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DS1746/DS1746P Y2K-Compliant, Nonvolatile Timekeeping RAMs
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ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground
5.5V Version…………………………..………………………………..……………………..-0.3V to +6.0V
3.3V Version…………………………………………………………………………………..-0.3V to +4.6V
Storage Temperature Range
EDIP ...................................................……………………...………………..……………….-40°C to +85°C
PowerCap ................................................................................................................………...-55°C to +125°C
Lead Temperature (soldering, 10s)…........................................................................................……………….+260°C
Note: EDIP is hand or wave-soldered only.
Soldering Temperature (reflow, PowerCap)......................................................................................…………+260°
C
This is a stress rating only and functional operation of the device at these or any other condition 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.
OPERATING RANGE
RANGE
TEMP RANGE
VCC
Commercial
0°C to +70°C, Noncondensing
3.3V ±10% or 5V ±10%
Industrial
-40°C to +85°C, Noncondensing
3.3V ±10% or 5V ±10%
RECOMMENDED DC OPERATING CONDITIONS
(TA = Over the Operating Range)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Logic 1 Voltage All Inputs
VCC = 5V ±10%
VCC = 3.3V ±10%
VIH
2.2
VCC +
0.3V
V
1
VIH
2.0
VCC +
0.3V
V
1
Logic 0 Voltage All Inputs
VCC = 5V ± 10%
VCC = 3.3V ± 10%
VIL
-0.3
0.8
V
1
VIL
-0.3
0.6
V
1
DC ELECTRICAL CHARACTERISTICS
(VCC = 5.0V ±10%, TA = Over the Operating Range.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Active Supply Current
Icc
85
mA
2, 3, 10
TTL Standby Current
( CE = VIH)
Icc1
6
mA
2, 3
CMOS Standby Current
( CE ≥VCC-0.2V)
Icc2
4
mA
2, 3
Input Leakage Current (any input)
IIL
-1
+1
A
Output Leakage Current
(any output)
IOL
-1
+1
A
Output Logic 1 Voltage
(IOUT = -1.0 mA)
VOH
2.4
1
Output Logic 0 Voltage
(IOUT = +2.1 mA)
VOL
0.4
1
Write Protection Voltage
VPF
4.25
4.50
V
1
Battery Switchover Voltage
VSO
VBAT
1, 4
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