DS1747 Datasheet, PDF (7/18 Pages) Dallas Semiconductor – Y2K-Compliant, Nonvolatile Timekeeping RAMs

DS1747/DS1747P Y2K-Compliant, Nonvolatile Timekeeping RAMs
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground……………………………………………………………..-0.3V to +6.0V
Storage Temperature Range………………………………………………………………………………...-40°C to +85°C
Soldering Temperature………………………….See IPC/JEDEC Standard J-STD-020A for Surface-Mount Devices.
See Note 7 for Through-Hole Mounted Devices.
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
Commercial
Industrial
TEMP RANGE
0°C to +70°C
-40°C to +85°C
V_CC
3.3V ±10% or 5V ±10%
3.3V ±10% or 5V ±10%
RECOMMENDED DC OPERATING CONDITIONS
(T_A = Over the Operating Range)
PARAMETER
SYMBOL MIN TYP
Logic 1 Voltage All Inputs
V_CC = 5V±10%
V_CC = 3.3V±10%
V_IH
2.2
V_IH
2.0
Logic 0 Voltage All Inputs
V_CC = 5V±10%
V_CC = 3.3V±10%
V_IL
-0.3
V_IL
-0.3
MAX
V_CC +
0.3V
V_CC +
0.3V
+0.8
+0.6
UNITS
V
V
V
V
NOTES
1
1
1
1
DC ELECTRICAL CHARACTERISTICS
(V_CC = 5.0V ± 10%, T_A = Over the Operating Range.)
PARAMETER
SYMBOL MIN
Active Supply Current
TTL Standby Current
( CE = V_IH)
CMOS Standby Current
( CE ³ V_CC - 0.2V)
Input Leakage Current
(Any Input)
Icc
Icc₁
Icc₂
I_IL
-1
Output Leakage Current
(Any Output)
Output Logic 1 Voltage
(I_OUT = -1.0 mA)
Output Logic 0 Voltage
(I_OUT = +2.1 mA)
I_OL
-1
V_OH
2.4
V_OL
Write Protection Voltage
V_PF
4.25
Battery Switchover Voltage
V_SO
TYP
MAX
85
6
4
+1
+1
0.4
V_BAT
4.50
UNITS
mA
mA
NOTES
2, 3
2, 3
mA
2, 3
mA
mA
1
1
V
1
1, 4
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