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IC-Hersteller Maxim Integrated

IC-Hersteller (84)

Maxim Integrated 71M6543F

71M6543F/71M6543G Energy Meter ICs


Eingangsspannung5 V
Schaltfrequenz5000 kHz


The 71M6543F/71M6543G are 4th-generation polyphase metering systems-on-chips (SoCs) with a 5MHz 8051-compatible MPU core, low-power real-time clock (RTC) with digital temperature compensation, flash memory, and LCD driver. Our Single Converter Technology® with a 22-bit delta-sigma ADC, seven analog inputs, digital metrology temperature compensation, precision voltage reference, and a 32-bit computation engine (CE) supports a wide range of metering applications with very few external components.The 71M6543F/71M6543G support optional interfaces to the 71M6xx3 series of isolated sensors that offer BOM cost reduction, immunity to magnetic tamper, and enhanced reliability. The ICs feature ultra-low-power operation in active and battery modes, 5KB shared RAM, and 64KB (71M6543F) or 128KB (71M6543G) of flash memory, which can be programmed with code and/or data during meter operation.A complete array of code development tools, demonstration code, and reference designs enable rapid development and certification of meters that meet all ANSI and IEC electricity metering standards worldwide.


    • 0.1% Typical Accuracy Over 2000:1 Current Range
    • Exceeds IEC 62053/ANSI C12.20 Standards
    • Seven Sensor Inputs with Neutral Current Measurement, Differential Mode Selectable for Current Inputs
    • Selectable Gain of 1 or 8 for One Current Input to Support Shunts
    • High-Speed Wh/VARh Pulse Outputs with Programmable Width
    • 64KB Flash, 5KB RAM (71M6543F)
    • 128KB Flash, 5KB RAM (71M6543G)
    • Up to Four Pulse Outputs with Pulse Count
    • Four-Quadrant Metering, Phase Sequencing
    • Digital Temperature Compensation:
  • Metrology Compensation
  • Accurate RTC for TOU Functions with Automatic Temperature Compensation for Crystal in All Power Modes
    • Independent 32-Bit Compute Engine
    • 46-64Hz Line Frequency Range with the Same Calibration
    • Phase Compensation (±7°)
    • Three Battery-Backup Modes:
  • Brownout Mode LCD Mode Sleep Mode
    • Wake-Up on Pin Events and Wake-on-Timer
    • 1μA in Sleep Mode
    • Flash Security
    • In-System Program Update
    • 8-Bit MPU (80515), Up to 5MIPS
    • Full-Speed MPU Clock in Brownout Mode
    • LCD Driver:
  • 6 Common Segment Drivers
  • Up to 56 Selectable Pins
    • Up to 51 Multifunction DIO Pins
    • Hardware Watchdog Timer (WDT)
    • I2C/MICROWIRE® EEPROM Interface
    • SPI Interface with Flash Program Capability
    • Two UARTs for IR and AMR
    • IR LED Driver with Modulation
    • Industrial Temperature Range
    • 100-Pin Lead-Free LQFP Package

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