RTC with Constant-Voltage Trickle Charger
Typical Operating Characteristics
(V
= +3.3V, T = +25°C, unless otherwise noted.)
A
CC
I
vs. V
BACKUP
(DS12R885)
BACKUP
V
vs. V vs. I
CC
(DS12R885)
BACKUP
BACKUP
DS12R885 toc02
625
600
575
550
3.0
2.8
2.6
2.4
2.2
2.0
0µA
V
= 0V
CC
-15µA
-30µA
-45µA
-60µA
2.0
2.3
2.5
2.8
3.0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V
(V)
BACKUP
V
CC
OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
I vs. TEMPERATURE
BACKUP
(DS12R885)
32768.10
32768.08
32768.06
32768.04
32768.02
32768.00
32767.98
32767.96
32767.94
32767.92
32767.90
650
625
600
575
550
525
500
475
450
V
V
= 0V,
CC
= 3.0V
BACKUP
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY (V)
-40 -25 -10
5
20 35 50 65 80
TEMPERATURE (°C)
8
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DALLAS [ DALLAS SEMICONDUCTOR ]
