H21A4 Datasheet, PDF (1/4 Pages) QT Optoelectronics – SOLTTED OPTICAL SWITCH

PHOTOTRANSISTOR
OPTICAL INTERRUPTER SWITCH
H21A4 H21A5 H21A6
0.249 (6.35)
0.243 (6.15)
PACKAGE DIMENSIONS
0.972 (24.7)
0.957 (24.3)
0.472 (12.0)
0.457 (11.6)
CL
Ø 0.133 (3.4)
Ø 0.126 (3.2)
(2X)
+
D
E
+
0.755 (19.2)
0.745 (18.9)
CL
0.39 (1.00)
0.34 (0.85)
0.103 (2.60) NOM
0.129 (3.3)
0.119 (3.0)
0.433 (11.0)
0.422 (10.7)
Optical
CL
0.125 (3.2)
0.119 (3.0)
CL
.295 (7.5)
.272 (6.9)
0.315 (8.0)
0.110 (2.8)
0.091 (2.3)
2
3
1
4
PIN 1 ANODE
PIN 2 CATHODE
PIN 3 COLLECTOR
PIN 4 EMITTER
NOTES:
0.020 (0.51) (SQ)
1. Dimensions for all drawings are in inches (mm).
2. Tolerance of ± .010 (.25) on all non-nominal dimensions
unless otherwise specified.
SCHEMATIC
1
4
2
3
DESCRIPTION
The H21A series are gallium arsenide infrared emitting diode coupled with a silicon photodarlington in a plastic housing. The
packaging system is designed to optimize the mechanical resolution, coupling efficiency, ambient light 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 “ON” to an “OFF” state.
FEATURES
• Opaque housing
• Low cost
• .035” apertures
• High I_C(ON)
 2001 Fairchild Semiconductor Corporation
DS300291 6/05/01
1 OF 4
www.fairchildsemi.com