71M6521DE/71M6521FE
Energy Meter IC
DATASHEET
JANUARY 2008
CE Calculations...............................................................................................................................80
CE STATUS ....................................................................................................................................80
CE TRANSFER VARIABLES ..........................................................................................................82
ELECTRICAL SPECIFICATIONS................................................................................................................................86
ABSOLUTE MAXIMUM RATINGS ................................................................................................................86
RECOMMENDED EXTERNAL COMPONENTS ...........................................................................................87
RECOMMENDED OPERATING CONDITIONS ............................................................................................87
PERFORMANCE SPECIFICATIONS............................................................................................................88
INPUT LOGIC LEVELS...................................................................................................................88
OUTPUT LOGIC LEVELS...............................................................................................................88
POWER-FAULT COMPARATOR....................................................................................................88
BATTERY MONITOR......................................................................................................................88
SUPPLY CURRENT........................................................................................................................89
V3P3D SWITCH..............................................................................................................................89
2.5V VOLTAGE REGULATOR........................................................................................................89
LOW POWER VOLTAGE REGULATOR.........................................................................................89
CRYSTAL OSCILLATOR ................................................................................................................90
VREF, VBIAS ..................................................................................................................................90
LCD DRIVERS ................................................................................................................................90
ADC CONVERTER, V3P3A REFERENCED...................................................................................91
OPTICAL INTERFACE....................................................................................................................91
TEMPERATURE SENSOR .............................................................................................................91
TIMING SPECIFICATIONS ...........................................................................................................................92
FLASH MEMORY TIMING ..............................................................................................................92
EEPROM INTERFACE....................................................................................................................92
RESET and V1 ................................................................................................................................92
RTC.................................................................................................................................................92
TYPICAL PERFORMANCE DATA ..................................................................................................93
PACKAGE OUTLINE (LQFP 64) ...................................................................................................................94
PACKAGE OUTLINE (QFN 68).....................................................................................................................95
PINOUT (LQFP-64) .......................................................................................................................................96
PINOUT (QFN 68) .........................................................................................................................................96
Recommended PCB Land Pattern for the QFN-68 Package.........................................................................97
PIN DESCRIPTIONS.....................................................................................................................................98
Power/Ground Pins:.........................................................................................................................98
Analog Pins: ....................................................................................................................................98
Digital Pins:......................................................................................................................................99
I/O Equivalent Circuits:..................................................................................................................100
ORDERING INFORMATION .......................................................................................................................101
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