Extremely Accurate I
2
C-Integrated
RTC/TCXO/Crystal
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
STANDBY SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS3231 toc01
DS3231
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
V
CC
= 0V, BSY = 0,
SDA = SCL = V
BAT
OR V
CC
DS3231 toc02
150
125
100
I
CCS
(μA)
75
50
25
0
BSY = 0, SCL = SDA = V
CC
RST ACTIVE
1.2
1.1
1.0
I
BAT
(μA)
EN32kHz = 1
0.9
EN32kHz = 0
0.8
0.7
0.6
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.3
3.3
V
BAT
(V)
4.3
5.3
V
CC
(V)
SUPPLY CURRENT
vs. TEMPERATURE
DS3231 toc03
FREQUENCY DEVIATION
vs. TEMPERATURE vs. AGING VALUE
60
50
FREQUENCY DEVIATION (ppm)
40
30
20
10
0
-10
-20
-30
-40
32
127
0
-33
8
DS3231 toc04
1.0
V
CC
= 0, EN32kHz = 1, BSY = 0,
SDA = SCL = V
BAT
OR GND
0.9
I
BAT
(μA)
0.8
0.7
0.6
-40
-15
10
35
60
85
TEMPERATURE (°C)
-40
-15
10
35
60
85
TEMPERATURE (°C)
DELTA TIME AND FREQUENCY
vs. TEMPERATURE
20
0
-20
DELTA FREQUENCY (ppm)
-40
-60
-80
-100
-120
-140
-160
-180
-200
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
TEMPERATURE (°C)
-100
CRYSTAL
-20ppm
CRYSTAL
+20ppm
TYPICAL CRYSTAL,
UNCOMPENSATED
DS3231
ACCURACY
BAND
DS3231 toc05
0
-20
-40
-60
-80
DELTA TIME (MIN/YEAR)
_____________________________________________________________________
7
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
