Typical Performance Curves
Fig. 2 Normalized CTR vs. Forward Current
Fig. 1 LED Forward Voltage vs. Forward Current
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
V
T
= 5.0V
= 25°C
Normalized to
= 10 mA
CE
I
A
F
T
T
T
= -55°C
= 25°C
= 100°C
A
A
A
1
10
100
0
2
4
6
8
10
12
14
16
18
20
I
- LED FORWARD CURRENT (mA)
I - FORWARD CURRENT (mA)
F
F
Fig. 4 CTR vs. RBE (Unsaturated)
Fig. 3 Normalized CTR vs. Ambient Temperature
1.4
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
I
= 20 mA
F
1.2
1.0
0.8
0.6
0.4
0.2
I
= 5 mA
F
I
= 10 mA
F
I
= 5 mA
F
I
= 10 mA
F
I
= 20 mA
F
V
CE
= 5.0 V
Normalized to
= 10 mA
I
F
T
= 25°C
A
-60
-40
-20
0
20
40
60
80
100
10
100
1000
R
BE
- BASE RESISTANCE (kΩ)
T
- AMBIENT TEMPERATURE (°C)
A
Fig. 6 Collector-Emitter Saturation Voltage
vs. Collector Current
Fig. 5 CTR vs. RBE (Saturated)
100
10
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
T
= 25˚C
A
V
CE
= 0.3 V
I
= 20 mA
F
1
I
= 10 mA
F
I
= 2.5 mA
F
0.1
I
= 5 mA
F
I
= 20 mA
F
0.01
I
= 10 mA
I
= 5 mA
F
F
0.001
10
100
1000
0.01
0.1
1
10
R - BASE RESISTANCE (k Ω)
BE
I
- COLLECTOR CURRENT (mA)
C
©2005 Fairchild Semiconductor Corporation
4NXXM, H11AXM Rev. 1.0.2
www.fairchildsemi.com
4
ROCHESTER [ Rochester Electronics ]
