Texas Instruments MSP430F6775IPZ

Overview

MSP430F6775IPZ from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring seven 24-bit sigma-delta ADCs, 128KB flash, 16KB RAM, and <0.1% energy measurement accuracy over 2000:1 dynamic range. It supports ANSI C12.20 and IEC 62053 standards, operates from 1.8 V to 3.6 V, and delivers ultra-low-power operation (2.1 µA in LPM3 standby).

For engineers reviewing the MSP430F6775IPZ datasheet, MSP430F6775IPZ pinout, MSP430F6775IPZ application, or MSP430F6775IPZ equivalent, key selection criteria include its 100-pin LQFP package with 62 GPIOs, integrated LCD controller (320-segment), hardware AES-128 encryption, RTC with temperature compensation, and dedicated pulse outputs for active/reactive energy calibration.

Technical Context

The MSP430F6775IPZ implements a 25-MHz MSP430 CPU with 32-bit hardware multiplier for real-time energy calculations, executing TI's certified energy measurement software library. Its analog front end includes seven independent SD24_B sigma-delta modulators with differential inputs, programmable gain, and AC performance validated across 40–70 Hz line frequencies using single-point calibration.

Digital subsystems include six eUSCI modules configurable as UART/SPI/I²C, four 16-bit timers with nine capture/compare registers, and a tamper-protected RTC with crystal offset calibration. Power management supports automatic supply switching between main and backup rails, enabling <3 µA LCD operation during AC mains failure.

Key Specifications

Pinout & Package

100-pin LQFP (PZ) package, 14 mm × 14 mm body size, industrial temperature range (–40°C to +85°C). Pin functions verified per TI SLAS768E datasheet Section 4.2 (Terminal Functions – PZ Package).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6776IPZ, the MSP430F6775IPZ trades flash capacity for lower BOM cost while retaining identical metrology accuracy and security features; versus MSP430F6765IPZ, it adds one sigma-delta ADC channel and maintains full 3-phase+neutral compliance for revenue-grade applications.

Availability

MSP430F6775IPZ is available at Aetrix Electronics and suitable for smart grid revenue metering, industrial energy monitoring, and AMI gateway interface applications requiring stable component supply and long-term lifecycle support.

Supply support for MSP430F6775IPZ 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 delivering analog, embedded processing, and connectivity solutions with emphasis on energy efficiency and system integration.

The MSP430F677x product line was engineered specifically for polyphase electricity metering, integrating metrology-grade analog front ends, secure processing, and ultra-low-power operation to reduce bill-of-materials and certification effort.

FAQ

What is the maximum line frequency range supported by the MSP430F6775IPZ for accurate energy measurement?

The MSP430F6775IPZ supports accurate energy measurement across a 40-Hz to 70-Hz line frequency range using a single calibration point. This eliminates the need for multiple calibration tables and ensures consistent <0.1% accuracy for global utility deployments including 50 Hz (Europe/Asia) and 60 Hz (Americas) grids. The device's SD24_B modulators and digital signal processing engine maintain this specification across temperature and supply voltage variations.

Does the MSP430F6775IPZ include hardware support for secure firmware updates?

Yes, the MSP430F6775IPZ integrates a dedicated hardware AES-128 encryption module that accelerates cryptographic operations without CPU involvement. This enables secure over-the-air (OTA) firmware updates with constant-time execution, preventing timing side-channel attacks. The module supports both encryption and decryption of firmware images, and works in conjunction with the password-protected RTC and tamper-detect pins to establish a trusted boot chain.

How many independent sigma-delta ADC channels does the MSP430F6775IPZ provide, and what is their resolution?

The MSP430F6775IPZ provides seven independent 24-bit sigma-delta ADCs (SD24_B modules), each with differential inputs and programmable gain. These channels are allocated for three-phase voltage/current sensing plus neutral current and auxiliary measurements. Each ADC achieves <0.1% accuracy over 2000:1 dynamic range, meeting ANSI C12.20 Class 0.2 requirements without external calibration components.

What low-power modes are available on the MSP430F6775IPZ, and what are their typical current draws?

The MSP430F6775IPZ offers multiple low-power modes: Standby (LPM3) draws 2.1 µA at 3 V with full RAM retention and wake-up in <5 µs; RTC mode (LPM3.5) consumes 0.34 µA at 3 V for calendar/timekeeping only; and Shutdown (LPM4.5) uses 0.18 µA at 3 V for minimal state retention. These modes enable >10-year battery-backed RTC operation and rapid resumption of metrology tasks after mains interruption.

Is the MSP430F6775IPZ pin-compatible with other devices in the MSP430F677x family?

Yes, the MSP430F6775IPZ shares identical pinout and package (100-pin LQFP, PZ) with all other MSP430F677x IPZ variants (e.g., MSP430F6776IPZ, MSP430F6777IPZ). This enables hardware reuse across meter tiers - for example, designing a single PCB that supports 128 KB, 256 KB, or 512 KB flash variants through firmware configuration and BOM variation - reducing NRE and qualification effort.