Texas Instruments MSP430F6776AIPZR

Overview

MSP430F6776AIPZR from Texas Instruments is a polyphase metering SoC designed for high-accuracy energy measurement in 3-phase utility meters. It integrates seven 24-bit sigma-delta ADCs (0.1% accuracy over 2000:1 dynamic range), a 25-MHz CPU with 32-bit multiplier, 256KB flash/16KB RAM, LCD controller (320 segments), and hardware AES-128 encryption - all in a 128-pin LQFP package.

For engineers reviewing the MSP430F6776AIPZR datasheet, MSP430F6776AIPZR pinout, MSP430F6776AIPZR application, or MSP430F6776AIPZR equivalent, key selection criteria include ANSI C12.20/IEC 62053 compliance, 4-quadrant per-phase power calculation, RTC tamper detection, ultra-low-power LPM3.5 mode (0.34 µA), and support for CT/Rogowski/shunt sensors in 3-phase 4-wire star configurations.

Technical Context

The MSP430F6776AIPZR implements a dedicated metrology subsystem with independent SD24_B modulators per phase, enabling simultaneous voltage/current sampling with digital phase correction and temperature-compensated energy integration. Its dual-reference architecture supports both internal (1.5 V) and external references for ADC10_A and SD24_B converters.

It features six eUSCI modules (four UART/IrDA/SPI-capable, two SPI/I²C-capable), three-channel DMA for zero-CPU-overhead data transfer from ADCs to memory, and a real-time clock with crystal offset calibration and tamper-detect pins - all operating across 1.8–3.6 V supply with automatic power-source switching between AC mains and backup battery.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, 0.5 mm pitch. Pin count includes 90 general-purpose I/Os with configurable secondary functions including ADC inputs, timer capture/compare, LCD segment/backplane, and eUSCI signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6776AIPZR, the IPZ variant trades I/O and metrology channel count for smaller footprint, while the F6777AIPZR adds RAM headroom for feature-rich firmware - neither is pin-compatible, but all share identical peripheral register maps and metrology IP blocks.

Availability

MSP430F6776AIPZR is available at Aetrix Electronics and suitable for 3-phase electronic watt-hour meters, smart grid distribution monitors, and industrial energy management systems requiring stable component supply, long-term lifecycle support, and TI-qualified metrology performance.

Supply support for MSP430F6776AIPZR 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 over 50 years of innovation in precision measurement and low-power design.

The MSP430F6776AIPZR belongs to the MSP430™ Metrology and Monitoring MCU portfolio, engineered specifically for revenue-grade energy measurement in utility smart meters and industrial power analyzers - prioritizing metrology accuracy, security, and ultra-low-power operation.

FAQ

What is the maximum dynamic range supported by the MSP430F6776AIPZR's sigma-delta ADCs?

The MSP430F6776AIPZR integrates seven 24-bit SD24_B sigma-delta ADCs achieving better than 0.1% accuracy over a 2000:1 dynamic range. This specification is validated per ANSI C12.20 and IEC 62053 standards for Class 0.2 metering, enabling precise measurement from light-load standby conditions to full-rated current without range switching. The MSP430F6776AIPZR uses digital gain calibration and temperature compensation to maintain this performance across -40°C to +85°C.

Does the MSP430F6776AIPZR support hardware-accelerated cryptographic operations?

Yes, the MSP430F6776AIPZR includes a dedicated hardware AES-128 encryption module compliant with FIPS PUB 197. It supports ECB, CBC, and CTR modes with zero CPU intervention, enabling secure firmware updates, encrypted DLMS/COSEM communications, and tamper-resistant data logging. The MSP430F6776AIPZR AES engine operates independently of the CPU and integrates with DMA for bulk data encryption - critical for meeting IEC 62056-21 and DLMS UA security profiles.

How does the MSP430F6776AIPZR handle power supply failures during meter operation?

The MSP430F6776AIPZR implements an intelligent power management system with automatic switchover between AC mains, supercapacitor, and coin-cell battery sources. In LPM3.5 mode, it consumes only 0.34 µA while maintaining RTC operation and SRAM retention - enabling >10 years of backup runtime on a CR2032 cell. The MSP430F6776AIPZR monitors VCC and triggers brown-out reset or low-power transition before data corruption occurs, preserving metering integrity during grid instability.

Can the MSP430F6776AIPZR drive a 320-segment LCD without external components?

Yes, the MSP430F6776AIPZR integrates a full-featured LCD_C controller supporting up to 320 segments (8 backplanes × 40 commons) with programmable bias, contrast, and frame frequency. It includes internal charge pumps and capacitor-less operation when using the LCDCAP pin with external 100 nF capacitor - eliminating external resistors, capacitors, or boost converters. The MSP430F6776AIPZR LCD_C module supports static, 2-, 3-, and 4-mux configurations and operates down to 1.8 V supply.

What communication interfaces are available on the MSP430F6776AIPZR for smart meter connectivity?

The MSP430F6776AIPZR provides six enhanced Universal Serial Communication Interfaces: four eUSCI_A modules supporting UART, IrDA, and SPI (for optical ports, PLC modems, or debug); and two eUSCI_B modules supporting SPI and I²C (for EEPROM, secure elements, or isolated RS-485 transceivers). All eUSCI peripherals operate independently, enabling concurrent HPLC backhaul, local optical readout, and secure element communication - essential for multi-interface smart meter architectures.