Texas Instruments MSP430F67751IPEUR

Overview

MSP430F67751IPEUR from Texas Instruments is a polyphase metering SoC designed for revenue-grade 3-phase electronic watt-hour meters. It integrates seven 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 128KB flash, 16KB RAM, LCD controller (320 segments), and real-time clock with temperature compensation - delivering <0.1% energy measurement accuracy over 2000:1 dynamic range in utility metering applications.

For engineers reviewing the MSP430F67751IPEUR datasheet, MSP430F67751IPEUR pinout, MSP430F67751IPEUR application, or MSP430F67751IPEUR equivalent, key selection criteria include ANSI C12.20/IEC 62053 compliance, ultra-low-power LPM3.5 mode (0.34 µA), dedicated pulse outputs for active/reactive energy calibration, and support for CT/Rogowski/shunt sensors in 3-phase 4-wire star topologies.

Technical Context

The MSP430F67751IPEUR implements TI's high-precision 24-bit SD24_B ADC subsystem with differential inputs, programmable gain, and digital phase correction for current transformers. Its energy measurement engine executes TI's certified energy library, enabling four-quadrant per-phase power calculation, exact phase angle measurement, and temperature-compensated kWh/kVARh accumulation across 40–70 Hz line frequencies using single-point calibration.

System-level integration includes six eUSCI modules configurable as UART/I²C/SPI, four 16-bit timers with nine capture/compare registers, password-protected RTC with crystal offset calibration, and anti-tamper security modules. Power architecture supports flexible supply options with automatic switching and backup subsystem (AUXVCC3) enabling 3 µA LCD operation during AC mains failure.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, 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 applications.

Compared with MSP430F67761IPEUR, the MSP430F67751IPEUR trades flash capacity for lower unit cost while retaining identical metrology performance and pin compatibility; versus MSP430F67651IPEUR, it adds the seventh SD24_B channel required for full 3-phase 4-wire neutral current compliance.

Availability

MSP430F67751IPEUR is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and AMI gateway node development requiring stable component supply and long-term industrial lifecycle support.

Supply support for MSP430F67751IPEUR 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 applications.

The MSP430F677x1 product line is engineered specifically for revenue metering systems - integrating metrology-grade ADCs, low-power processing, and utility-compliant peripherals to minimize external components and accelerate ANSI/IEC-certified meter design.

FAQ

What is the maximum dynamic range supported by the MSP430F67751IPEUR for accurate energy measurement?

The MSP430F67751IPEUR achieves <0.1% accuracy over a 2000:1 dynamic range, validated per ANSI C12.20 and IEC 62053-22 standards. This performance is enabled by its seven 24-bit sigma-delta ADCs with programmable gain and digital phase correction, allowing precise measurement from light-load standby conditions up to full-scale rated current without range switching. The MSP430F67751IPEUR maintains this specification across the full industrial temperature range (–40°C to +85°C) and 40–70 Hz line frequency band.

Does the MSP430F67751IPEUR support dedicated pulse outputs for energy calibration?

Yes, the MSP430F67751IPEUR features two dedicated open-drain pulse output pins: one for active energy (kWh) and one for reactive energy (kVARh). These outputs comply with IEC 62053-31 pulse specifications and are fully programmable for pulse width, frequency scaling, and polarity. They interface directly with LED drivers or optocouplers for field calibration and verification - a core requirement for revenue meter type approval. The MSP430F67751IPEUR generates these pulses in hardware without CPU intervention, ensuring deterministic timing.

What low-power modes are available on the MSP430F67751IPEUR, and what is the current draw in RTC-only operation?

The MSP430F67751IPEUR offers multiple low-power modes including LPM3 (standby, 2.1 µA), LPM3.5 (RTC-only, 0.34 µA at 3 V), and LPM4.5 (shutdown, 0.18 µA at 3 V). In LPM3.5, only the RTC, backup RAM, and associated oscillators remain active - enabling timekeeping and critical register retention during AC mains failure. The MSP430F67751IPEUR sustains this mode using AUXVCC3, supporting 3 µA LCD operation concurrently. Wake-up from LPM3.5 occurs in <5 µs, preserving billing continuity and event timestamping integrity.

How many independent sigma-delta ADC channels does the MSP430F67751IPEUR integrate, and what is their resolution?

The MSP430F67751IPEUR integrates seven independent 24-bit sigma-delta ADC channels (SD24_B module), each with differential inputs, programmable gain (1× to 32×), and built-in offset/gain calibration. These channels support simultaneous sampling of three-phase voltages, three-phase currents, neutral current, and reference voltage - enabling full 3-phase 4-wire metrology. The MSP430F67751IPEUR's SD24_B subsystem delivers >110 dB SNR and <0.1% error over 2000:1 dynamic range, meeting Class 0.2 accuracy without external precision references.

Is the MSP430F67751IPEUR pin-compatible with other devices in the MSP430F677x1 family?

Yes, the MSP430F67751IPEUR is fully pin-compatible with all 128-pin LQFP (PEU) variants in the MSP430F677x1 family, including MSP430F67761IPEUR and MSP430F67771IPEUR. All share identical pin mapping, power domains, and peripheral signal assignments. Firmware and PCB designs can be reused across the family - differing only in flash/RAM size and SD24_B channel count. The MSP430F67751IPEUR uses the same 128-pin PEU package footprint and thermal profile, enabling drop-in replacement during design optimization or cost scaling.