Texas Instruments MSP430F6769IPEU

Overview

MSP430F6769IPEU 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, 32KB RAM, LCD controller (320 segments), and hardware AES-128 encryption. It delivers <0.1% energy measurement accuracy over 2000:1 dynamic range and meets ANSI C12.20 and IEC 62053 standards in utility revenue metering applications.

For engineers reviewing the MSP430F6769IPEU datasheet, MSP430F6769IPEU pinout, MSP430F6769IPEU application, or MSP430F6769IPEU equivalent, key selection criteria include phase current accuracy, integrated SD24_B ADC count, RTC security features, low-power standby (2.1 µA in LPM3), and 128-pin LQFP package compatibility with metering reference designs.

Technical Context

The MSP430F6769IPEU implements a dedicated metering subsystem with six independent 24-bit sigma-delta modulators supporting differential inputs and programmable gain, enabling simultaneous voltage/current sampling across three phases plus neutral. Its 25-MHz CPU with 32-bit hardware multiplier executes TI's energy measurement software library for real-time active/reactive power, energy accumulation, and tariff management.

It integrates dual power domains (AVCC/DVCC), auxiliary supplies (AUXVCC1–3) for backup subsystem operation, and tamper-detect circuitry with password-protected RTC and crystal offset calibration. The device supports four-quadrant energy measurement and digital phase correction for current transformers within 40–70 Hz line frequency range using single-point calibration.

Key Specifications

Pinout & Package

128-pin LQFP (PEU) package, 20 mm × 14 mm body size, with exposed thermal pad (not electrically connected). Pin functions include dedicated SD24_B analog inputs (SD0P0–SD3N0, SD4P0–SD5N0), 8 LCD COM outputs (COM0–COM7), auxiliary supply rails (AUXVCC1–3), RTC calibration capacitors (RTCCAP0/1), and dual-domain power pins (AVCC/AVSS, DVCC/DVSS, VASYS/VDYS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6768IPEU, the MSP430F6769IPEU provides double the RAM for complex tariff logic and secure boot staging; compared with MSP430F6779IPEU, it omits one SD24_B channel - reducing analog front-end component count while retaining full 3-phase+neutral metrology capability.

Availability

MSP430F6769IPEU is available at Aetrix Electronics and suitable for smart electricity meters, revenue metering systems, and energy monitoring gateways requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-grade deployments.

Supply support for MSP430F6769IPEU 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 company specializing in analog and embedded processing technologies, with leadership in ultra-low-power microcontrollers and precision metrology solutions.

The MSP430F676x family is designed specifically for polyphase energy metering applications, integrating metrology-grade ADCs, secure real-time clock, LCD drivers, and communication peripherals into a single SoC to minimize external components and accelerate ANSI/IEC-certified meter development.

FAQ

What is the maximum number of simultaneous analog inputs supported by the MSP430F6769IPEU?

The MSP430F6769IPEU integrates six independent 24-bit sigma-delta ADCs (SD24_B), each with differential inputs and programmable gain. These support up to six simultaneous analog measurement channels - sufficient for three-phase voltage/current pairs plus neutral current sensing. The device also includes a separate 10-bit system ADC with six external channels for auxiliary sensors.

Does the MSP430F6769IPEU support hardware-accelerated encryption?

Yes, the MSP430F6769IPEU includes a dedicated hardware AES-128 encryption module. This enables secure firmware updates, encrypted data storage in backup RAM, and protected communication with AMI modules - all without consuming CPU cycles. The module is accessible via DMA and supports ECB/CBC modes required for utility cybersecurity standards.

What low-power modes are available on the MSP430F6769IPEU, and what is the lowest current draw?

The MSP430F6769IPEU offers multiple low-power modes: LPM3 (standby) draws 2.1 µA at 3 V, LPM3.5 (RTC active) draws 0.34 µA, and LPM4.5 (full shutdown) draws 0.18 µA. In LPM3, the LCD continues operating at 3 µA - enabling display visibility during AC mains failure without external boost converters.

How does the MSP430F6769IPEU meet ANSI C12.20 and IEC 62053 standards?

The MSP430F6769IPEU achieves <0.1% energy measurement accuracy over 2000:1 dynamic range using its six 24-bit sigma-delta ADCs, digital phase correction for CTs, temperature compensation, and four-quadrant calculation engine. TI's certified energy measurement software library - pre-integrated and validated - ensures compliance with ANSI C12.20 Class 0.2 and IEC 62053-22/61 accuracy requirements.

Is the MSP430F6769IPEU pin-compatible with other devices in the MSP430F676x family?

Yes, all MSP430F676x devices in the 128-pin LQFP (PEU) package - including MSP430F6765IPEU through MSP430F6769IPEU - share identical pinouts and mechanical footprint. This allows hardware reuse across variants differing only in flash/RAM size and SD24_B channel count, simplifying design scalability and inventory management.