H21A1 / H21A2 / H21A3
PHOTOTRANSISTOR
OPTICAL INTERRUPTER SWITCH
PACKAGE DIMENSIONS
0.972 (24.7)
0.957 (24.3)
0.472 (12.0)
0.457 (11.6)
C
L
0.249 (6.35)
0.243 (6.15)
+
E
D
+
DESCRIPTION
The H21A1, H21A2 and H21A3 consist of a
gallium arsenide infrared emitting diode
coupled with a silicon phototransistor in a
plastic housing. The packaging system is
designed to optimize the mechanical
resolution, coupling efficiency, ambient light
脴 0.133 (3.4)
脴 0.126 (3.2)
(2X)
C
L
0.39 (1.00)
0.34 (0.85)
0.755 (19.2)
0.745 (18.9)
.073 (1.85)
.133 (3.38)
0.129 (3.3)
0.119 (3.0)
Optical
C
L
rejection, cost and reliability. The gap in the
housing provides a means of interrupting the
signal with an opaque material, switching the
output from an 鈥淥N鈥?to an 鈥淥FF鈥?state.
0.433 (11.0)
0.422 (10.7)
SCHEMATIC
1
4
0.125 (3.2)
0.119 (3.0)
C
L
.295 (7.5)
.272 (6.9)
0.315 (8.0)
FEATURES
0.110 (2.8)
0.091 (2.3)
鈥?Opaque housing
鈥?Low cost
鈥?.035鈥?apertures
鈥?High I
C(ON)
1. Derate power dissipation linearly 1.33 mW/擄C above 25擄C.
2. RMA flux is recommended.
3. Methanol or isopropyl alcohols are recommended as cleaning
agents.
4. Soldering iron tip
1/16鈥?/div>
(1.6mm) minimum from housing.
2
3
2
1
3
4
PIN 1 ANODE
PIN 2 CATHODE
PIN 3 COLLECTOR
PIN 4 EMITTER
0.020 (0.51) (SQ)
NOTES:
1. Dimensions for all drawings are in inches (mm).
2. Tolerance of 鹵 .010 (.25) on all non-nominal dimensions
unless otherwise specified.
ABSOLUTE MAXIMUM RATINGS
Parameter
Operating Temperature
Storage Temperature
Soldering Temperature (Iron)
(2,3 and 4)
Soldering Temperature (Flow)
(2 and 3)
INPUT (EMITTER)
Continuous Forward Current
Reverse Voltage
Power Dissipation
(1)
OUTPUT (SENSOR)
Collector to Emitter Voltage
Emitter to Collector Voltage
Collector Current
Power Dissipation (T
C
= 25擄C)
(1)
(T
A
= 25擄C unless otherwise specified)
Symbol
T
OPR
T
STG
T
SOL-I
T
SOL-F
I
F
V
R
P
D
V
CEO
V
ECO
I
C
P
D
Rating
-55 to +100
-55 to +100
240 for 5 sec
260 for 10 sec
50
6
100
30
4.5
20
150
Unit
擄C
擄C
擄C
擄C
mA
V
mW
V
V
mA
mW
錚?/div>
2001 Fairchild Semiconductor Corporation
DS300290
5/02/01
1 OF 5
www.fairchildsemi.com
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