71M6542GT

Energy Meter ICs

Industry's Most Integrated Metering SoC Product Line and Best-in-Class Accuracy Performance

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Part Details

SoC Integration and Unique Isolation Technique Reduces BOM Cost Without Sacrificing Performance
- 0.1% Typical Accuracy Over 2000:1 Current Range
- Exceeds IEC 62053/ANSI C12.20 Standards
- Four-Quadrant Metering
- 46-64Hz Line Frequency Range with the Same Calibration
- Phase Compensation (±10°)
- Independent 32-Bit Compute Engine
- 32KB Flash, 3KB RAM (71M6541DT)
- 64KB Flash, 5KB RAM (71M6541FT/71M6542FT)
- 128KB Flash, 5KB RAM (71M6541GT/71M6542GT)
- Built-In Flash Security
- Up to Four Pulse Outputs with Pulse Count
- 8-Bit MPU (80515), Up to 5 MIPS
- Full-Speed MPU Clock in Brownout Mode
- LCD Driver Allows Up to 6 Commons/Up to 56 Pins
- Up to 51 Multifunction DIO Pins
- Hardware Watchdog Timer (WDT)
- Two UARTs for IR and AMR
- IR LED Driver with Modulation
Innovative Isolation Technology (Requires Companion 71M6xxx Sensor, also from Maxim Integrated) Eliminates Current Transformers
- Two Current Sensor Inputs with Selectable Differential Mode
- Selectable Gain of 1 or 8 for One Current Input to Support Shunts
- High-Speed Wh/VARh Pulse Outputs with Programmable Width
Digital Temperature Compensation Improves System Performance
- Metrology Compensation
- Accurate RTC for TOU Functions with Automatic Temperature Compensation for Crystal in All Power Modes
Power Management Extends Battery Life During Power Outages
- Three Battery-Backup Modes:
  - Brownout Mode (BRN)
  - LCD Mode (LCD)
  - Sleep Mode (SLP)
Wake-Up on Pin Events and Wake-On Timer
- 1µA in Sleep Mode