71M6542FT-IGT/F

Overview

The 71M6542FT-IGT/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, a low-power RTC with digital temperature compensation, and 64 kB of Flash memory. The device features Single Converter Technology® with a 22-bit delta-sigma ADC, three or four analog inputs, and a 32-bit computation engine. Packaged in a 100-pin LQFP, it operates at 3.3 V within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates a 5 MHz 8051-compatible microprocessor unit with low-power real-time clock and digital temperature compensation for precise timekeeping.
• Utilizes Single Converter Technology featuring a 22-bit delta-sigma ADC and a dedicated 32-bit computation engine for high-precision energy measurement.
• Includes 64 kB of Flash memory allowing for in-field programming of code and data during meter operation.
• Supports optional interfaces to isolated sensors to reduce bill of materials cost and enhance immunity to magnetic tampering.

Applications

• Residential electricity meters
• Smart grid metering systems
• Prepayment metering applications

Procurement Notes

Verify the specific suffix configuration against current manufacturer documentation, as availability may vary. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the selected package variant matches the target PCB footprint requirements for the 100-LQFP housing.

Selection Notes

Select this component for single-phase metering designs requiring high accuracy over a wide dynamic range. The integrated LCD driver and multiple I/O pins simplify interface design. Consider the 64 kB Flash capacity for complex firmware requirements compared to lower-memory variants in the series.

Part Context

This part belongs to the Teridian 71M6x01 family of fourth-generation metering SoCs. It shares architectural similarities with the 71M6541 series but offers increased Flash memory capacity. The series is designed to meet ANSI and IEC standards using minimal external components.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate other members of the 71M654x family, such as the 71M6541G or 71M6542G, for potential pin-compatible alternatives if supply constraints exist.