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Maxim Integrated
Low-Current SPI/3-Wire RTCs
DS1343/DS1344
Typical Operating Characteristics
(VCC = +3.3V, TA = +25°C, unless otherwise noted.)
DS1343 BATTERY CURRENT2
vs. BATTERY VOLTAGE
DS1343/4
toc04
BATTERY VOLTAGE (V)
BATTERY
CURRENT
(nA)
5.0
4.5
1.5 2.0 2.5
3.5
3.0
4.0
200
220
240
260
280
300
320
340
180
1.0
5.5
EGFIL = 1
DOSF = 0
IOUT = 0mA
TA = +85°C
TA = +25°C
TA = -40°C
DS1344 BATTERY CURRENT2
vs. BATTERY VOLTAGE
DS1343/4
toc06
BATTERY VOLTAGE (V)
BATTERY
CURRENT
(nA)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
290
340
390
440
240
1.0
5.5
EGFIL = 1, DOSF = 0, IOUT = 0mA
TA = +85°C
TA = +25°C
TA = -40°C
DS1343 BATTERY CURRENT1
vs. BATTERY VOLTAGE
DS1343/4
toc03
BATTERY VOLTAGE (V)
BATTERY
CURRENT
(nA)
4.5 5.0
4.0
3.5
3.0
2.5
2.0
1.5
160
180
200
220
240
260
280
140
1.0
5.5
EGFIL = 0
DOSF = 1
IOUT = 0mA
TA = +85°C
TA = +25°C
TA = -40°C
DS1344 BATTERY CURRENT1
vs. BATTERY VOLTAGE
DS1343/4
toc05
BATTERY VOLTAGE (V)
BATTERY
CURRENT
(nA)
5.0
4.5
3.5 4.0
2.0 2.5 3.0
1.5
220
240
260
280
300
320
340
360
380
200
1.0
5.5
EGFIL = 0, DOSF = 1, IOUT = 0mA
TA = +85°C
TA = +25°C
TA = -40°C
POWER-SUPPLY CURRENT
vs. POWER-SUPPLY VOLTAGE
DS1343/4
toc02
SUPPLY VOLTAGE (V)
SUPPLY
CURRENT
(A)
5.0
4.5
3.5
4.0
70
80
90
100
120
110
130
140
60
3.0
5.5
CE = VIL
IOUT = 0mA
TA = +85°C
TA = +25°C
TA = -40°C
POWER-SUPPLY CURRENT
vs. POWER-SUPPLY VOLTAGE
DS1343/4
toc01
SUPPLY VOLTAGE (V)
SUPPLY
CURRENT
(A)
5.0
4.5
4.0
3.5
100
200
300
400
500
600
0
3.0
5.5
TA = +25°C
CE = VIH
IOUT = 0mA
fSCLK = 4MHz
fSCLK = 1MHz
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