71M6521DE/71M6521FE
Energy Meter IC
DATASHEET
JANUARY 2008
I/O Equivalent Circuits:
V3P3D
V3P3D
V3P3A
110K
Digital
Input
Pin
CMOS
Input
from
internal
reference
VREF
Pin
LCD SEG
Output
Pin
LCD
Driver
GNDD
GNDA
GNDD
VREF Equivalent Circuit
Digital Input Equivalent Circuit
Type 1:
LCD Output Equivalent Circuit
Type 5:
Type 9:
VREF
Standard Digital Input or
pin configured as DIO Input
with Internal Pull-Up
LCD SEG or
pin configured as LCD SEG
V3P3D
V3P3A
V3P3D
Digital
Input
Pin
CMOS
Input
Analog
To
from
internal
reference
V2P5
Pin
Input
MUX
Pin
110K
GNDD
GNDD
GNDA
GNDD
Digital Input
Analog Input Equivalent Circuit
V2P5 Equivalent Circuit
Type 2:
Type 6:
Type 10:
Pin configured as DIO Input
with Internal Pull-Down
ADC Input
V2P5
V3P3D
V3P3A
Digital
Input
Pin
CMOS
Input
Comparator
Power
Down
Circuits
VBAT
Pin
To
Input
Pin
Comparator
GNDD
GNDA
GNDD
Digital Input Type 3:
Standard Digital Input or
pin configured as DIO Input
Comparator Input Equivalent
Circuit Type 7:
VBAT Equivalent Circuit
Type 12:
ComparatorInput
VBAT Power
V3P3D
V3P3D
10
from
Digital
Output
Pin
V3P3SYS
CMOS
Output
V3P3D
Pin
Oscillator
Pin
To
Oscillator
40
GNDD
GNDD
from
VBAT
GNDD
V3P3D Equivalent Circuit
Type 13:
Digital Output Equivalent Circuit
Type 4:
Standard Digital Output or
pin configured as DIO Output
Oscillator Equivalent Circuit
Type 8:
V3P3D
OscillatorI/O
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© 2005-2008 TERIDIAN Semiconductor Corporation
v1.0
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
