Texas Instruments MSP430F6765IPEU

Overview

MSP430F6765IPEU from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring six 24-bit sigma-delta ADCs, 128KB 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 MSP430F6765IPEU datasheet, MSP430F6765IPEU pinout, MSP430F6765IPEU application, or MSP430F6765IPEU equivalent, key selection criteria include its 128-pin LQFP package with 90 GPIOs, 24-bit SD24_B ADC accuracy <0.1% over 2000:1 dynamic range, RTC with temperature compensation, AES-128 encryption, and support for current transformers, Rogowski coils, or shunt sensors in utility metering systems.

Technical Context

The MSP430F6765IPEU integrates a 25-MHz MSP430 CPU with 32-bit hardware multiplier for real-time energy calculations and tariff management. Its analog front end includes six independent 24-bit sigma-delta modulators with differential inputs and programmable gain, plus a system 10-bit 200-ksps ADC for auxiliary sensing.

Digital subsystems comprise six enhanced eUSCI modules configurable as UART, SPI, or I²C interfaces; four 16-bit timers with nine capture/compare registers; and an LCD controller with contrast control. Power management enables multiple low-power modes including LPM3.5 (0.34 µA) and LPM4.5 (0.18 µA), with automatic supply switching between main and backup rails.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6765IPEU, the F6766IPEU offers greater flash capacity for complex tariff engines, while the F6765IPZ trades I/O count and package size for lower assembly cost - both retain identical metrology performance and low-power behavior.

Availability

MSP430F6765IPEU 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 MSP430F6765IPEU 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The MSP430F6765IPEU belongs to TI's polyphase metering SoC product line, engineered specifically for revenue-grade 3-phase watt-hour meters that demand high accuracy, ultra-low standby power, and integrated security in minimal external component count.

FAQ

What is the maximum dynamic range accuracy of the MSP430F6765IPEU's sigma-delta ADCs?

The MSP430F6765IPEU achieves <0.1% energy measurement accuracy over a 2000:1 dynamic range, verified per ANSI C12.20 and IEC 62053-22 standards. This performance is enabled by its six 24-bit SD24_B modulators with digital phase correction and temperature compensation - critical for maintaining Class 0.2 metering accuracy across load variations from light-load to full-scale current.

Does the MSP430F6765IPEU support external crystal oscillators for the real-time clock?

Yes, the MSP430F6765IPEU supports a 32.768-kHz external crystal oscillator connected to XIN/XOUT pins. Its RTC module includes crystal offset calibration and temperature compensation features, ensuring ±2 ppm timing accuracy across –40°C to +85°C - essential for accurate time-of-use tariff metering and event timestamping in the MSP430F6765IPEU.

How many communication interfaces does the MSP430F6765IPEU provide, and what configurations are supported?

The MSP430F6765IPEU integrates six enhanced eUSCI modules: four configurable as UART, IrDA, or SPI; and two configurable as SPI or I²C. These support simultaneous use - for example, UART for AMI communication, I²C for EEPROM or sensor interface, and SPI for secure element or display driver - enabling flexible system architecture without external bus expanders in the MSP430F6765IPEU.

What low-power modes are available on the MSP430F6765IPEU, and what is the lowest current draw?

The MSP430F6765IPEU offers five low-power modes: LPM0–LPM4.5. The deepest mode is LPM4.5 (shutdown), drawing only 0.18 µA at 3 V while retaining RTC operation and backup RAM contents. Wake-up occurs in <5 µs from LPM3, making the MSP430F6765IPEU ideal for battery-backed meters requiring multi-year operation during mains failure.

Is hardware-based AES-128 encryption included in the MSP430F6765IPEU?

Yes, the MSP430F6765IPEU includes a dedicated hardware AES-128 encryption module. It operates independently of the CPU, enabling secure firmware updates, encrypted communication payloads, and tamper-proof data storage without impacting real-time metrology performance - a core security feature required for modern smart meter certification in the MSP430F6765IPEU.