DS1308 Datasheet, PDF (6/16 Pages) Dallas Semiconductor – 64 X 8 Serial Real Time Clock

DS1308
Low-Current I²C RTC with 56-Byte NV RAM
(V_CC = +3.3V, T_A = +25NC, unless otherwise specified.)
Typical Operating Characteristics
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
150
SQWE = 1, IOUT = 0mA
140
130
+85°C
120
110
100
+25°C
90
-40°C
80
70
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
BATTERY CURRENT (SQW OFF)
vs. BATTERY VOLTAGE
400
SQWE = 0, IOUT = 0mA
350
+85°C
300
250
200
+25°C
150
-40°C
100
1.5
2.5
3.5
4.5
5.5
BATTERY VOLTAGE (V)
BATTERY CURRENT (SQW ON)
vs. BATTERY VOLTAGE
800 ^{RS1 = RS0 = SQWE = 1,}
IOUT = 0mA
700
600
+85°C
500
+25°C
400
300
-40°C
200
1.5
2.5
3.5
4.5
5.5
BATTERY VOLTAGE (V)
SQW/CLKIN OUTPUT-VOLTAGE LOW
vs. OUTPUT CURRENT
0.4
TA = +25°C,
OUT = ECLK = SQWE = 0
0.3
VCC = 1.3V
0.2
0.1
VCC = 5.0V
V_CC = 3.0V
0
0
1
2
3
4
OUTPUT CURRENT (mA)
POWER-SUPPLY CURRENT
vs. SCL FREQUENCY
200
TA = +25°C,
IOUT = 0mA
150
5.0V
100
50
0
3.0V
100
200
300
400
SCL FREQUENCY (kHz)
����������������������������������������������������������������� Maxim Integrated Products  6