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DS12R885/DS12CR887/DS12R887
RTCs with Constant-Voltage Trickle Charger
2
Maxim Integrated
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Voltage Range on VCC Pin Relative to Ground .....-0.3V to +6.0V
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range
EDIP, BGA ........................................................-40°C to +85°C
SO ...................................................................-55°C to +125°C
Lead Temperature (soldering, 10s) .................................+260°C
(Note: EDIP is hand or wave-soldered only.)
Soldering Temperature (reflow)
SO .................................................................................+260°C
BGA...............................................................................+225°C
DC ELECTRICAL CHARACTERISTICS
(VCC = VCC(MIN) to VCC(MAX), TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
-33
2.97
3.3
3.63
Supply Voltage (Note 2)
VCC
-5
4.5
5.0
5.5
V
VBACKUP Input Voltage
(DS12R885 Only)
VBACKUP
(Note 2)
2.0
VOUT
V
Input Logic 1
VIH
(Note 2)
2.2
VCC +
0.3
V
Input Logic 0
VIL
(Note 2)
-0.3
+0.8
V
-33
0.7
2
VCC Power-Supply Current
(Note 3)
ICC1
-5
0.8
2
mA
-5
0.250
0.5
VCC Standby Current (Note 4)
ICCS
-33
0.140
0.3
mA
Input Leakage
IIL
-1.0
+1.0
μA
I/O Leakage
IOL
(Note 5)
-1.0
+1.0
μA
Input Current
IMOT
(Note 6)
-1.0
+500
μA
Output Current at 2.4V
IOH
(Note 2)
-1.0
mA
Output Current at 0.4V
IOL
(Note 2)
4.0
mA
-33
2.7
2.88
2.97
Power-Fail Voltage (Note 2)
VPF
-5
4.05
4.33
4.5
V
-33
VRT Trip Point
VRTTRIP
-5
1.3
V
Trickle-Charger Current-Limiting
Resistor
R1
DS12R885 Only
10
k
Trickle-Charger Output Voltage
VOUT
DS12R885 Only
3.05
V
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