DS1339A Datasheet, PDF (6/19 Pages) Maxim Integrated Products – Low-Current, I2C, Serial Real-Time Clock

DS1339A
Low-Current, I²C, Serial Real-Time Clock
Typical Operating Characteristics
(V_CC = 3.3V, T_A = +25NC, unless otherwise noted.)
POWER SUPPLY CURRENT
vs. POWER SUPPLY VOLTAGE
180
VCC = SCL = SDA,
160 ^{VBACKUP = 3V}
140
TA = +85°C
120
100
TA = +25°C
80
60
TA = -40°C
40
1.7
2.7
3.7
4.7
5.7
SUPPLY VOLTAGE (V)
POWER SUPPLY CURRENT
vs. SCL FREQUENCY
450
VCC = SDA,
400 VBACKUP = 3V
350
fSCL = 400kHz
300
250
fSCL = 100kHz
200
150
fSCL = 1kHz
100
50
1.7
2.7
3.7
4.7
5.7
SUPPLY VOLTAGE (V)
BACKUP SUPPLY CURRENT
vs. BACKUP VOLTAGE
500
V_CC = 0V,
450 SQW OFF
400
TA = +85°C
350
300
TA = +25°C
250
200
150
TA = -40°C
100
1.3
2.3
3.3
4.3
BACKUP VOLTAGE (V)
BACKUP SUPPLY CURRENT
vs. BACKUP VOLTAGE
650
VCC = 0V,
600 SQW ON,
IOUT = 0mA
550
500
TA = +85°C
INT/SQW OUTPUT CURRENT
vs. OUTPUT VOLTAGE
0.8
VCC = 1.71V,
0.7 TA = +25°C
0.6
0.5
450
0.4
400
350
TA = +25°C
300
TA = -40°C
250
1.3
2.3
3.3
4.3
BACKUP VOLTAGE (V)
0.3
0.2
0.1
0
0
2
4
6
8
10
OUTPUT CURRENT (mA)
INT/SQW OUTPUT CURRENT
vs. OUTPUT VOLTAGE
0.4
VBACKUP = 1.3V,
VCC = 0V,
TA = +25°C
0.3
TRICKLE CHARGER RESISTORS
vs. POWER SUPPLY VOLTAGE
4000
3500
T_A = +25°C
3000
4kΩ SELECTED
2500
0.2
2000
1500
2kΩ SELECTED
0.1
1000
200Ω SELECTED
500
0
0
0.5
1.0
1.5
2.0
OUTPUT CURRENT (mA)
0
1.7
2.7
3.7
4.7
5.7
POWER SUPPLY VOLTAGE (V)
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