71M6542FT-IGTR/F

Overview

The 71M6542FT-IGTR/F is a fourth-generation single-phase metering System on Chip (SoC) from Analog Devices Inc./Maxim Integrated. It integrates a 5 MHz 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 or four analog inputs, digital temperature compensation, a precision voltage reference, and a 32-bit computation engine. It operates at 3.3 V with 64 kB of program memory and 5 kB of data RAM in a 100-LQFP package.

Feature Summary

• Integrates a 5 MHz 8051-compatible microprocessor unit core with low-power real-time clock and digital temperature compensation.
• Employs Single Converter Technology with a 22-bit delta-sigma ADC for high-precision energy measurement.
• Includes a 32-bit computation engine and precision voltage reference to support wide-range metering applications.
• Features built-in flash memory and LCD driver capabilities for standalone operation.

Applications

• Residential single-phase electricity meters
• Smart grid metering systems
• Precision energy monitoring devices

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential supply chain variations. Confirm the specific suffix 'T' indicates tape-and-reel packaging if required for automated assembly. Check current product status as legacy components may have limited availability or end-of-life notifications. Ensure environmental compliance documentation matches regional regulatory requirements before procurement.

Selection Notes

Select this SoC for designs requiring integrated metrology processing without external dedicated metering chips. The 22-bit ADC resolution supports accuracy standards such as IEC 62053 and ANSI C12.20. Consider the 100-LQFP package size for PCB layout constraints. Evaluate the 64 kB flash capacity against application firmware requirements. The 5 MHz CPU speed is sufficient for standard utility metering algorithms.

Part Context

This component belongs to the Teridian 71M6x01 series of fourth-generation single-phase metering SoCs. It is designed to reduce bill of materials cost by integrating analog and digital functions onto a single chip. The series supports optional interfaces to isolated sensors for enhanced reliability and tamper immunity. It represents a mature platform for residential utility metering applications.

Replacement Considerations

The 71M6542G-IGTR/F is a documented variant within the same family offering similar functionality. Verify pin compatibility and memory configuration differences when substituting. Other members of the 71M654x series may serve as alternatives depending on specific memory or I/O requirements.