Texas Instruments MSP430F6768IPEU

Overview

MSP430F6768IPEU from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring six 24-bit sigma-delta ADCs, 512KB flash, 16KB RAM, and <0.1% energy measurement accuracy over 2000:1 dynamic range. It integrates LCD controller (320 segments), AES-128 encryption, RTC with temperature compensation, and supports ANSI C12.20/IEC 62053 compliance in utility metering systems.

For engineers reviewing the MSP430F6768IPEU datasheet, MSP430F6768IPEU pinout, MSP430F6768IPEU application, or MSP430F6768IPEU equivalent, key selection criteria include sigma-delta ADC channel count, on-chip energy calculation capability, RTC security features, low-power standby current (2.1 µA in LPM3), and 128-pin LQFP package I/O count (90 pins).

Technical Context

This SoC executes TI's energy measurement software library to compute active/reactive energy, four-quadrant power, and phase angle per phase using dedicated hardware sigma-delta modulators and digital signal processing. Its ultra-low-power architecture enables operation down to 1.8 V with multiple LPM modes, including LPM3.5 (0.34 µA) and LPM4.5 (0.18 µA), supporting backup operation during AC mains failure.

The device implements seven communication interfaces-four UART, six SPI, and two I²C-fully configurable across six eUSCI modules, and includes a 25-MHz CPU with 32-bit hardware multiplier for real-time tariff management and AMR/AMI protocol handling without external co-processors.

Key Specifications

Pinout & Package

128-pin LQFP (PEU) package, 20 mm × 14 mm body size, with 90 general-purpose I/O pins, dedicated sigma-delta analog inputs (SDxP/N), auxiliary supply rails (AUXVCC1–3), and LCD segment/common drivers (COM0–COM7, S0–S39).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6769IPEU, the MSP430F6768IPEU trades RAM capacity for cost optimization while retaining full metrology performance; versus MSP430F6767IPEU, it delivers higher flash density for complex tariff engines and secure boot code without sacrificing ADC resources or low-power behavior.

Availability

MSP430F6768IPEU is available at Aetrix Electronics and suitable for smart electricity metering, industrial energy monitoring, and grid-tie inverter verification requiring stable component supply, long lifecycle support, and metrological traceability.

Supply support for MSP430F6768IPEU 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 broad industrial and energy infrastructure focus.

The MSP430F676x family is engineered specifically for revenue-grade polyphase metering, integrating metrology-grade ADCs, secure real-time processing, and ultra-low-power operation to replace discrete metering solutions with single-chip SoCs.

FAQ

What is the maximum number of independent sigma-delta ADC channels supported by the MSP430F6768IPEU?

The MSP430F6768IPEU supports six independent 24-bit sigma-delta ADC channels (SD24_B), each with differential inputs and programmable gain. This configuration enables simultaneous sampling of three-phase voltage/current and neutral current in 3-phase 4-wire metering topologies without external multiplexing or additional converters. The MSP430F6768IPEU uses these channels to meet ANSI C12.20 Class 0.1 accuracy requirements.

Does the MSP430F6768IPEU include hardware acceleration for cryptographic operations?

Yes, the MSP430F6768IPEU integrates a dedicated hardware AES-128 encryption module that performs encryption and decryption independently of the CPU. This enables secure firmware updates, protected tariff data storage, and authenticated communication in AMI deployments without degrading real-time metering performance. The MSP430F6768IPEU leverages this module to satisfy utility cybersecurity mandates.

What low-power mode current does the MSP430F6768IPEU achieve in RTC-only operation?

In RTC Mode (LPM3.5), the MSP430F6768IPEU draws only 0.34 µA at 3 V, maintaining accurate timekeeping, calendar functions, and tamper-detection logic while powering down the CPU, flash, and most peripherals. This ultra-low current extends backup battery life significantly during AC mains failure. The MSP430F6768IPEU achieves this via isolated auxiliary supply domains (AUXVCC3) and optimized RTC oscillator circuitry.

How many I/O pins are available on the MSP430F6768IPEU in its 128-pin LQFP package?

The MSP430F6768IPEU provides 90 general-purpose I/O pins in its 128-pin LQFP (PEU) package. These include dedicated LCD segment/common drivers (up to 320 segments), sigma-delta analog inputs, communication interface signals (UART/SPI/I²C), and tamper-detect GPIOs. Pin mapping is consistent across the F676x family in the PEU package, ensuring layout compatibility when upgrading between variants like MSP430F6768IPEU and MSP430F6769IPEU.

What industry standards does the MSP430F6768IPEU support for energy metering compliance?

The MSP430F6768IPEU meets or exceeds ANSI C12.20 (2015) and IEC 62053-21/22 (Class 0.2S/0.5S) accuracy requirements for active and reactive energy measurement. Its <0.1% error over 2000:1 dynamic range, temperature-compensated calculations, and digital phase correction are validated for use in revenue-grade 3-phase meters. The MSP430F6768IPEU implements these standards via on-chip hardware and TI's certified energy measurement software library.