Texas Instruments MSP430F6746IPEUR

Overview

MSP430F6746IPEUR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four 24-bit sigma-delta ADCs, 256KB flash, 16KB RAM, and ultra-low-power operation (0.18 µA in LPM4.5). It supports ANSI C12.20 and IEC 62053 compliance, four-quadrant energy measurement, and integrated LCD driver for up to 320 segments.

For engineers reviewing the MSP430F6746IPEUR datasheet, MSP430F6746IPEUR pinout, MSP430F6746IPEUR application, or MSP430F6746IPEUR equivalent, key selection criteria include phase current accuracy (<0.1% over 2000:1), dedicated pulse output pins for active/reactive energy calibration, digital phase correction for CTs, and support for shunt/CT/Rogowski sensor inputs in utility-grade metering systems.

Technical Context

The MSP430F6746IPEUR integrates seven peripheral subsystems optimized for revenue metering: a 25-MHz ultra-low-power CPU with 32-bit hardware multiplier, four independent SD24_B sigma-delta ADCs (24-bit resolution, differential inputs, programmable gain), a system 10-bit ADC with six external channels plus temperature/supply sensing, AES-128 encryption engine, RTC with crystal offset calibration, and six enhanced eUSCI modules configurable as UART/SPI/I²C.

Its power architecture includes dual-domain supply management (DVCC/AVCC/VASYS/VCORE), auxiliary supplies (AUXVCC1–3) for backup subsystem operation, and five low-power modes-LPM3 (2.1 µA), LPM3.5 (0.34 µA), and LPM4.5 (0.18 µA)-enabling >10-year battery life in mains-failure scenarios while retaining critical metering data and RTC functionality.

Key Specifications

Pinout & Package

128-pin LQFP (PEU) package, 20 mm × 14 mm body size, 0.5 mm pitch, 90 general-purpose I/O pins. Thermal pad exposed on underside for enhanced heat dissipation in sealed meter enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6746IPZ, the MSP430F6746IPEUR offers 28 more I/Os and full SD24_B pin availability for maximum flexibility in high-channel-count designs; versus MSP430F6766IPEUR, it trades two sigma-delta channels for lower cost and power in standard 3-phase+neutral configurations.

Availability

MSP430F6746IPEUR is available at Aetrix Electronics and suitable for utility metering, industrial energy monitoring, and grid-edge DER metering requiring stable component supply, long-term lifecycle support, and TI-qualified metrology performance.

Supply support for MSP430F6746IPEUR 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 delivering analog and embedded processing solutions for industrial, automotive, and consumer applications.

The MSP430F6746IPEUR belongs to TI's polyphase metering SoC product line, engineered specifically for revenue-grade electricity meters that must meet ANSI C12.20 and IEC 62053 standards with minimal external components and ultra-low standby power.

FAQ

What is the maximum number of analog input channels supported by the MSP430F6746IPEUR?

The MSP430F6746IPEUR supports four independent 24-bit sigma-delta ADCs (SD24_B) with differential inputs, plus a separate 10-bit ADC with six external channels. This enables simultaneous acquisition of up to three phase currents, neutral current, three phase voltages, and auxiliary signals such as temperature or supply voltage-all within a single MSP430F6746IPEUR device.

Does the MSP430F6746IPEUR support ANSI C12.20 and IEC 62053 certification out of the box?

Yes-the MSP430F6746IPEUR is architected to meet ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S accuracy requirements. Its <0.1% error over 2000:1 dynamic range, digital phase correction, temperature-compensated energy calculations, and 40–70 Hz line frequency support allow certified meter designs without external calibration hardware when used with TI's energy measurement software library.

What low-power modes are available on the MSP430F6746IPEUR, and what is the lowest current draw?

The MSP430F6746IPEUR offers five low-power modes: LPM0–LPM4.5. The deepest mode is LPM4.5 (shutdown mode), drawing just 0.18 µA at 3 V while retaining RTC operation, security keys, and critical metering registers. Wake-up from LPM4.5 occurs in <5 µs, enabling rapid response to tamper events or communication interrupts without compromising battery life.

Can the MSP430F6746IPEUR drive a 320-segment LCD directly?

Yes-the MSP430F6746IPEUR integrates an LCD_C controller supporting up to 320 segments with software-configurable bias, duty, and contrast. It drives common outputs (COM0–COM7) and segment lines directly, eliminating the need for external LCD drivers or charge pumps. The LCDCAP pin supports external capacitor tuning for optimal contrast stability across temperature.

Is the MSP430F6746IPEUR pin-compatible with other devices in the MSP430F67xx family?

Yes-the MSP430F6746IPEUR shares the same 128-pin LQFP (PEU) package, pinout, and electrical characteristics with all MSP430F67xxIPEU variants (e.g., MSP430F6766IPEUR, MSP430F6779IPEUR). This enables hardware reuse across meter tiers: upgrade flash/RAM/ADC count via firmware and minor BOM changes while retaining PCB layout and mechanical design.