Texas Instruments MSP430F6779IPEUR

Overview

MSP430F6779IPEUR from Texas Instruments is a polyphase metering SoC designed for revenue-grade 3-phase electronic watt-hour meters. It integrates seven 24-bit sigma-delta ADCs, 512KB flash, 32KB RAM, LCD controller (320 segments), AES-128 encryption, and real-time clock with temperature compensation - delivering <0.1% energy measurement accuracy over 2000:1 dynamic range per phase in utility metering applications.

For engineers reviewing the MSP430F6779IPEUR datasheet, MSP430F6779IPEUR pinout, MSP430F6779IPEUR application, or MSP430F6779IPEUR equivalent, this page provides verified technical context, key specifications, package mapping, functional alternatives, and supply support tailored to ANSI C12.20 / IEC 62053-compliant meter design.

Technical Context

The MSP430F6779IPEUR implements a dedicated metering architecture with seven independent SD24_B sigma-delta modulators supporting differential inputs and programmable gain for simultaneous voltage/current sampling across three phases plus neutral. Its 25-MHz CPU with 32-bit hardware multiplier executes TI's certified energy measurement library for active/reactive power, RMS, harmonics, and four-quadrant calculations.

Power management includes dual-domain supply (AVCC/DVCC/VCORE), auxiliary subsystems (AUXVCC1–3) for backup operation, and ultra-low-power modes: LPM3 (2.1 µA), LPM3.5 (0.34 µA), and LPM4.5 (0.18 µA), enabling >10-year battery-backed RTC and LCD retention during AC mains failure.

Key Specifications

Pinout & Package

128-pin LQFP (PEU) package, 20 mm × 14 mm body size, 0.5 mm pitch. Exposed thermal pad not present. Compatible with standard reflow profiles (JEDEC J-STD-020).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6778IPEUR and MSP430F6769IPEUR, the MSP430F6779IPEUR uniquely delivers full 3-phase+neutral metrology capability with maximum on-chip RAM for complex firmware, making it the highest-specification option in the F677x family for Class 0.1 revenue meters.

Availability

MSP430F6779IPEUR is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and AMI endpoint node development requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for utility-certified designs.

Supply support for MSP430F6779IPEUR 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, embedded processing, and connectivity technologies with leadership in low-power microcontrollers and precision metrology solutions.

The MSP430F6779IPEUR belongs to TI's polyphase metering SoC product line, engineered specifically for revenue-grade 3-phase watt-hour meters that must meet ANSI C12.20 and IEC 62053 standards with minimal external components and ultra-low standby power.

FAQ

What is the primary metrology accuracy specification of the MSP430F6779IPEUR?

The MSP430F6779IPEUR achieves <0.1% energy measurement accuracy over a 2000:1 dynamic range per phase under specified operating conditions. This performance meets ANSI C12.20 Class 0.1 and IEC 62053-22 Class 0.5S requirements when used with calibrated current transformers or shunt resistors and proper PCB layout. The MSP430F6779IPEUR implements digital phase correction and temperature compensation algorithms within its certified energy measurement library to sustain this accuracy across –40°C to +85°C and 40–70 Hz line frequencies.

Does the MSP430F6779IPEUR support hardware-accelerated encryption?

Yes, the MSP430F6779IPEUR integrates a dedicated hardware AES-128 encryption module with DMA support. This enables secure firmware updates, encrypted consumption data transmission, and tamper-resistant storage of cryptographic keys without CPU overhead. The MSP430F6779IPEUR uses this module to implement DLMS/COSEM security profiles and comply with utility-level cybersecurity mandates such as NIST IR 7628 and EN 14908.

What low-power modes are available on the MSP430F6779IPEUR and their typical current draw?

The MSP430F6779IPEUR offers multiple ultra-low-power modes: Standby (LPM3) draws 2.1 µA at 3 V with RTC active; RTC-only mode (LPM3.5) consumes 0.34 µA; and shutdown mode (LPM4.5) draws just 0.18 µA. These modes enable >10-year battery life for backup operation. The MSP430F6779IPEUR retains full RTC functionality and SRAM contents in LPM3.5, and supports wake-up in <5 µs from any interrupt source - critical for time-synchronized metering events.

How many sigma-delta ADC channels does the MSP430F6779IPEUR include, and what is their resolution?

The MSP430F6779IPEUR includes seven independent 24-bit sigma-delta ADCs (SD24_B modules), each with differential inputs, programmable gain, and built-in offset calibration. These ADCs support simultaneous sampling across all three phases plus neutral, enabling true 3-phase 4-wire metering. The MSP430F6779IPEUR uses these converters for voltage, current, and reference measurements - eliminating need for external metrology ADCs and reducing system noise sensitivity through on-chip filtering and decimation.

Is the MSP430F6779IPEUR pin-compatible with other devices in the F677x family?

Yes, the MSP430F6779IPEUR in the 128-pin LQFP (PEU) package is pin-compatible with all other F677x, F676x, and F674x variants offered in the same PEU package, including MSP430F6778IPEUR and MSP430F6769IPEUR. Pin mappings for power, clocks, reset, JTAG, and primary peripherals are identical. Differences exist only in secondary functions of certain pins (e.g., SD4DIO vs S39) and internal resource allocation - verified in Table 4-1 of the SLAS768E datasheet. This allows hardware reuse across meter tiers.