DESCRIPTION
The Teridian 78M6618 is a highly integrated IC for independent monitoring and measurement of up to eight single-phase AC outlets. With multiple host interface options, an integrated LCD driver, and configurable I/Os, the device is ideal for metered power distribution units (PDUs) and rack enclosures for the data center, as well as intelligent power strips and subpanels in the grid-friendly digital home.

FEATURES
• < 0.5% Wh Accuracy Over Wide 2000:1 Current Range and Over Temperature
• Exceeds IEC 62053/ANSI C12.20 Standards
• Voltage Reference < 40ppm/°C
• 10 Sensor Inputs—V3P3 Referenced
• 21-Bit Delta-Sigma ADC with Independent 32-Bit Compute Engine (CE)
• 8-Bit MPU (80515), One Clock Cycle per Instruction with 4KB MPU XRAM
• 128KB Flash with Security
• Integrated ICE for MPU Debug
• 32kHz Time Base with Hardware Watchdog Timer
• UART and High-Speed Slave SPI Host Interface Options
• Up to 19 General-Purpose 5V Tolerant I/O Pins
• LCD Driver (Up to 70 Pixels)
• Packaged in a Lead(Pb)-Free/RoHS-Compliant (6/6) 68-Pin QFN
• Robust Sub-Metering Application Firmware:
    o True RMS Calculations for Current, Voltage, Line Frequency, Real Power, Reactive Power, Apparent Power, and Power Factor
    o Accumulated Watt-Hours, Kilowatt-Hours, and Cost
    o Intelligent Switch Control at Zero Crossings
    o Digital Temperature Compensation
    o Phase Compensation (±15°)
    o Quick Calibration Routines
    o 46-64Hz Line Frequency Range with Same Calibration
    o Programmable Alarm Thresholds
    o High-Level UART Communication Protocols
    o High-Level SPI Communication Protocols