Typical Performance Curves
Fig. 1 LED Forward Voltage vs. Forward Current
Fig. 2 Normalized Current Transfer Ratio vs.
2.0
1.8
1.4
1.2
Forward Current
1.0
1.6
0.8
1.4
T A = -40°C
0.6
1.2
1.0
0.8
T A = 25°C
T A = 100°C
0.4
0.2
0.0
Normalized to:
I F = 5mA
V CE = 5V
T A = 25 ° C
0.1
1 10
100
0.1
1 10
1.4
I F – LED FORWARD CURRENT (mA)
Fig. 3 Normalized CTR vs. Temperature
Normalized to:
10
I F – FORWARD CURRENT (mA)
Fig. 4 Normalized Collector vs.
Collector-Emitter Voltage
1.2
1.0
I F = 5mA
V CE = 5V
T A = 25 ° C
I F = 10mA
I F = 5mA
1
I F = 10mA
I F = 2mA
I F = 5mA
0.8
0.6
I F = 2mA
I F = 1mA
0.1
0.01
I F = 1mA
I F = 0.5mA
I F = 0.2mA
0.4
0.2
0.0
-40
-20
-20
0
20
40
I F = 0.5mA
I F = 0.2mA
60 100
120
0.001
0.0001
0.1
1
Normalized to:
I F = 5mA
V CE = 5V
T A = 25 ° C
10
T A – AMBIENT TEMPERATURE ( ° C)
Fig. 5 Normalized Collector Base Photocurrent
Ratio vs. Forward Current
100
10
V CE – COLLECTOR-EMITTER VOLTAGE (V)
Fig. 6 Normalized Collector-Base Current
vs. Temperature
I F = 10mA
10
1
1
0.1
I F = 5mA
I F = 1mA
I F = 0.5mA
I F = 2mA
0.1
0.01
0.1
1
10
Normalized to:
I F = 5mA
V CB = 4.3V
T A = 25 ° C
100
0.01 Normalized to:
I F = 5mA
V CB = 4.3V
T A = 25 ° C
0.001
-60 -40 -20
0
I F = 0.2mA
20 40
60
80
100
I F – FORWARD CURRENT (mA)
?1983 Fairchild Semiconductor Corporation
MCT5201M, MCT5210M, MCT5211M Rev. 1.1.3
7
T A – AMBIENT TEMPERATURE ( ° C)
www.fairchildsemi.com
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