Texas Instruments MSP430F6766AIPEU

Overview

MSP430F6766AIPEU from Texas Instruments is a polyphase metering SoC designed for high-accuracy energy measurement in 3-phase utility meters. It integrates six 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 256KB flash, 16KB RAM, LCD controller (320 segments), and hardware AES-128 encryption - all in a 128-pin LQFP package. It meets ANSI C12.20 and IEC 62053 standards with <0.1% error over 2000:1 dynamic range.

For engineers reviewing the MSP430F6766AIPEU datasheet, MSP430F6766AIPEU pinout, MSP430F6766AIPEU application, or MSP430F6766AIPEU equivalent, key selection criteria include metrology ADC channel count, RTC tamper detection, ultra-low-power LPM3.5 mode (0.34 µA), and support for shunt/CT/Rogowski sensor interfaces in smart grid metering designs.

Technical Context

The MSP430F6766AIPEU implements a dedicated metrology subsystem with six independent SD24_B sigma-delta modulators, each supporting differential inputs and programmable gain, enabling simultaneous phase A/B/C and neutral current/voltage sampling. Its real-time clock includes crystal offset calibration, temperature compensation, and tamper detection via dedicated pins (RTCCLK, RTCCAP0/1).

Digital subsystem features include four eUSCI_A modules (UART/IrDA/SPI), two eUSCI_B modules (I²C/SPI), three-channel DMA, 16-bit CRC, and four 16-bit timers with nine capture/compare registers - optimized for pulse energy output generation, time-of-use billing, and secure firmware updates in revenue-grade meters.

Key Specifications

Pinout & Package

128-pin LQFP (PEU) package, 20 mm × 14 mm body size, with 90 functional I/O pins including dedicated metrology analog inputs (SDxP/N), LCD segment/com drivers (COM0–COM7, S0–S39), pulse outputs (Sx/COMx), RTC calibration caps (RTCCAP0/1), and dual-system power rails (VASYS1/2, VDSYS1/2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6768AIPEU, the MSP430F6766AIPEU trades one ADC channel for identical security and memory - ideal for fixed 3-phase+neutral metering. Against MSP430F6765AIPEU, it adds AES-128 and doubles flash - essential for certified, upgradable utility meters.

Availability

MSP430F6766AIPEU is available at Aetrix Electronics and suitable for 3-phase electronic watt-hour meters, revenue-grade utility metering, and smart grid energy monitoring requiring stable component supply, long-term lifecycle support, and TI-qualified metrology performance.

Supply support for MSP430F6766AIPEU 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 leadership in low-power microcontrollers and precision metrology solutions.

The MSP430F6766AIPEU belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for ANSI/IEC-certified energy measurement systems - emphasizing accuracy, security, ultra-low-power operation, and integrated LCD support.

FAQ

What metrology standards does the MSP430F6766AIPEU meet?

The MSP430F6766AIPEU meets or exceeds ANSI C12.20 Class 0.1 and IEC 62053-21/22 standards for active and reactive energy measurement. Its <0.1% error over 2000:1 dynamic range, 40–70 Hz line frequency support with single calibration, and digital phase correction for current transformers are validated per these specifications. The device is designed for revenue-grade metering applications where certification is mandatory.

Does the MSP430F6766AIPEU include hardware encryption?

Yes, the MSP430F6766AIPEU integrates a dedicated hardware AES-128 encryption module. This accelerates cryptographic operations for secure firmware updates, encrypted communication (e.g., DLMS/COSEM), and protected data storage - offloading the CPU and ensuring deterministic timing for certification-critical functions. The module supports key wrapping and secure boot verification.

How many independent sigma-delta ADC channels does the MSP430F6766AIPEU have?

The MSP430F6766AIPEU features six independent 24-bit SD24_B sigma-delta ADC channels. Each channel supports differential inputs, programmable gain, and digital filtering - enabling simultaneous high-precision sampling of phase A/B/C and neutral current/voltage signals. This configuration fully supports 3-phase 4-wire metering without external ADCs or multiplexing.

What is the lowest power consumption mode with RTC active on the MSP430F6766AIPEU?

The lowest power mode with RTC active is LPM3.5, consuming just 0.34 µA at 3 V. In this mode, the real-time clock remains fully operational with crystal oscillator, calendar functions, and alarm capability - while CPU, flash, and most peripherals are disabled. This enables >12 months of battery-backed timekeeping during AC mains failure.

Can the MSP430F6766AIPEU drive a 320-segment LCD directly?

Yes, the MSP430F6766AIPEU includes an integrated LCD_C controller supporting up to 320 segments (8 commons × 40 segments). It provides programmable bias, internal charge pump, and software-adjustable contrast - eliminating the need for external LCD drivers or boost converters. Segments S0–S39 and commons COM0–COM7 are mapped to dedicated pins in the PEU package.