71M6541DT-IGT/F

Overview

The 71M6541DT-IGT/F is a fourth-generation single-phase metering System-on-Chip (SoC) from the Maxim Integrated 71M6x01 series, now under Analog Devices. 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 supports optional isolated sensor interfaces for BOM cost reduction and magnetic tamper immunity. The component operates at 3.3V, features 32KB flash and 2KB RAM, and is housed in a 64-pin LQFP package.

Feature Summary

• Integrates a 5MHz 8051-compatible microprocessor unit with advanced power management for ultra-low-power operation in active and battery modes.
• Employs Single Converter Technology with a 22-bit delta-sigma ADC and 32-bit computation engine to support high-precision metering applications with minimal external components.
• Includes a low-power real-time clock with digital temperature compensation and flash memory capable of in-field programming during meter operation.
• Supports differential current sensor inputs and selectable gain configurations to accommodate various sensing technologies and shunt resistors.

Applications

• Residential single-phase electricity meters
• Smart grid metering systems compliant with ANSI and IEC standards
• Time-of-use (TOU) energy monitoring devices

Procurement Notes

Verify that the specific suffix -IGT/F corresponds to the lead-free LQFP-64 packaging and industrial temperature range (-40°C to +85°C). Confirm that the manufacturer designation reflects the post-acquisition status under Analog Devices, as Maxim Integrated operations were fully integrated into ADI. Ensure compatibility with existing design tools and reference designs provided by the manufacturer for certification purposes.

Selection Notes

Select this component for applications requiring high accuracy over a wide dynamic range, specifically 0.1% accuracy over a 2000:1 current range. Choose this SoC when system integration benefits are prioritized, such as reducing bill of materials through integrated isolation sensor support. Consider the 32KB flash capacity for complex firmware requirements and the availability of comprehensive development tools for rapid certification against global standards.

Part Context

This device belongs to the Teridian 71M6x01 family of fourth-generation single-phase metering SoCs. The series includes variants like the 71M6541F/G and 71M6542F/G, which share the core architecture but differ in memory sizes and pin counts. The 71M6541DT variant specifically denotes the 64-pin configuration with 32KB flash and 2KB RAM, designed for compact residential metering solutions.

Replacement Considerations

Compatible substitutes within the same family include the 71M6541FT, which offers increased flash and RAM capacity, and the 71M6541G. For higher pin count requirements, the 71M6542 series provides additional I/O capabilities. Verify pinout compatibility and memory allocation before substituting to ensure firmware integrity.