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MSP430F67681

ACTIVE
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Data sheet

MSP430F67681

ACTIVE
Data sheet Order now

Product details

CPU MSP430 Frequency (MHz) 25 Flash memory (kByte) 512 RAM (kByte) 16 ADC type 24-bit Sigma Delta Features Advanced sensing, LCD, Real-time clock UART 4 Security Secure debug Number of ADC channels 6 SPI 6 USB No Operating temperature range (°C) -40 to 85 Rating Catalog Communication interface I2C, SPI, UART Operating system BareMetal (No OS), TI RTOS Hardware accelerators 0 Nonvolatile memory (kByte) 512 Number of GPIOs 90 Number of I2Cs 2
CPU MSP430 Frequency (MHz) 25 Flash memory (kByte) 512 RAM (kByte) 16 ADC type 24-bit Sigma Delta Features Advanced sensing, LCD, Real-time clock UART 4 Security Secure debug Number of ADC channels 6 SPI 6 USB No Operating temperature range (°C) -40 to 85 Rating Catalog Communication interface I2C, SPI, UART Operating system BareMetal (No OS), TI RTOS Hardware accelerators 0 Nonvolatile memory (kByte) 512 Number of GPIOs 90 Number of I2Cs 2
LQFP (PZ) 100 256 mm² (16 mm × 16 mm) LQFP (PEU) 128 352 mm² (22 mm × 16 mm)
  • Accuracy < 0.1% Over 2000:1 Dynamic Range for Phase Current
  • Meets or Exceeds ANSI C12.20 and IEC 62053 Standards
  • Support for Multiple Sensors Such as Current Transformers, Rogowski Coils, or Shunts
  • Power Measurement for up to Three Phases Plus Neutral
  • Dedicated Pulse Output Pins for Active and Reactive Energy for Calibration
  • Four-Quadrant Measurement per Phase or Cumulative
  • Exact Phase Angle Measurements
  • Digital Phase Correction for Current Transformers
  • Temperature Compensated Energy Measurements
  • 40-Hz to 70-Hz Line Frequency Range Using Single Calibration
  • Flexible Power Supply Options With Automatic Switching
  • Display Operates at Very Low Power During AC Mains Failure: 3 µA in LPM3
  • LCD Driver With Contrast Control for up to 320 Segments
  • Password-Protected Real-Time Clock (RTC) With Crystal Offset Calibration and Temperature Compensation
  • Integrated Security Modules to Support Anti-Tamper
  • Multiple Communication Interfaces for Smart Meter Implementations
  • High-Performance 25-MHz CPU With 32-Bit Multiplier
  • Wide Input Supply Voltage Range:
    3.6 V Down to 1.8 V
  • Ultra-Low Power Consumption During Energy Measurement
    • 2.9 mW at 10-MHz Operation (3 V)
  • Multiple Low-Power Modes
    • Standby Mode (LPM3): 2.1 µA at 3 V,
      Wake up in Less Than 5 µs
    • RTC Mode (LPM3.5): 0.34 µA at 3 V
    • Shutdown Mode (LPM4.5): 0.18 µA at 3 V
  • Up to 512KB of Single-Cycle Flash
  • Up to 32KB of RAM With Single-Cycle Access
  • Up to Seven Independent 24-Bit Sigma-Delta ADCs With Differential Inputs and Variable Gain
  • System 10-Bit 200-ksps ADC
    • Six Channels Plus Supply and Temperature Sensor Measurement
  • Six Enhanced Communications Ports
    • Configurable Among Four UART, Six SPI, and Two I²C Interfaces
  • Four 16-Bit Timers With Nine Total Capture/Compare Registers
  • 128-Pin LQFP (PEU) Package With 90 I/O Pins
  • 100-Pin LQFP (PZ) Package With 62 I/O Pins
  • Industrial Temperature Range of –40°C to 85°C
  • 3-Phase Electronic Watt-Hour Meter Development Tool (Also See Tools and Software)
  • Accuracy < 0.1% Over 2000:1 Dynamic Range for Phase Current
  • Meets or Exceeds ANSI C12.20 and IEC 62053 Standards
  • Support for Multiple Sensors Such as Current Transformers, Rogowski Coils, or Shunts
  • Power Measurement for up to Three Phases Plus Neutral
  • Dedicated Pulse Output Pins for Active and Reactive Energy for Calibration
  • Four-Quadrant Measurement per Phase or Cumulative
  • Exact Phase Angle Measurements
  • Digital Phase Correction for Current Transformers
  • Temperature Compensated Energy Measurements
  • 40-Hz to 70-Hz Line Frequency Range Using Single Calibration
  • Flexible Power Supply Options With Automatic Switching
  • Display Operates at Very Low Power During AC Mains Failure: 3 µA in LPM3
  • LCD Driver With Contrast Control for up to 320 Segments
  • Password-Protected Real-Time Clock (RTC) With Crystal Offset Calibration and Temperature Compensation
  • Integrated Security Modules to Support Anti-Tamper
  • Multiple Communication Interfaces for Smart Meter Implementations
  • High-Performance 25-MHz CPU With 32-Bit Multiplier
  • Wide Input Supply Voltage Range:
    3.6 V Down to 1.8 V
  • Ultra-Low Power Consumption During Energy Measurement
    • 2.9 mW at 10-MHz Operation (3 V)
  • Multiple Low-Power Modes
    • Standby Mode (LPM3): 2.1 µA at 3 V,
      Wake up in Less Than 5 µs
    • RTC Mode (LPM3.5): 0.34 µA at 3 V
    • Shutdown Mode (LPM4.5): 0.18 µA at 3 V
  • Up to 512KB of Single-Cycle Flash
  • Up to 32KB of RAM With Single-Cycle Access
  • Up to Seven Independent 24-Bit Sigma-Delta ADCs With Differential Inputs and Variable Gain
  • System 10-Bit 200-ksps ADC
    • Six Channels Plus Supply and Temperature Sensor Measurement
  • Six Enhanced Communications Ports
    • Configurable Among Four UART, Six SPI, and Two I²C Interfaces
  • Four 16-Bit Timers With Nine Total Capture/Compare Registers
  • 128-Pin LQFP (PEU) Package With 90 I/O Pins
  • 100-Pin LQFP (PZ) Package With 62 I/O Pins
  • Industrial Temperature Range of –40°C to 85°C
  • 3-Phase Electronic Watt-Hour Meter Development Tool (Also See Tools and Software)

The TI MSP430F677x1 family of polyphase metering SoCs are powerful highly integrated solutions for revenue meters that offer accuracy and low system cost with few external components. The F677x1 family of devices uses the low-power MSP430 CPU with a 32-bit multiplier to perform all energy calculations, metering applications such as tariff rate management, and communications with AMR and AMI modules.

The F677x1 devices feature TI’s 24-bit sigma-delta converter technology, which provides better than 0.1% accuracy. Family members include up to 512KB of flash, 32KB of RAM, and an LCD controller with support for up to 320 segments.

The ultra-low-power nature of the F677x1 devices means that the system power supply can be minimized to reduce overall cost. Lowest standby power means that backup energy storage can be minimized and critical data retained longer in case of a mains power failure.

The F677x1 family of devices executes the TI energy measurement software library, which calculates all relevant energy and power results. The energy measurement software library is available with the F677x1 devices at no cost. Industry standard development tools and hardware platforms are available to speed development of meters that meet all of the ANSI and IEC standards globally.

For complete module descriptions, see the MSP430F5xx and MSP430F6xx Family User’s Guide.

The TI MSP430F677x1 family of polyphase metering SoCs are powerful highly integrated solutions for revenue meters that offer accuracy and low system cost with few external components. The F677x1 family of devices uses the low-power MSP430 CPU with a 32-bit multiplier to perform all energy calculations, metering applications such as tariff rate management, and communications with AMR and AMI modules.

The F677x1 devices feature TI’s 24-bit sigma-delta converter technology, which provides better than 0.1% accuracy. Family members include up to 512KB of flash, 32KB of RAM, and an LCD controller with support for up to 320 segments.

The ultra-low-power nature of the F677x1 devices means that the system power supply can be minimized to reduce overall cost. Lowest standby power means that backup energy storage can be minimized and critical data retained longer in case of a mains power failure.

The F677x1 family of devices executes the TI energy measurement software library, which calculates all relevant energy and power results. The energy measurement software library is available with the F677x1 devices at no cost. Industry standard development tools and hardware platforms are available to speed development of meters that meet all of the ANSI and IEC standards globally.

For complete module descriptions, see the MSP430F5xx and MSP430F6xx Family User’s Guide.
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MSP430F67681A ACTIVE Polyphase metering SoC with 6 Sigma-Delta ADCs, LCD, real-time clock, 512KB Flash, 16KB RAM This product has the same memory, peripherals including the sigma-delta ADC(s), and pin-out configuration while incorporating several errata improvements.

Technical documentation

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Top documentation Type Title Format options Date
* Data sheet MSP430F677x1, MSP430F676x1, MSP430F674x1 Polyphase Metering SoCs datasheet (Rev. D) PDF | HTML Sep 28, 2018
* Errata MSP430F67681 Microcontroller Errata (Rev. AC) PDF | HTML Jun 14, 2021
Application note Migration Guide From MSP430 MCUs to MSPM0 MCUs (Rev. B) PDF | HTML Jun 2, 2025
Application note ESD Diode Current Specification (Rev. B) PDF | HTML Aug 23, 2021
Application note MSP430 System-Level ESD Considerations (Rev. B) PDF | HTML Jul 14, 2021
User guide MSP430 MCUs Development Guide Book (Rev. A) PDF | HTML May 13, 2021
Application note Answers to Common Sigma-Delta ADC Questions on MSP MCUs PDF | HTML Aug 11, 2020
Application note Differences Between MSP430F67xx and MSP430F67xxA Devices (Rev. A) PDF | HTML Jan 13, 2020
Application note MSP430 System ESD Troubleshooting Guide PDF | HTML Dec 13, 2019
User guide MSP430x5xx and MSP430x6xx Family User's Guide (Rev. Q) Mar 15, 2018
Application note MSP430 32-kHz Crystal Oscillators (Rev. D) PDF | HTML Jul 18, 2017
Analog design Journal How delta-sigma ADCs work, Part 1 (Rev. A) Sep 19, 2016
Application note MSP Code Protection Features PDF | HTML Dec 7, 2015
Application note Designing With MSP430™ MCUs and Segment LCDs (Rev. A) PDF | HTML Jul 20, 2015
Application note MSP430 Advanced Power Optimizations: ULP Advisor SW and EnergyTrace Technology Jun 9, 2014
Application note Using TI’s DLMS COSEM Library Nov 12, 2013
Application note A Glossary of Analog-to-Digital Specifications and Performance Characteristics (Rev. B) Oct 9, 2011
Application note Design of Differential Filters for High-Speed Signal Chains (Rev. B) Apr 30, 2010

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