PACKAGE DIMENSIONS
DESCRIPTION
The H21L series are slotted optical switches designed for multipurpose non contact sensing. They consist of a GaAs LED and a
silicon OPTOLOGIC
®
. 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 configuration for TTL/CMOS compatibility
H21LTB H21LTI H21LOB H21LOI
NOTES:
1. Dimensions for all drawings are in inches (mm).
2. Tolerance of ± .010 (.25) on all non-nominal dimensions
unless otherwise specified.
OPTOLOGIC
®
OPTICAL
INTERRUPTER SWITCH
FEATURES
• Low cost • Choice of inverter or buffer output functions
• 0.035” apertures • Choice of open-collector or totem-pole output configuration
• Black plastic opaque housing • TTL/CMOS compatible output functions
• Mounting tabs on housing
H21LTB Totem-pole, buffer output
H21LTI Totem-pole, inverter output
H21LOB Open-collector, buffer output
H21LOI Open-collector, inverter output
PART NUMBER DEFINITIONS
Part
LED Output
Number
H21LTB On High
H21LTB Off Low
H21LTI On Low
H21LTI Off High
H21LOB On High
H21LOB Off Low
H21LOI On Low
H21LOI Off High
INPUT/OUTPUT TABLE
2001 Fairchild Semiconductor Corporation
DS300294 5/29/01 1 OF 8 www.fairchildsemi.com
