H21LOI

H21LOI Datasheet


H21LTB

Part Datasheet
H21LOI H21LOI H21LOI (pdf)
Related Parts Information
H21LTB H21LTB H21LTB
H21LOB H21LOB H21LOB
H21LTI H21LTI H21LTI
PDF Datasheet Preview
OPTICAL INTERRUPTER SWITCH

H21LTB

H21LTI

H21LOB

H21LOI

PACKAGE DIMENSIONS
Ø Ø

Optical CL

PIN 1 ANODE PIN 2 CATHODE PIN 3 VCC PIN 4 VO PIN 5 GND

NOTES Dimensions for all drawings are in inches mm . Tolerance of ± on all non-nominal dimensions unless
otherwise
• Low cost
• apertures
• Black plastic opaque housing
• Mounting tabs on housing
• Choice of inverter or buffer output functions
• Choice of open-collector or totem-pole output
• TTL/CMOS compatible output functions

The H21L series are slotted optical switches designed for multipurpose non contact sensing. They consist of a GaAs LED and a silicon sensor packaged in an injection molded housing and facing each other across a mm gap. The output is either inverting or non-inverting, with a choice of totem-pole or open-collector for TTL/CMOS compatibility
2004 Fairchild Semiconductor Corporation

Page 1 of 9
11/2/04

H21LTB

H21LTI

Part Number Definitions

H21LTB H21LTI H21LOB H21LOI

Totem-pole, buffer output Totem-pole, inverter output Open-collector, buffer output Open-collector, inverter output

OPTICAL INTERRUPTER SWITCH

H21LOB

H21LOI

Input/Output Table

H21LTB H21LTI H21LOB H21LOI

On Off On Off On Off On Off

Output

High Low High Low High
2004 Fairchild Semiconductor Corporation

Page 2 of 9
11/2/04

H21LTB

Schematics

ANODE 1

CATHODE 2 ANODE 1

CATHODE 2

H21LTI

VOLTAGE REGULATOR LA

VOLTAGE REGULATOR LA
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Datasheet ID: H21LOI 633878