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VT82887
Real Time Clock
VIA Technologies, Inc.
VOLTAGE ON ANY PIN RELATIVE TO GROUND -0.3V TO +7.0V
OPERATING TEMPERATURE
0
°C TO 70°C
STORAGE TEMPERATURE
-40
°C TO +70°C
SOLDERING TEMPERATURE
260
°C FOR 10 SECONDS
*This is a stress rating only and functional operation of the device at these or any other conditions
above those indicated in the operation sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS (0
°C TO 70°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Power Supply Voltage
VCC
4.5
5.0
5.5
V
1
Input Logic 1
VIH
2.2
VCC+0.3
V
1
Input Logic 0
VIL
-0.3
+0.8
V
1
DC ELECTRICAL CHARACTERISTICS (0
°C TO 70°C, VCC = 4.5 TO 5.5V)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Power Supply Current
ICC1
510
mA
2
Input Leakage
IIL
-1.0
+1.0
µA
3
I/O Leakage
ILO
-1.0
+1.0
µA
4
Input Current
IMOT
-1.0
+500
µA
3
Output @ 2.4V
IOH
-1.0
mA
1,5
Output @ 0.4V
IOL
4.0
mA
1
Write Protect Voltage
VTP
4.04.254.5
V
CAPACITANCE (tA = 25°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Input Capacitance
CIN
5pF
Output Capacitance
COUT
7pF
AC ELECTRICAL CHARACTERISTICS (0
°C TO 70°C, VCC = 4.5V TO 5.5V)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Cycle Time
tCYC
385
DC
ns
Pulse Width, DS/E Low or
RD/WR# High
PWEL
150
ns
Pulse Width, DS/E High or
RD/WR# Low
PWEH
125
ns
Input Rise and Fall Time
tR, tF
30
ns