Datasheet

5/7/03
Page 9 of 15
© 2003 Fairchild Semiconductor Corporation
GENERAL PURPOSE 6-PIN
PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N26 4N27 4N28 4N35 4N36
4N37 H11A1 H11A2 H11A3 H11A4 H11A5
Fig. 19 Dark Current vs. Ambient Temperature
T
A
- AMBIENT TEMPERATURE (°C)
0 20406080100
I
CEO
- C
O
L
L
E
C
T
O
R
-E
M
IT
T
E
R
D
A
R
K
C
U
R
R
E
N
T
(n
A
)
0.001
0.01
0.1
1
10
100
1000
10000
V
CE
= 10 V
T
A
= 25° C
OUTPUT PULSE
INPUT PULSE
TEST CIRCUIT WAVE FORMS
t
r
t
f
INPUT
I
F
R
L
R
BE
V
CC
= 10V
OUTPUT
t
on
10%
90%
t
off
Figure 20. Switching Time Test Circuit and Waveforms
I
C
Adjust
I
F to produce
I
C = 2 mA