RTC with Constant-Voltage Trickle Charger
DS12R885/DS12CR887/DS12R887
ABSOLUTE MAXIMUM RATINGS
Voltage Range on V
CC
Pin Relative to Ground .....-0.3V to +6.0V
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature .......................................See IPC/JEDEC
J-STD-020A Specification
Soldering Temperature (leads, 10s) ................................+260°C
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.
DC ELECTRICAL CHARACTERISTICS
(V
CC
= V
CC(MIN)
to V
CC(MAX)
, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
Supply Voltage (Note 2)
V
BACKUP
Input Voltage
(DS12R885 Only)
Input Logic 1
Input Logic 0
V
CC
Power-Supply Current
(Note 3)
V
CC
Standby Current (Note 4)
Input Leakage
I/O Leakage
Input Current
Output Current at 2.4V
Output Current at 0.4V
Power-Fail Voltage (Note 2)
VRT Trip Point
Trickle-Charger Current-Limiting
Resistor
Trickle-Charger Output Voltage
SYMBOL
V
CC
V
BACKUP
V
IH
V
IL
I
CC1
I
CCS
I
IL
I
OL
I
MOT
I
OH
I
OL
V
PF
VRT
TRIP
R1
V
OUT
(Note 5)
(Note 6)
(Note 2)
(Note 2)
-33
-5
-33
-5
DS12R885 Only
DS12R885 Only
2.7
4.05
2.88
4.33
1.3
10
3.05
-33
-5
(Note 2)
(Note 2)
(Note 2)
-33
-5
-5
-33
-1.0
-1.0
-1.0
-1.0
4.0
2.97
4.5
CONDITIONS
MIN
2.97
4.5
2.0
2.2
-0.3
0.7
0.8
0.250
0.140
TYP
3.3
5.0
MAX
3.63
5.5
V
OUT
V
CC
+
0.3
+0.8
2
2
0.5
0.3
+1.0
+1.0
+500
UNITS
V
V
V
V
mA
mA
µA
µA
µA
mA
mA
V
V
kΩ
V
2
_____________________________________________________________________
DALLAS [ DALLAS SEMICONDUCTOR ]
