71M6543H-IGT/F

Overview

The 71M6543H-IGT/F is a fourth-generation polyphase metering system-on-chip (SoC) manufactured by Analog Devices Inc./Maxim Integrated. It integrates a 5MHz 8051-compatible microprocessor unit (MPU) core with low-power real-time capabilities for energy metering applications. The device supports three-phase metering and features four current sensor inputs with selectable differential mode. One current input allows for a selectable gain of 1 or 8 to support neutral current shunt measurements. It operates within a supply voltage range of 3V to 3.6V and functions at temperatures between -40°C and 85°C.

Feature Summary

• Integrates a 5MHz 8051-compatible MPU core for efficient processing in metering systems
• Supports four current sensor inputs with selectable differential mode configuration
• Provides selectable gain options of 1 or 8 for one current input to accommodate neutral current shunt requirements

Applications

• Three-phase energy metering systems
• Polyphase metering applications requiring integrated MCU and ADC functionality
• Smart grid infrastructure components

Procurement Notes

Verify the specific suffix 'H' against official Analog Devices documentation to confirm pinout and feature set compatibility, as variations exist within the 71M6543 family. Ensure the 100-LQFP package matches your PCB footprint design. Confirm that the operating temperature range of -40°C to 85°C meets your environmental specifications before finalizing procurement.

Selection Notes

Select this component when a combined MCU and high-precision metering front-end is required for three-phase applications. The integrated 8051 core reduces external component count compared to discrete solutions. Consider the 5MHz clock speed for application complexity; if higher processing power is needed, evaluate other members of the 71M65xx series. Verify interface compatibility with external communication modules.

Part Context

This part belongs to the 71M6543F/H/G family of fourth-generation polyphase metering SoCs from Maxim Integrated (now Analog Devices). These devices are designed to replace traditional multi-chip metering solutions by integrating analog front-ends with digital processing cores. The H variant specifically denotes certain internal configurations or revisions within this generation, distinct from the F and G variants which may have different peripheral sets or calibration data.

Replacement Considerations

Official substitutes include the 71M6543F-IGT/F and 71M6543G-IGT/F, provided their specific pinouts and feature sets align with the design requirements. Cross-referencing the datasheet for each candidate is essential to ensure functional equivalence in terms of current input handling and MCU integration.