H21A Fairchild Semiconductor, H21A Datasheet - Page 4

• Manufacturer Part Number: H21A
• Description: PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH
• Manufacturer: Fairchild Semiconductor

www.fairchildsemi.com
1.5
.45
4.5
.9
.7
.8
.6
.5
1
4
3
2
1K
PW = 300 s
PRR = 100 pps
I
NORMALIZED TO
R
F
L
=
= 2.5 K
75
R
L
Figure 5. Switching Speed vs. R
AMPS, V
2K
R
CC
L
, LOAD RESISTANCE ( )
= 5V
10
10
10
0.1
1
3
2
1
25
3K
V
CE
T
I
F
A
4K
, AMBIENT TEMPERATURE ( C)
= 25 V
50
DETECTOR
5K
NORMALIZED TO
V
t
on
CE
T
Figure 4. Leakage Current vs. Temperature
A
6K
L
= 25 V
= 25 C
7K 8K 9K 10K
R
75
V
L
CE
t
V
off
CC
= 10 V
+
OPTICAL INTERRUPTER SWITCH
4 OF 5
100
H21A1 / H21A2 / H21A3
.0001
.001
1.00
.01
10
10
10
0.1
.1
1
3
2
1
0
25
T
+
E
A
, AMBIENT TEMPERATURE ( C)
BLACK
SHIELD
D
+
78.7
50
Figure 6. Output Current vs. Distance
2
d
o
EMITTER
PHOTOTRANSISTOR
NORMALIZED TO
V
T
R
A
= 5 V
= 25 C
75
157.5
d, DISTANCE (mils)
4
d, DISTANCE (mm)
100
236.2
6
5/02/01
315
NORMALIZED
TO VALUE WITH
SHIELD
REMOVED
8
DS300290
BLACK
SHIELD
d
o
393.7
10