Texas Instruments MSP430F6778IPZR

Overview

MSP430F6778IPZR 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, a 25-MHz CPU with 32-bit multiplier, 512KB flash/16KB RAM, LCD controller (320 segments), AES-128 encryption, and dedicated pulse outputs for active/reactive energy calibration - enabling ANSI C12.20 and IEC 62053 compliance in utility metering applications.

For engineers reviewing the MSP430F6778IPZR datasheet, MSP430F6778IPZR pinout, MSP430F6778IPZR application, or MSP430F6778IPZR equivalent, key selection criteria include its 0.1% accuracy over 2000:1 dynamic range, ultra-low-power LPM3.5 mode (0.34 µA), 100-pin LQFP package with 62 GPIOs, and integrated metrology AFE supporting CT, Rogowski, and shunt sensors.

Technical Context

The MSP430F6778IPZR implements a dedicated metrology subsystem with seven independent SD24_B sigma-delta modulators - six for phase/neutral current sensing and one for voltage reference - each with programmable gain and differential inputs. Its real-time energy calculation engine executes TI's certified energy measurement software library directly on-chip, eliminating external DSP requirements.

Power management includes dual-domain supply architecture (AVCC/DVCC/VCORE), automatic mains-backup switching, and hardware-accelerated low-power modes: LPM3 (2.1 µA), LPM3.5 (0.34 µA), and LPM4.5 (0.18 µA). Communication is supported via six eUSCI modules configurable as UART, SPI, or I²C - four eUSCI_A and two eUSCI_B - with full isolation-ready signal mapping.

Key Specifications

Pinout & Package

100-pin LQFP (PZ) package, 14 mm × 14 mm body size, 0.5 mm pitch, exposed thermal pad not electrically connected. Pin functions include 62 general-purpose I/Os, 8 LCD COM drivers, 7 SD24_B analog inputs (SDxP/N), dedicated pulse outputs (S0–S9), RTC crystal interface (XIN/XOUT), and metrology auxiliary supplies (AUXVCC1–3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6779IPZ, the MSP430F6778IPZR trades 16 KB RAM for lower unit cost while retaining identical metrology accuracy and pulse-generation capability; versus MSP430F6768IPZ, it adds the seventh SD24_B channel for precise neutral-energy measurement required in revenue-grade 4-wire systems.

Availability

MSP430F6778IPZR is available at Aetrix Electronics and suitable for smart grid revenue metering, industrial energy monitoring, and AMI endpoint node designs requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified production.

Supply support for MSP430F6778IPZR 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 digital signal processing technologies with leadership in ultra-low-power microcontrollers.

The MSP430F6778IPZR belongs to TI's polyphase metering SoC product line, engineered specifically for revenue-grade electricity meters that demand metrology-grade accuracy, integrated security, and ultra-low standby power in harsh environmental conditions.

FAQ

What metrology standards does the MSP430F6778IPZR comply with?

The MSP430F6778IPZR meets or exceeds ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S accuracy requirements across 2000:1 dynamic range. Its sigma-delta ADC architecture, digital phase correction, and temperature-compensated energy calculations are validated per these standards in TI's certified energy measurement software library - which runs natively on the MSP430F6778IPZR without external calibration hardware.

How many analog input channels does the MSP430F6778IPZR support for current sensing?

The MSP430F6778IPZR supports six dedicated differential analog input channels (SD0–SD5) for phase A/B/C and neutral current sensing using CTs, Rogowski coils, or shunts - plus a seventh channel (SD6) for precision voltage reference. All seven SD24_B sigma-delta modulators feature programmable gain, 24-bit resolution, and simultaneous sampling capability essential for vector-based power calculations.

What is the lowest power consumption mode of the MSP430F6778IPZR during AC mains failure?

In RTC mode (LPM3.5), the MSP430F6778IPZR consumes just 0.34 µA at 3 V - sustaining real-time clock operation, tamper detection, and backup RAM retention using only AUXVCC3 supply. This ultra-low quiescent current enables >10-year battery life in sealed meters and eliminates need for oversized supercapacitors during extended outages.

Does the MSP430F6778IPZR include hardware encryption capabilities?

Yes, the MSP430F6778IPZR integrates a dedicated hardware AES-128 encryption module that performs full-block encryption/decryption in under 10 µs. This accelerator supports secure boot, firmware authentication, and DLMS/COSEM payload encryption - meeting ANSI C12.22 and IEC 62056-21 cryptographic requirements without burdening the CPU or requiring external security ICs.

What package type and pin count does the MSP430F6778IPZR use?

The MSP430F6778IPZR uses a 100-pin LQFP (PZ) package measuring 14 mm × 14 mm with 0.5 mm pitch. It provides 62 general-purpose I/O pins, including 8 LCD COM lines, 7 SD24_B analog inputs, 10 dedicated pulse output pins (S0–S9), and metrology-specific supplies (AUXVCC1–3), making it ideal for compact, high-integration meter PCB layouts.