Datasheet

7Maxim Integrated
Low-Current SPI/3-Wire RTCs
DS1343/DS1344
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
DS1343 BATTERY CURRENT2
vs. BATTERY VOLTAGE
DS1343/4 toc04
BATTERY VOLTAGE (V)
BATTERY CURRENT (nA)
5.04.51.5 2.0 2.5 3.53.0 4.0
200
220
240
260
280
300
320
340
180
1.0 5.5
EGFIL = 1
DOSF = 0
I
OUT
= 0mA
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
DS1344 BATTERY CURRENT2
vs. BATTERY VOLTAGE
DS1343/4 toc06
BATTERY VOLTAGE (V)
BATTERY CURRENT (nA)
5.04.54.03.53.02.52.01.5
290
340
390
440
240
1.0 5.5
EGFIL = 1, DOSF = 0, I
OUT
= 0mA
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
DS1343 BATTERY CURRENT1
vs. BATTERY VOLTAGE
DS1343/4 toc03
BATTERY VOLTAGE (V)
BATTERY CURRENT (nA)
4.5 5.04.03.53.02.52.01.5
160
180
200
220
240
260
280
140
1.0 5.5
EGFIL = 0
DOSF = 1
I
OUT
= 0mA
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
DS1344 BATTERY CURRENT1
vs. BATTERY VOLTAGE
DS1343/4 toc05
BATTERY VOLTAGE (V)
BATTERY CURRENT (nA)
5.04.53.5 4.02.0 2.5 3.01.5
220
240
260
280
300
320
340
360
380
200
1.0 5.5
EGFIL = 0, DOSF = 1, I
OUT
= 0mA
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
POWER-SUPPLY CURRENT
vs. POWER-SUPPLY VOLTAGE
DS1343/4 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
5.04.53.5 4.0
70
80
90
100
120
110
130
140
60
3.0 5.5
CE = V
IL
I
OUT
= 0mA
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
POWER-SUPPLY CURRENT
vs. POWER-SUPPLY VOLTAGE
DS1343/4 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
5.04.54.03.5
100
200
300
400
500
600
0
3.0 5.5
T
A
= +25°C
CE = V
IH
I
OUT
= 0mA
f
SCLK
= 4MHz
f
SCLK
= 1MHz