Datasheet

±5ppm, I
2
C Real-Time Clock
6 Maxim Integrated
DS3231M
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
FREQUENCY ERROR
vs. TEMPERATURE
DS3231M toc06
TEMPERATURE (°C)
FREQUENCY ERROR (ppm)
500
-8
-6
-4
-2
0
2
4
6
8
10
-10
-50 100
LIMITS
V
CC
= 3.3V
RST OUTPUT VOLTAGE
vs. POWER SUPPLY VOLTAGE
DS3231M toc05
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE (V)
42
1
2
3
4
5
6
0
06
V
BAT
= 3.0V,
T
A
= +25°C
TRACKS WITH V
CC
RST OUTPUT VOLTAGE
vs. OUTPUT CURRENT
DS3231M toc04
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
4321
0.1
0.2
0.3
0.4
0.5
0
05
V
CC
= 2.45V,
V
BAT
= 3.0V,
T
A
= +25°C
INT/SQW OUTPUT VOLTAGE
vs. OUTPUT CURRENT
DS3231M toc03
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
8642
0.1
0.2
0.3
0.4
0.5
0
01
0
V
CC
= 2.3V,
V
BAT
= 0V,
T
A
= +25°C
BATTERY-SUPPLY CURRENT
vs. BATTERY-SUPPLY VOLTAGE
DS3231M toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
543
1.5
2.0
2.5
3.0
3.5
4.0
1.0
26
V
CC
= 0V, EN32KHZ = 1, BBSQW = 0
+85°C
+25°C
-40°C
POWER-SUPPLY CURRENT
vs. POWER-SUPPLY VOLTAGE
DS3231M toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
543
60
70
80
90
100
110
120
130
140
150
50
26
V
BAT
= 2.3V, EN32KHZ = 1, I
OUT
= 0mA
INCREASE BELOW V
PF
DUE TO INTERNAL PULLUP
RESISTOR ON RST
+85°C
+25°C
-40°C
POWER-SUPPLY CURRENT
vs. SCL FREQUENCY
DS3231M toc07
SCL FREQUENCY (kHz)
SUPPLY CURRENT (µA)
300200100
90
100
110
120
130
140
150
160
170
180
190
200
80
0 400
T
A
= +25°C
+5.5V
+2.7V
+3.5V