71M6542F-IGT/F

Overview

The 71M6542F-IGT/F is a fourth-generation single-phase metering System on Chip (SoC) manufactured by Maxim Integrated. It integrates a 5MHz 8051-compatible MPU core, low-power RTC with digital temperature compensation, flash memory, and an LCD driver. The device utilizes Single Converter Technology featuring a 22-bit delta-sigma ADC, three analog inputs, precision voltage reference, and a 32-bit computation engine. It operates on a 3.3V supply within a -40°C to +85°C temperature range. The component is housed in a 100-pin LFQFP package.

Feature Summary

• Integrates a 5MHz 8051-compatible microprocessor unit with flash memory and real-time clock capabilities
• Employs Single Converter Technology with a 22-bit delta-sigma ADC for high-precision measurement
• Includes a dedicated 32-bit computation engine for efficient power calculations
• Supports optional interfaces for isolated sensors to reduce bill of materials cost

Applications

• Residential single-phase electricity meters
• Smart metering systems compliant with ANSI C12.20 standards
• Metering applications requiring IEC 62053 compliance
• Energy monitoring devices utilizing isolated sensor inputs

Procurement Notes

Verify the specific suffix 'IGT' against the manufacturer's current datasheet to confirm package type and lead-free status. Ensure compatibility with existing firmware development tools, such as Keil μVision, when integrating Compute Engine code images. Confirm that the 100-pin LFQFP footprint matches the target PCB design requirements before finalizing procurement.

Selection Notes

Select this component for designs requiring integrated metering processing without external calculation engines. The 22-bit ADC resolution supports high accuracy over wide dynamic ranges. Consider the available flash memory size for application code storage. Verify that the 3.3V operating voltage aligns with the system power architecture and that the 100-pin package fits the mechanical constraints.

Part Context

This part belongs to the Teridian 71M654x series of fourth-generation single-phase metering SoCs. The series shares architectural similarities with the 71M6541 and 71M6543 models, differing primarily in memory configurations and pin assignments. These devices are designed to replace older discrete metering solutions by consolidating analog front-end and digital processing functions onto a single chip.

Replacement Considerations

Publicly confirmed substitute part numbers for this specific model were not identified in the provided documentation.