Texas Instruments MSP430F6768AIPEU

Overview

MSP430F6768AIPEU 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, 512KB flash/16KB RAM, LCD controller (320 segments), and hardware AES-128 encryption - all in a 128-pin LQFP package supporting ANSI C12.20 and IEC 62053 compliance.

For engineers reviewing the MSP430F6768AIPEU datasheet, MSP430F6768AIPEU pinout, MSP430F6768AIPEU application, or MSP430F6768AIPEU equivalent, key selection criteria include its 0.1% accuracy over 2000:1 dynamic range, dedicated pulse outputs for active/reactive energy calibration, ultra-low-power RTC mode (0.34 µA), and support for current transformers, Rogowski coils, or shunt sensors in 3-phase 4-wire star configurations.

Technical Context

The MSP430F6768AIPEU implements a metrology-optimized architecture with seven independent SD24_B modulators (six used) and a 10-bit SAR ADC for auxiliary sensing. Its real-time clock includes tamper detection, crystal offset calibration, and temperature compensation - enabling secure, stable timekeeping during mains failure with <3 µA LPM3 LCD operation.

Digital subsystems include three-channel DMA, four 16-bit timers (nine capture/compare registers), six eUSCI modules (four UART/IrDA/SPI + two SPI/I²C), and integrated CRC-16 - all coordinated by the MSP430 CPU to execute TI's Energy Measurement Software Library for ANSI/IEC-compliant kWh, kVARh, and power quality calculations.

Key Specifications

Pinout & Package

The MSP430F6768AIPEU is housed in a 128-pin LQFP (PEU) package measuring 20 mm × 14 mm, with 90 GPIO pins, dedicated SD24_B analog inputs (SD0P0–SD3N0, SD4P0–SD5N0), pulse output pins (Sx/COMx), and segregated analog/digital power domains (AVCC/AVSS, DVCC/DVSS, VASYS/VDYS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6769AIPEU, the MSP430F6768AIPEU reduces RAM and one sigma-delta channel - lowering cost while retaining full 3-phase+neutral measurement capability; versus MSP430F6768AIPZ, it provides 28 more I/Os and full SD24_B channel set - essential for high-channel-count meter designs requiring maximum flexibility.

Availability

MSP430F6768AIPEU is available at Aetrix Electronics and suitable for smart electricity meters, revenue-grade submetering, and anti-tamper energy monitors requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified production.

Supply support for MSP430F6768AIPEU 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 automotive portfolio coverage.

The MSP430F6768AIPEU belongs to TI's Metrology and Monitoring MCU product line - engineered specifically for high-accuracy, low-power energy measurement in smart grid infrastructure and utility-grade metering systems.

FAQ

What is the primary metrology accuracy specification of the MSP430F6768AIPEU?

The MSP430F6768AIPEU achieves better than 0.1% measurement accuracy over a 2000:1 dynamic range for phase current, meeting ANSI C12.20 and IEC 62053 Class 0.2 standards. This performance is enabled by its six independent 24-bit sigma-delta ADCs, digital phase correction, and temperature-compensated calculation engine - all implemented within the MSP430F6768AIPEU silicon.

Does the MSP430F6768AIPEU support hardware encryption for secure firmware updates?

Yes, the MSP430F6768AIPEU integrates a dedicated hardware AES-128 encryption module that operates independently of the CPU. This allows secure boot, encrypted communication, and protected firmware updates without consuming CPU cycles - a critical feature for utility-grade meters requiring FIPS 140-2 or IEC 62053-31 compliance. The MSP430F6768AIPEU uses this module to safeguard both stored data and runtime operations.

How many independent analog input channels does the MSP430F6768AIPEU provide for current/voltage sensing?

The MSP430F6768AIPEU provides six fully independent 24-bit sigma-delta ADC channels (SD0–SD5), each with differential inputs, plus a 10-bit SAR ADC with six external and two internal channels (supply/temperature). This configuration supports simultaneous sampling of three-phase voltages, three-phase currents, neutral current, and auxiliary parameters - all within a single MSP430F6768AIPEU device.

What low-power modes are available on the MSP430F6768AIPEU for battery-backed operation during AC mains failure?

The MSP430F6768AIPEU supports LPM3 (2.1 µA), LPM3.5 (RTC mode, 0.34 µA), and LPM4.5 (shutdown, 0.18 µA) - enabling >10 years of RTC and LCD operation on a single coin cell during power outages. In LPM3, the MSP430F6768AIPEU maintains full RTC functionality and drives up to 320 LCD segments at 3 µA, ensuring continuous timekeeping and display visibility without AC power.

Is the MSP430F6768AIPEU pin-compatible with other devices in the MSP430F67xxA family?

Yes, the MSP430F6768AIPEU shares identical pinout, package (128-pin LQFP PEU), and peripheral mapping with all other PEU-package variants in the F676xA and F677xA families - including MSP430F6769AIPEU and MSP430F6779AIPEU. This allows hardware reuse across accuracy tiers and memory configurations, with software differentiation handled via flash size and ADC channel enablement in the MSP430F6768AIPEU firmware.