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