, 32KB RAM, and support for ANSI C12.20/IEC 62053 compliance in utility revenue metering applications.

For engineers reviewing the MSP430F6749IPEUR datasheet, MSP430F6749IPEUR pinout, MSP430F6749IPEUR application, or MSP430F6749IPEUR equivalent, key selection considerations include its 128-pin LQFP package with 90 I/Os, ultra-low-power LPM3.5 mode (0.34 µA), LCD driver for 320 segments, hardware AES-128 encryption, and dedicated pulse outputs for active/reactive energy calibration.

Technical Context

The MSP430F6749IPEUR integrates a 25-MHz MSP430 CPU with 32-bit multiplier for real-time energy calculations, paired with four independent SD24_B sigma-delta modulators optimized for current/voltage sensing across three phases plus neutral. Its analog front-end supports shunt, CT, and Rogowski coil inputs with digital phase correction and temperature-compensated energy measurement.

It implements six eUSCI modules configurable as UART, SPI, or I²C interfaces, four 16-bit timers with nine capture/compare registers, and a password-protected RTC with crystal offset calibration - all operating within an industrial temperature range of –40°C to 85°C and supply voltage range of 1.8 V to 3.6 V.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, industrial temperature grade (–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 MSP430F6769IPEUR and MSP430F6779IPEUR, the MSP430F6749IPEUR provides optimal balance of metrology precision, security, and display capability for cost-sensitive 3-phase meter designs - delivering full ANSI/IEC compliance with four dedicated SD24_B channels and no compromise on AES-128 or RTC integrity.

Availability

MSP430F6749IPEUR is available at Aetrix Electronics and suitable for smart electricity metering, revenue metering systems, and industrial energy monitoring gateways requiring stable component supply and long-term lifecycle support.

Supply support for MSP430F6749IPEUR 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 specializing in analog and embedded processing technologies, with leadership in low-power microcontrollers and precision metrology solutions.

The MSP430F6749IPEUR belongs to TI's polyphase metering SoC product line, engineered specifically for utility-grade electricity meters that demand high accuracy, regulatory compliance, and robust security in harsh environmental conditions.

FAQ

What is the primary function of the MSP430F6749IPEUR in a smart meter design?

The MSP430F6749IPEUR serves as the core metrology SoC in 3-phase smart meters, performing real-time energy calculation, tariff management, secure data logging, and communication protocol handling. It integrates four 24-bit sigma-delta ADCs, hardware AES-128 encryption, and an LCD controller - enabling full meter functionality without external co-processors. The MSP430F6749IPEUR executes TI's certified energy measurement software library to deliver ANSI C12.20 and IEC 62053 compliance.

Does the MSP430F6749IPEUR support both shunt and current transformer (CT) current sensing?

Yes, the MSP430F6749IPEUR supports multiple sensor types including shunts, current transformers, and Rogowski coils. Its four SD24_B sigma-delta ADCs feature programmable gain, digital phase correction for CT-induced lag, and temperature-compensated measurement - allowing direct interface to either sensor type without external signal conditioning. The MSP430F6749IPEUR's VREF pin accepts a stable external reference to maintain accuracy across varying line conditions.

What low-power modes are available on the MSP430F6749IPEUR, and what are their typical current draws?

The MSP430F6749IPEUR offers multiple low-power modes: LPM3 (standby) draws 2.1 µA at 3 V with RTC active and wake-up in <5 µs; LPM3.5 (RTC mode) consumes 0.34 µA at 3 V; and LPM4.5 (shutdown) uses only 0.18 µA at 3 V. These modes enable extended battery life during AC mains failure while retaining critical functions like timekeeping and display refresh. The MSP430F6749IPEUR's LCD remains operational at just 3 µA in LPM3, preserving user visibility during outages.

How many communication interfaces does the MSP430F6749IPEUR provide, and how are they configured?

The MSP430F6749IPEUR includes six enhanced universal serial communication interfaces (eUSCI), configurable as four UARTs, six SPIs, or two I²C interfaces - with flexible pin mapping across Ports P2–P4. This allows concurrent use of PLC, RF, and optical communication channels in AMI deployments. Each eUSCI supports automatic baud-rate detection and clock timeout, simplifying interoperability with legacy and modern metering infrastructure. The MSP430F6749IPEUR's peripheral mapping eliminates fixed-function pin constraints found in earlier generations.

Is the MSP430F6749IPEUR pin-compatible with other devices in the MSP430F67xx family?

Yes, the MSP430F6749IPEUR shares identical 128-pin LQFP (PEU) package, pinout, and electrical characteristics with MSP430F676x and MSP430F677x variants - including same power, ground, reset, and crystal connections. Differences are limited to unused SD24_B channel pins (SD4–SD6) and internal peripheral enablement, enabling drop-in replacement in existing designs. The MSP430F6749IPEUR maintains full software compatibility with TI's Energy Measurement Library and development tools across the F67xx family.