www.fairchildsemi.com 4 OF 9 8/06/01 DS300399
Fig. 2 Normalized CTR vs. Forward Current
Fig. 4 Output Current vs. Output Voltage
Fig. 3 Normalized CTR vs. Ambient Temperature
Fig. 5 Logic High Output Current vs. Ambient Temperature
FORWARD CURRENT - I
F
(mA)
1 10 100
NORMALIZED CURRENT TRANSFER RATIO - CTR
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
AMBIENT TEMPERATURE - TA (
˚
C)
-50 -25 0 25 50 75 100 125
NORMALIZED CURRENT TRANSFER RATIO
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
V
O
= 5V
V
CC
= 4.5V
T
A
= 25˚C
V
O
= 5V
V
O
= 0.4V
Normalized to I
F
= 16mA
I
F
= 16mA
V
CC
= 4.5V
V
O
= 0.4V
Normalized to T
A
= 25˚C
OUTPUT VOLTAGE - V
o
(V)
024681012
OUTPUT CURRENT - Io (mA)
0
2
4
6
8
10
12
14
16
5 mA
10 mA
20 mA
15 mA
25 mA
30 mA
35 mA
= 40 mA
V
CC
= 15V
T
A
= 25˚C
I
F
AMBIENT TEMPERATURE - T
A
(
˚
C)
-50 -25 0 25 50 75 100 125
LOGIC HIGH OUTPUT CURRENT - I
OH
(µA)
0.001
0.01
0.1
1
10
100
V
CC
= V = 15V
V
CC
= V
O
O
= 5.5V
Fig. 1 LED Forward Current vs. Forward Voltage
FORWARD VOLTAGE - VF (V)
1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
FORWARD CURRENT - IF (mA)
0.001
0.01
0.1
1
10
100
T
A
= 25
˚
C
8-PIN WIDE BODY, HIGH-SPEED
OPTOCOUPLERS
CNW135 CNW136 CNW4502
