Texas Instruments MSP430F6766IPEU

Overview

MSP430F6766IPEU from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring six 24-bit sigma-delta ADCs, 256KB flash, 16KB RAM, and 90 GPIOs in a 128-pin LQFP package. It delivers <0.1% energy measurement accuracy over 2000:1 dynamic range and meets ANSI C12.20 and IEC 62053 standards for revenue-grade utility metering.

For engineers reviewing the MSP430F6766IPEU datasheet, MSP430F6766IPEU pinout, MSP430F6766IPEU application, or MSP430F6766IPEU equivalent, key selection criteria include its six-channel SD24_B ADC configuration, LQFP-128 package with LCD and pulse output support, ultra-low-power LPM3.5 mode (0.34 µA), and integrated AES-128 encryption for anti-tamper compliance in smart meter deployments.

Technical Context

The MSP430F6766IPEU implements a dedicated metering subsystem with six independent 24-bit sigma-delta modulators supporting differential inputs and programmable gain, enabling simultaneous phase A/B/C and neutral current/voltage sampling. Its 25-MHz CPU with 32-bit hardware multiplier executes TI's energy measurement software library for real-time active/reactive power, RMS, and harmonic calculations.

It integrates dual power domains (AVCC/DVCC), auxiliary supplies (AUXVCC1–3) for backup subsystem operation during AC mains failure, and a tamper-detect-capable RTC with crystal offset calibration. Communication is handled via six eUSCI modules configurable as UART, SPI, or I²C - four eUSCI_A and two eUSCI_B instances - with full pin remapping support across ports P2–P4.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, 0.5 mm pitch, with 90 general-purpose I/O pins and dedicated analog/energy measurement signal routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6768IPEU and MSP430F6767IPEU, the MSP430F6766IPEU provides optimal balance of flash (256KB), RAM (16KB), and metrology peripherals for cost-sensitive Class 0.2 meters - avoiding over-provisioning while maintaining full compliance with ANSI/IEC standards and TI's energy measurement library.

Availability

MSP430F6766IPEU is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and AMI endpoint development requiring stable component supply and long-term lifecycle support.

Supply support for MSP430F6766IPEU 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 decades of utility metering domain expertise.

The MSP430F676x family was engineered specifically for polyphase revenue metering, integrating metrology-grade ADCs, secure crypto engines, and ultra-low-power operation to reduce bill-of-materials and accelerate certification to ANSI C12.20 and IEC 62053 standards.

FAQ

What is the maximum number of sigma-delta ADC channels supported by the MSP430F6766IPEU?

The MSP430F6766IPEU integrates six independent 24-bit sigma-delta ADCs (SD24_B) with differential inputs and programmable gain. This configuration enables simultaneous sampling of three-phase voltage/current plus neutral, satisfying ANSI C12.20 Class 0.2 accuracy requirements for 3-phase 4-wire metering applications without external ADCs.

Does the MSP430F6766IPEU include hardware encryption capabilities?

Yes, the MSP430F6766IPEU includes a dedicated hardware AES-128 encryption module. This accelerator offloads cryptographic operations from the CPU, enabling secure firmware updates, encrypted data logging, and DLMS/COSEM protocol compliance while maintaining deterministic real-time performance and minimizing power consumption during security-critical tasks.

What low-power modes are available on the MSP430F6766IPEU, and what is the lowest current draw?

The MSP430F6766IPEU supports multiple low-power modes including LPM3 (2.1 µA), LPM3.5 (0.34 µA), and LPM4.5 (0.18 µA) at 3 V. LPM4.5 disables all clocks and retains only RTC and tamper-detect registers, making it ideal for battery-backed operation during AC mains failure in utility meter applications.

Can the MSP430F6766IPEU drive an LCD display directly?

Yes, the MSP430F6766IPEU features an integrated LCD_C controller supporting up to 320 segments with programmable contrast control and internal charge pump. It drives multiplexed LCD glass directly via COM0–COM7 and segment pins (e.g., P1.6/COM2), eliminating the need for external display drivers in front-panel meter designs.

What communication interfaces does the MSP430F6766IPEU support for smart meter connectivity?

The MSP430F6766IPEU provides six enhanced USCI (eUSCI) modules: four eUSCI_A (configurable as UART, IrDA, or SPI) and two eUSCI_B (configurable as SPI or I²C). These support HAN interfaces such as M-Bus, PLC, RF mesh, and RS-485 modems, with full pin remapping across ports P2–P4 for flexible PCB layout.