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Extremely Accurate I2C RTC with
Integrated Crystal and SRAM
STANDBY SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS3232
toc01
VCC (V)
SUPPLY
CURRENT
(nA)
5.3
4.8
4.3
2.8
3.3
3.8
50
100
150
125
75
25
0
2.3
RST ACTIVE
SCL = SDA = VCC
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS3232
toc02
VBAT (V)
SUPPLY
CURRENT
(nA)
5.3
4.8
4.3
2.8
3.3
3.8
800
900
1000
950
850
750
700
2.3
VCC = 0V
BB32kHz = 0
BBSQW = 0
BSY = 0
SUPPLY CURRENT
vs. TEMPERATURE
DS3232
toc03
TEMPERATURE (
°C)
SUPPLY
CURRENT
(μ
A)
80
60
40
-20
020
0.700
0.800
0.900
0.600
-40
VCC = 0V
BB32kHz = 0
VBAT = 3.4V
VBAT = 3.0V
FREQUENCY DEVIATION
vs. TEMPERATURE vs. AGING
DS3232
toc04
TEMPERATURE (
°C)
FREQUENCY
DEVIATION
(ppm)
80
60
40
-20
020
35
25
15
5
-5
-15
-25
-35
75
65
55
45
-45
-40
AGING = -128
AGING = -33
AGING = +127
AGING = 0
AGING = +32
Typical Operating Characteristics
(VCC = +3.3V, TA = +25°C, unless otherwise noted.)
DELTA TIME AND FREQUENCY
vs. TEMPERATURE
TEMPERATURE (
°C)
DELTA
FREQUENCY
(ppm)
DELTA
TIME
(MIN/YEAR)
80
70
50 60
-10 0 10 20 30 40
-30 -20
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
20
-200
-80
-60
-40
-20
0
-100
-40
DS3232 toc05
CRYSTAL
+20ppm
CRYSTAL
-20ppm
TYPICAL CRYSTAL,
UNCOMPENSATED
DS3232
ACCURACY
BAND
DS3232
7
Maxim Integrated
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