OPTOLOGIC
廬
OPTICAL
INTERRUPTER SWITCH
H21LTB
H21LTI
PACKAGE DIMENSIONS
0.972 (24.7)
0.957 (24.3)
0.472 (12.0)
0.457 (11.6)
C
L
脴 0.133 (3.4)
脴 0.126 (3.2)
(2X)
H21LOB
H21LOI
0.249 (6.35)
0.243 (6.15)
+
E
D
+
C
L
0.39 (1.00)
0.34 (0.85)
0.755 (19.2)
0.745 (18.9)
0.129 (3.3)
0.119 (3.0)
0.103 (2.60) NOM
0.433 (11.0)
0.422 (10.7)
Optical
C
L
0.125 (3.2)
0.119 (3.0)
0.250 (6.36)
0.216 (5.50)
0.350 (8.9)
0.330 (8.4)
C
L
0.315 (8.0)
0.350 (8.9)
0.330 (8.4)
0.055 (1.40)
0.045 (1.14)
0.055 (1.40)
0.045 (1.14)
0.110 (2.8)
0.091 (2.3)
PIN 1 ANODE
PIN 2 CATHODE
PIN 3 V
CC
PIN 4 V
O
Features
鈥?Low cost
鈥?0.035" apertures
鈥?Black plastic opaque housing
鈥?Mounting tabs on housing
鈥?Choice of inverter or buffer output functions
鈥?Choice of open-collector or totem-pole output
con鏗乬uration
鈥?TTL/CMOS compatible output functions
2
1
3
4
5
0.020 (0.51) (SQ)
PIN 5 GND
NOTES:
1. Dimensions for all drawings are in inches (mm).
2. Tolerance of 鹵 .010 (.25) on all non-nominal dimensions unless
otherwise speci鏗乪d.
Description
The H21L series are slotted optical switches designed for multipurpose non contact sensing. They consist of a GaAs LED and a
silicon OPTOLOGIC
廬
sensor packaged in an injection molded housing and facing each other across a .124" (3.15 mm) gap. The
output is either inverting or non-inverting, with a choice of totem-pole or open-collector con鏗乬uration for TTL/CMOS compatibility
漏 2004 Fairchild Semiconductor Corporation
Page 1 of 9
11/2/04