Texas Instruments MSP430F6749AIPEU

Overview

MSP430F6749AIPEU 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 and IEC 62053-compliant metering with <0.1% error over 2000:1 dynamic range.

For engineers reviewing the MSP430F6749AIPEU datasheet, MSP430F6749AIPEU pinout, MSP430F6749AIPEU application, or MSP430F6749AIPEU equivalent, key selection considerations include its 128-pin LQFP package with 90 GPIOs, ultra-low-power LPM3.5 mode (0.34 µA), dedicated pulse output pins for active/reactive energy calibration, and support for shunt/CT/Rogowski sensor interfaces in 3-phase 4-wire star topologies.

Technical Context

The MSP430F6749AIPEU implements a metrology-optimized architecture with seven independent SD24_B modulators in higher-family variants, but this specific variant includes four SD24_B converters for phase A/B/C and neutral current sensing - each supporting differential inputs, programmable gain, and digital phase correction. Its 10-bit SAR ADC provides auxiliary measurements including supply voltage and on-die temperature.

Timing is managed by multiple clock domains: LFXT (32.768 kHz crystal for RTC), HFXT (up to 25 MHz), and internal DCO; all synchronized via the UCS module. The device uses a segmented LCD driver with contrast control and tamper-detect-capable RTC featuring crystal offset calibration and temperature compensation - critical for revenue-grade meter security and long-term accuracy stability.

Key Specifications

Pinout & Package

128-pin LQFP (PEU) package, 20 mm × 14 mm body size, 0.4 mm pitch, 90 configurable I/O pins. Thermal pad exposed on underside per TI mechanical drawing SLAS982A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6769AIPEU, the MSP430F6749AIPEU trades two SD24_B channels for identical RAM capacity - optimizing for 3-phase+neutral accuracy rather than channel count. Against MSP430F6748AIPEU, it doubles RAM to support advanced power quality analytics and larger secure firmware partitions.

Availability

MSP430F6749AIPEU is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, grid-edge IoT nodes, tamper-resistant prepayment systems, and industrial submetering requiring stable component supply across 10+ year product lifecycles.

Supply support for MSP430F6749AIPEU 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 - with over 40 years of leadership in low-power microcontrollers and metrology solutions.

The MSP430F6749AIPEU belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for revenue-grade energy measurement in utility, industrial, and building automation applications - emphasizing accuracy, security, and ultra-low-power operation.

FAQ

What is the maximum line frequency range supported by the MSP430F6749AIPEU for accurate energy measurement?

The MSP430F6749AIPEU supports 40 Hz to 70 Hz line frequency range using a single calibration point - enabling deployment across North American (60 Hz), European (50 Hz), and variable-frequency industrial grids without recalibration. This is achieved through adaptive digital filtering and real-time frequency tracking in the SD24_B modulator firmware.

Does the MSP430F6749AIPEU include hardware acceleration for cryptographic operations?

Yes, the MSP430F6749AIPEU integrates a dedicated hardware AES-128 encryption engine that operates independently of the CPU - allowing secure DLMS/COSEM message encryption, firmware signature verification, and key derivation without impacting metrology computation latency or increasing active-mode current.

How many independent 24-bit sigma-delta ADC channels does the MSP430F6749AIPEU provide?

The MSP430F6749AIPEU provides four independent 24-bit SD24_B sigma-delta ADC channels - configured for phase A, B, C, and neutral current sensing. Each channel supports differential inputs, programmable gain (1×–32×), and digital phase correction - meeting ANSI C12.20 Class 0.2 accuracy requirements.

What LCD configuration does the MSP430F6749AIPEU support for meter displays?

The MSP430F6749AIPEU supports up to 320 segments with 8 commons (COM0–COM7) and flexible multiplexing (static to 1/8 duty) - driving standard 4×32 character or custom graphic LCDs used in utility meters. Contrast is adjustable via internal voltage divider or external resistor network.

Is the MSP430F6749AIPEU pin-compatible with other devices in the MSP430F67xxA family?

Yes, the MSP430F6749AIPEU shares identical 128-pin LQFP (PEU) package pinout with all F67xxA variants in the same package option - including MSP430F6769AIPEU and MSP430F6779AIPEU - enabling drop-in replacement for design reuse, though firmware must be updated to match peripheral configuration differences.