Texas Instruments MSP430F6779AIPZ

Overview

MSP430F6779AIPZ from Texas Instruments is a polyphase metering SoC designed for high-accuracy energy measurement in 3-phase 4-wire utility meters. It integrates seven independent 24-bit sigma-delta ADCs (±0.1% accuracy over 2000:1 dynamic range), a 25-MHz CPU with 32-bit multiplier, 512KB flash/32KB RAM, LCD controller (320 segments), and hardware AES-128 encryption - all in a 100-pin LQFP package.

For engineers reviewing the MSP430F6779AIPZ datasheet, MSP430F6779AIPZ pinout, MSP430F6779AIPZ application, or MSP430F6779AIPZ equivalent, key selection criteria include ANSI C12.20/IEC 62053 compliance, 4-quadrant per-phase power calculation, RTC with tamper detection, ultra-low-power LPM3.5 mode (0.34 µA), and support for CT/Rogowski/shunt current sensing topologies.

Technical Context

The MSP430F6779AIPZ implements a dedicated metrology subsystem with seven SD24_B sigma-delta modulators feeding independent digital filters, enabling simultaneous voltage/current sampling across three phases plus neutral. Its metrology engine performs real-time active/reactive/apparent energy, phase angle, and power quality calculations without CPU intervention.

Digital architecture includes three-channel DMA for zero-CPU-overhead data movement between ADCs and memory, four 16-bit timers (nine capture/compare registers), six eUSCI modules (four UART/IrDA/SPI + two SPI/I²C), and integrated RTC with crystal offset calibration and temperature compensation - all operating under multiple low-power modes down to 0.18 µA in LPM4.5.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, 0.5 mm pitch, 62 GPIOs including dedicated metrology analog inputs, pulse outputs, and LCD segment/common drivers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6778AIPZ and MSP430F6769AIPZ, the MSP430F6779AIPZ provides the highest metrology channel count (7 SD24_B), largest RAM (32KB) for extended waveform storage, and full support for 3-phase 4-wire neutral current measurement - making it the only option in the family qualified for full ANSI/IEC Class 0.2 revenue metering with neutral monitoring.

Availability

MSP430F6779AIPZ is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade utility metering, and industrial energy monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing for global deployments.

Supply support for MSP430F6779AIPZ 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The MSP430F6779AIPZ belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for high-accuracy, low-power energy measurement in smart grid infrastructure and utility-grade metering applications.

FAQ

What metrology standards does the MSP430F6779AIPZ comply with?

The MSP430F6779AIPZ meets or exceeds ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.2 accuracy requirements for active and reactive energy measurement. Its <0.1% error over 2000:1 dynamic range, 4-quadrant operation, and digital phase correction ensure compliance in 3-phase 4-wire configurations. The MSP430F6779AIPZ achieves this with on-chip calibration routines and temperature-compensated metrology engines - no external precision components required.

How many independent analog inputs does the MSP430F6779AIPZ support for polyphase measurement?

The MSP430F6779AIPZ supports seven independent differential analog input pairs (SD0P0/SD0N0 through SD6P0/SD6N0), each connected to a dedicated 24-bit sigma-delta modulator. This enables simultaneous sampling of three phase voltages, three phase currents, and neutral current - essential for full 3-phase 4-wire metering. The MSP430F6779AIPZ uses these inputs to compute per-phase active/reactive power, cumulative totals, and harmonic content without CPU intervention.

Does the MSP430F6779AIPZ include hardware encryption capabilities?

Yes, the MSP430F6779AIPZ integrates a dedicated hardware AES-128 encryption module compliant with FIPS PUB 197. It accelerates encryption/decryption of firmware images, tariff data, and communication payloads - reducing CPU load and ensuring deterministic timing for secure boot and OTA updates. The MSP430F6779AIPZ also features password-protected RTC registers and tamper detection circuitry to prevent unauthorized access to time-critical billing data.

What is the lowest power consumption mode supported by the MSP430F6779AIPZ?

The MSP430F6779AIPZ supports LPM4.5 (shutdown mode) with 0.18 µA typical current draw at 3 V, retaining only SRAM state and wake-up capability via selected interrupts. In LPM3.5 (RTC mode), it consumes 0.34 µA while maintaining real-time clock operation, calendar functions, and RAM retention - ideal for battery-backed metering during AC mains failure. The MSP430F6779AIPZ achieves this via segmented power gating and ultra-low-leakage process technology.

Can the MSP430F6779AIPZ drive an LCD display directly?

Yes, the MSP430F6779AIPZ includes an integrated LCD_C peripheral supporting up to 320 segments with static, 2-, 3-, or 4-mux operation. It provides programmable contrast control, charge pump regulation, and automatic blink control - eliminating external LCD bias circuitry. The MSP430F6779AIPZ drives COM0–COM7 and SEG0–SEG319 directly from dedicated pins, enabling full-segment alphanumeric displays for utility meter front panels without additional driver ICs.