Texas Instruments MSP430F6765AIPZR

Overview

MSP430F6765AIPZR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters. It integrates six 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 128KB flash, 16KB RAM, LCD controller (320 segments), AES-128 encryption, and RTC with tamper detection - enabling ANSI C12.20/IEC 62053-compliant energy measurement in utility metering applications.

For engineers reviewing the MSP430F6765AIPZR datasheet, MSP430F6765AIPZR pinout, MSP430F6765AIPZR application, or MSP430F6765AIPZR equivalent, key selection criteria include its 6-channel SD24_B ADC accuracy (<0.1% over 2000:1 dynamic range), LQFP-128 package with 90 GPIOs, ultra-low-power LPM3.5 mode (0.34 µA), and support for current transformers, Rogowski coils, and shunt sensors in 3-phase 4-wire star configurations.

Technical Context

The MSP430F6765AIPZR implements a dedicated metrology subsystem with six independent 24-bit sigma-delta modulators feeding digital filters and energy calculation engines. Its CPU executes TI's Energy Measurement Software Library to compute active/reactive power, RMS voltage/current, phase angle, and cumulative kWh/kVARh across three phases plus neutral - all calibrated within a single 40–70 Hz line frequency range.

Digital integration includes four eUSCI_A modules (UART/IrDA/SPI), two eUSCI_B modules (I²C/SPI), three-channel DMA, 16-bit CRC, and hardware AES-128 for secure firmware updates and data encryption. Power management supports automatic supply switching between AC mains and backup battery, with LCD operation at 3 µA in LPM3 during mains failure.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, RoHS-compliant, with exposed thermal pad (not electrically connected). Pinout validated per TI SLAS982A Rev. September 2018, Figure 4-1 and Table 4-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6765AIPZR, the MSP430F6766AIPZR offers double flash capacity for complex communication stacks, while the MSP430F6765IPZ trades I/O count and LCD drive capability for compactness - both retain identical metrology accuracy, low-power performance, and ANSI/IEC compliance.

Availability

MSP430F6765AIPZR is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade submetering, and AMI endpoint deployments requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified designs.

Supply support for MSP430F6765AIPZR 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 MSP430F6765AIPZR belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for high-accuracy, ultra-low-power energy measurement in smart grid infrastructure and utility metering systems.

FAQ

What metrology standards does the MSP430F6765AIPZR comply with?

The MSP430F6765AIPZR meets or exceeds ANSI C12.20 Class 0.2 and IEC 62053-22/23 accuracy requirements for active and reactive energy measurement. Its six 24-bit sigma-delta ADCs deliver <0.1% error over 2000:1 dynamic range, and on-chip digital phase correction ensures <0.1° phase-angle accuracy - critical for compliant 3-phase 4-wire metering. Calibration is valid across 40–70 Hz line frequencies using a single point.

How many analog input channels does the MSP430F6765AIPZR support for energy measurement?

The MSP430F6765AIPZR supports six independent 24-bit sigma-delta ADC channels (SD24_B) configured as three differential voltage inputs and three differential current inputs - sufficient for full 3-phase + neutral metering with current transformers or shunts. Each channel includes programmable gain and digital filtering; VREF pin accepts an external 2.5 V reference for ratio-metric precision.

What is the lowest power consumption mode available on the MSP430F6765AIPZR?

The MSP430F6765AIPZR achieves 0.34 µA in RTC mode (LPM3.5) at 3 V with real-time clock running from VBAT, and 0.18 µA in shutdown mode (LPM4.5). In LPM3 (standby), it draws 2.1 µA while retaining full RAM and register state - enabling fast wake-up (<5 µs) for pulse counting or event-triggered measurements. LCD operation consumes only 3 µA during AC mains failure.

Does the MSP430F6765AIPZR include hardware security features?

Yes, the MSP430F6765AIPZR integrates a hardware AES-128 encryption module for secure firmware updates and encrypted data transmission, plus a password-protected RTC with tamper detection that logs physical intrusion attempts to secure memory. Tamper events trigger immediate RTC freeze and flag storage, supporting utility anti-tampering compliance (e.g., ANSI C12.10).

What package and pin count does the MSP430F6765AIPZR use?

The MSP430F6765AIPZR uses a 128-pin LQFP (PEU) package measuring 20 mm × 14 mm with 90 general-purpose I/O pins. This package supports full metrology functionality including six SD24_B analog inputs, eight LCD commons (COM0–COM7), four eUSCI_A and two eUSCI_B interfaces, and dedicated pulse output pins for active/reactive energy calibration - as confirmed in TI SLAS982A Rev. September 2018, Figure 4-1.