Datasheet

5/7/03
4N25 4N26 4N27 4N28 4N35 4N36
4N37 H11A1 H11A2 H11A3 H11A4 H11A5
GENERAL PURPOSE 6-PIN
PHOTOTRANSISTOR OPTOCOUPLERS
Page 8 of 15
© 2003 Fairchild Semiconductor Corporation
N
O
R
M
A
L
IZ
E
D
t
on
- (t
on(R
BE
)
/ t
on(open)
)
N
O
R
M
A
L
IZ
E
D
t
on
- (t
on(R
BE
)
/ t
on(open)
)
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Fig. 15 Normalized t
on
vs. R
BE
(Black Package)
Fig. 16 Normalized t
on
vs. R
BE
(White Package)
R
BE
- BASE RESISTANCE (k Ω) R
BE
- BASE RESISTANCE (k Ω)
10 100 1000 10000 100000
10 100 1000 10000 100000
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
V
CC =
10 V
I
C
= 2 mA
R
L
= 100 Ω
V
CC =
10 V
I
C
= 2 mA
R
L
= 100 Ω
S
W
IT
C
H
IN
G
S
P
E
E
D
- (
µ
s
)
Fig. 14 Switching Speed vs. Load Resistor
(White Package)
R-LOAD RESISTOR (kΩ)
0.1 1 10 100
0.1
1
10
100
1000
T
off
I
F
= 10 mA
V
CC
= 10 V
T
A
= 25°C
T
r
T
on
T
f
Fig. 13 Switching Speed vs. Load Resistor
(Black Package)
R-LOAD RESISTOR (kΩ)
0.1 1 10 100
S
W
IT
C
H
IN
G
S
P
E
E
D
- (
µ
s
)
0.1
1
10
100
1000
T
off
I
F
= 10 mA
V
CC
= 10 V
T
A
= 25°C
T
r
T
on
T
f
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
V
CC =
10 V
I
C
= 2 mA
R
L
= 100 Ω
V
CC =
10 V
I
C
= 2 mA
R
L
= 100 Ω
N
O
R
M
A
L
IZ
E
D
t
off
- (t
off(R
BE
)
/ t
off(open)
)
N
O
R
M
A
L
IZ
E
D
t
off
- (t
off(R
BE
)
/ t
off(open)
)
Fig. 17 Normalized t
off
vs. R
BE
(Black Package)
10 100 1000 10000 100000
R
BE
- BASE RESISTANCE (k Ω)
10 100 1000 10000 100000
R
BE
- BASE RESISTANCE (k Ω)
Fig. 18 Normalized t
off
vs. R
BE
(White Package)