DS1343_1112 Datasheet, PDF (7/20 Pages) Maxim Integrated Products – Low-Current SPI/3-Wire RTCs

Low-Current SPI/3-Wire RTCs
(VCC = +3.3V, TA = +25°C, unless otherwise noted.)
POWER-SUPPLY CURRENT
vs. POWER-SUPPLY VOLTAGE
600
TA = +25°C
500
CE = VIH
IOUT = 0mA
400
fSCLK = 4MHz
300
200
fSCLK = 1MHz
100
0
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
DS1343 BATTERY CURRENT1
vs. BATTERY VOLTAGE
280
EGFIL = 0
260 ^{DOSF = 1}
IOUT = 0mA
240
TA = +85°C
220
200
TA = +25°C
180
T_A = -40°C
160
140
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
BATTERY VOLTAGE (V)
DS1344 BATTERY CURRENT1
vs. BATTERY VOLTAGE
380
EGFIL = 0, DOSF = 1, IOUT = 0mA
360
340
320
TA = +85°C
300
280
TA = +25°C
260
240
TA = -40°C
220
200
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
BATTERY VOLTAGE (V)
Typical Operating Characteristics
POWER-SUPPLY CURRENT
vs. POWER-SUPPLY VOLTAGE
140
CE = VIL
130 IOUT = 0mA
120
TA = +85°C
110
100
TA = +25°C
90
80
T_A = -40°C
70
60
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
DS1343 BATTERY CURRENT2
vs. BATTERY VOLTAGE
340
EGFIL = 1
320 DOSF = 0
IOUT = 0mA
300
280
TA = +85°C
260
TA = +25°C
240
TA = -40°C
220
200
180
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
BATTERY VOLTAGE (V)
DS1344 BATTERY CURRENT2
vs. BATTERY VOLTAGE
440
EGFIL = 1, DOSF = 0, IOUT = 0mA
390
TA = +85°C
340
TA = +25°C
290
TA = -40°C
240
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
BATTERY VOLTAGE (V)
7