Texas Instruments MSP430F6779IPEU

Overview

MSP430F6779IPEU from Texas Instruments is a polyphase metering SoC designed for revenue-grade 3-phase electronic watt-hour meters, featuring seven 24-bit sigma-delta ADCs, 512KB flash, 32KB RAM, LCD controller (320 segments), and hardware AES-128 encryption - all in a 128-pin LQFP package operating from 1.8 V to 3.6 V.

For engineers reviewing the MSP430F6779IPEU datasheet, MSP430F6779IPEU pinout, MSP430F6779IPEU application, or MSP430F6779IPEU equivalent, this device delivers ANSI C12.20/IEC 62053-compliant energy measurement with <0.1% accuracy over 2000:1 dynamic range, ultra-low-power RTC mode (0.34 µA), and integrated metrology peripherals including pulse output pins and digital phase correction.

Technical Context

The MSP430F6779IPEU integrates TI's high-precision 24-bit SD24_B sigma-delta modulators with differential inputs and programmable gain, supporting simultaneous sampling across up to three phases plus neutral. Its dedicated metrology subsystem performs real-time four-quadrant power calculation, exact phase angle measurement, and temperature-compensated energy integration without host CPU intervention.

It combines a 25-MHz MSP430 CPU with 32-bit hardware multiplier, six eUSCI modules (configurable as UART/SPI/I²C), four 16-bit timers, and an ultra-low-power backup subsystem (AUXVCC3) enabling 3 µA LCD operation during AC mains failure - all coordinated by TI's certified energy measurement software library.

Key Specifications

Pinout & Package

128-pin LQFP (PEU) package, 20 mm × 14 mm body size, industrial temperature range (–40°C to +85°C). Pin functions validated per TI SLAS768E datasheet Section 4.1–4.2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6778IPEU and MSP430F6769IPEU, the MSP430F6779IPEU uniquely provides both maximum RAM (32KB) and full seven-channel SD24_B capability - making it the only variant qualified for full 3-phase 4-wire Class 0.1 revenue meters with embedded AMI firmware and secure logging.

Availability

MSP430F6779IPEU is available at Aetrix Electronics and suitable for smart grid revenue metering, AMI-compatible energy monitoring, and anti-tamper utility metering requiring stable component supply and long-term lifecycle assurance.

Supply support for MSP430F6779IPEU 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 decades of utility metering design expertise.

The MSP430F6779IPEU belongs to TI's polyphase metering SoC product line, engineered specifically for revenue-grade electricity meters that demand metrology accuracy, ultra-low-power backup operation, and integrated security - not general-purpose microcontrollers.

FAQ

What is the primary metrology accuracy specification of the MSP430F6779IPEU?

The MSP430F6779IPEU achieves <0.1% energy measurement error over a 2000:1 dynamic range, fully compliant with ANSI C12.20 Class 0.1 and IEC 62053-22 standards. This accuracy is enabled by its seven 24-bit sigma-delta ADCs, digital phase correction, and temperature-compensated computation engine - all verified under standardized test conditions in TI's SLAS768E datasheet.

Does the MSP430F6779IPEU support hardware-based encryption?

Yes, the MSP430F6779IPEU includes a dedicated hardware AES-128 encryption module that accelerates cryptographic operations for secure firmware updates and encrypted meter data transmission. This module operates independently of the CPU, preserving real-time metrology performance while meeting IEC 62053-31 security requirements - a core feature confirmed in the device's functional block diagram and peripheral description.

What is the lowest power consumption mode supported by the MSP430F6779IPEU during AC mains failure?

The MSP430F6779IPEU supports RTC Mode (LPM3.5) at 0.34 µA at 3 V, enabling continuous timekeeping and critical register retention during AC mains failure. Additionally, its LCD driver operates at just 3 µA in LPM3 - verified in Section 5.6 of the SLAS768E datasheet - allowing full display functionality on backup power without compromising battery life.

How many independent sigma-delta ADC channels does the MSP430F6779IPEU provide?

The MSP430F6779IPEU integrates seven independent 24-bit SD24_B sigma-delta modulators with differential inputs and variable gain. As confirmed in Table 3-1 of the SLAS768E datasheet, this is the highest SD24_B count in the F677x family and enables simultaneous acquisition across three-phase voltage/current, neutral current, and auxiliary sensors - a defining capability of the MSP430F6779IPEU.

Is the MSP430F6779IPEU pin-compatible with other devices in the F677x family?

Yes, the MSP430F6779IPEU shares identical 128-pin LQFP (PEU) packaging and pinout with all F677x, F676x, and F674x variants in the same package option, including MSP430F6778IPEU and MSP430F6769IPEU. Pin compatibility is explicitly documented in Table 4-1 and Figure 4-1 of SLAS768E, enabling hardware reuse across meter performance tiers.