Texas Instruments MSP430F6766IPZR

Overview

MSP430F6766IPZR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring six 24-bit sigma-delta ADCs, 256KB flash, 16KB RAM, and <0.1% energy measurement accuracy over 2000:1 dynamic range at 40–70 Hz line frequency. It integrates LCD controller (320 segments), AES-128 encryption, RTC with temperature compensation, and supports current transformers, Rogowski coils, or shunt sensors.

For engineers reviewing the MSP430F6766IPZR datasheet, MSP430F6766IPZR pinout, MSP430F6766IPZR application, or MSP430F6766IPZR equivalent, key selection criteria include its 100-pin LQFP (PZ) package, 62 I/O pins, ultra-low-power LPM3.5 mode (0.34 µA), ANSI C12.20/IEC 62053 compliance, and dedicated pulse outputs for active/reactive energy calibration.

Technical Context

This device belongs to the MSP430F676x family of metering SoCs, built around the ultra-low-power 25-MHz MSP430 CPU with 32-bit hardware multiplier. Its analog front end includes six independent SD24_B sigma-delta modulators with differential inputs, programmable gain, and internal reference support - enabling simultaneous voltage/current sampling across three phases plus neutral.

The architecture supports four-quadrant energy calculation per phase or cumulative, digital phase correction for CTs, and temperature-compensated measurements using on-chip sensors. Communication is handled via six configurable eUSCI ports (up to four UARTs, six SPIs, two I²Cs), while the LCD_C module drives up to 320 segments with contrast control and operates down to 3 µA in LPM3 during AC failure.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6766IPZR, the MSP430F6768IPZ offers double flash capacity for advanced firmware features, while MSP430F6766IPZR is functionally identical but supplied in tape-and-reel format - making it optimal for automated manufacturing without electrical trade-offs.

Availability

MSP430F6766IPZR is available at Aetrix Electronics and suitable for smart electricity meters, revenue-grade energy monitors, anti-tamper utility meters, and grid-scale power quality analyzers requiring stable component supply, long lifecycle support, and TI-qualified metrology performance.

Supply support for MSP430F6766IPZR 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 expertise in precision metrology and low-power microcontrollers.

The MSP430F676x product line was engineered specifically for revenue-grade polyphase energy metering - integrating metrology-grade ADCs, secure firmware execution, and ultra-low-power operation into a single SoC to replace multi-chip meter designs.

FAQ

What is the primary metrology accuracy specification of the MSP430F6766IPZR?

The MSP430F6766IPZR achieves <0.1% energy measurement accuracy over a 2000:1 dynamic range at line frequencies from 40 Hz to 70 Hz. This performance meets ANSI C12.20 Class 0.1 and IEC 62053-22 Class 0.2 standards for revenue-grade metering. The accuracy is enabled by six 24-bit sigma-delta ADCs with digital phase correction, temperature compensation, and internal reference stability - all validated under specified operating conditions in the SLAS768E datasheet.

Does the MSP430F6766IPZR support real-time clock functionality with battery backup?

Yes, the MSP430F6766IPZR includes a password-protected real-time clock (RTC) with crystal offset calibration and temperature compensation. It operates in LPM3.5 mode drawing only 0.34 µA at 3 V, powered by AUXVCC3 during AC mains failure. The RTC retains time/date across power cycles and supports tamper detection via dedicated pins - ensuring continuous, secure timekeeping essential for time-of-use billing and event logging in the MSP430F6766IPZR.

How many sigma-delta ADC channels does the MSP430F6766IPZR integrate, and what are their key configurations?

The MSP430F6766IPZR integrates six independent 24-bit SD24_B sigma-delta ADC modules, each with differential inputs, programmable gain (1× to 32×), and internal reference support. These are mapped to SD0P0/SD0N0 through SD6P0/SD6N0 pins and are optimized for simultaneous sampling of phase A/B/C voltages and currents, plus neutral current - enabling full 3-phase 4-wire metering without external ADCs in the MSP430F6766IPZR design.

What communication interfaces are available on the MSP430F6766IPZR, and how are they implemented?

The MSP430F6766IPZR provides six enhanced universal serial communication interfaces (eUSCI), configurable as up to four UARTs, six SPIs, or two I²C ports. These are implemented via multiplexed pins on Ports P1–P4 and support simultaneous operation - for example, one UART for AMI communication, one SPI for secure flash update, and one I²C for external sensor interface. All eUSCI modules operate independently with DMA support and programmable baud rates, as defined in the MSP430F6766IPZR technical documentation.

What is the package type and pin count of the MSP430F6766IPZR, and how many GPIOs does it provide?

The MSP430F6766IPZR uses a 100-pin LQFP (PZ) package with a 14 mm × 14 mm body size and industrial temperature rating (–40°C to +85°C). It provides 62 general-purpose I/O pins, each supporting multiple secondary functions including UART, SPI, I²C, timer capture/compare, and LCD segment driving. Pin assignments are fully documented in Section 4.1 of the SLAS768E datasheet, with default mappings and remapping capability via register configuration in the MSP430F6766IPZR.