Texas Instruments MSP430F6749AIPEUR

Overview

MSP430F6749AIPEUR from Texas Instruments is a polyphase metering SoC designed for high-accuracy energy measurement in 3-phase utility meters. It integrates four 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 512KB flash, 32KB RAM, LCD controller (320 segments), and hardware AES-128 encryption - enabling ANSI C12.20/IEC 62053-compliant metering with <0.1% error over 2000:1 dynamic range.

For engineers reviewing the MSP430F6749AIPEUR datasheet, MSP430F6749AIPEUR pinout, MSP430F6749AIPEUR application, or MSP430F6749AIPEUR equivalent, key selection criteria include its 128-pin LQFP package, 90 GPIOs, ultra-low-power LPM3.5 mode (0.34 µA), dedicated pulse output pins for active/reactive energy calibration, and support for current transformers, Rogowski coils, and shunt sensors in 3-phase 4-wire star configurations.

Technical Context

The MSP430F6749AIPEUR implements a metrology-specific architecture with independent SD24_B modulators per phase input, digital phase correction logic for CT-based measurements, and temperature-compensated energy calculation firmware executed on its 25-MHz CPU. Its analog front-end supports simultaneous sampling across up to four current/voltage channels with programmable gain and differential inputs.

Digital subsystems include three-channel DMA for zero-CPU-overhead data transfer from ADCs to memory, six eUSCI modules (four UART/IrDA/SPI + two SPI/I²C), RTC with tamper detection and crystal offset calibration, and integrated hardware CRC-16 and AES-128 engines for secure firmware updates and data integrity in smart grid deployments.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, 0.5 mm pitch, 90 configurable I/O pins including dedicated metrology analog inputs (SDxP/N), pulse outputs (Sx), COM lines for LCD, and auxiliary supply rails (AUXVCCx, VASYSx, VDSYSx).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6748AIPEUR, the MSP430F6749AIPEUR adds hardware AES-128 and 16 KB more RAM for secure firmware and tariff storage; compared with MSP430F6769AIPEUR, it trades two SD24_B channels for lower cost while retaining full 3-phase metrology capability - making it optimal for cost-constrained ANSI/IEC revenue meters.

Availability

MSP430F6749AIPEUR is available at Aetrix Electronics and suitable for 3-phase electronic watt-hour meters, utility metering infrastructure, and energy monitoring systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for global smart grid deployments.

Supply support for MSP430F6749AIPEUR 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 and embedded processing solutions, with deep expertise in low-power microcontrollers and precision metrology ICs.

The MSP430F6749AIPEUR belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for high-accuracy, ultra-low-power energy measurement in smart meters and grid-edge devices - balancing computational performance, analog precision, and security in a single SoC.

FAQ

What metrology standards does the MSP430F6749AIPEUR support?

The MSP430F6749AIPEUR meets or exceeds ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S accuracy requirements. Its 24-bit sigma-delta ADCs, digital phase correction, and temperature-compensated energy calculation engine ensure compliance across 40–70 Hz line frequencies with <0.1% error over 2000:1 dynamic range - validated per both standards' test procedures.

Does the MSP430F6749AIPEUR include hardware encryption?

Yes, the MSP430F6749AIPEUR integrates a dedicated hardware AES-128 encryption module. This enables fast, deterministic encryption of meter data and firmware images without CPU overhead - supporting DLMS/COSEM secure communication profiles and preventing unauthorized firmware updates or credential cloning in revenue-critical applications.

How many analog input channels does the MSP430F6749AIPEUR support for energy measurement?

The MSP430F6749AIPEUR supports four independent 24-bit sigma-delta ADC channels (SD0–SD3) with differential inputs and programmable gain. These are configured for simultaneous voltage and current sensing across three phases plus neutral in standard 3-phase 4-wire star topologies - sufficient for full metrology functionality without external signal conditioning.

What is the lowest power consumption mode of the MSP430F6749AIPEUR with RTC active?

In RTC mode (LPM3.5), the MSP430F6749AIPEUR consumes just 0.34 µA at 3 V while maintaining real-time clock operation, calendar functions, and wake-up capability. This enables >10-year battery backup life in mains-failure scenarios - critical for uninterrupted time-stamped event logging and secure time-based tariff enforcement.

Is the MSP430F6749AIPEUR pin-compatible with other devices in the F67xxA family?

Yes, the MSP430F6749AIPEUR shares identical 128-pin LQFP (PEU) package pinout and footprint with all F677xA, F676xA, and F674xA variants in the same package option. Signal mapping for metrology ADC inputs (SDxP/N), pulse outputs (Sx), and LCD commons (COMx) is consistent - enabling hardware reuse across performance tiers with only firmware and BOM changes.