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H21LTI Datasheet Optologic Optical Interrupter Switch

Manufacturer: Fairchild (now onsemi)

Overview: OPTOLOGIC® OPTICAL INTERRUPTER SWITCH H21LTB 0.472 (12.0) 0.457 (11.6) C L H21LTI PACKAGE DIMENSIONS Ø 0.133 (3.4) Ø 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 PART NUMBER DEFINITIONS H21LTB H21LTI H21LOB H21LOI Totem-pole, buffer output Totem-pole, inverter output Open-collector, buffer output Open-collector, inverter output 0.125 (3.2) 0.119 (3.0) C L 0.315 (8.0) INPUT/OUTPUT TABLE 0.055 (1.40) 0.045 (1.14) Part 0.110 (2.8) 0.091 (2.3) PIN 1 ANODE PIN 2 CATHODE 0.295 (7.5) 0.272 (6.9) 0.055 (1.40) 0.045 (1.14) Number H21LTB H21LTB H21LTI H21LTI H21LOB H21LOB H21LOI H21LOI LED On Off On Off On Off On Off Output High Low Low High High Low Low High 2 3 4 PIN 3 V CC PIN 4 V O 0.020 (0.51) (SQ) PIN 5 GND 1 5 NOTES: 1. Dimensions for all drawings are in inches (mm). 2. Tolerance of ± .010 (.25) on all non-nominal dimensions unless otherwise specified.

General 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.

Key Features

  • Low cost.
  • 0.035” apertures.
  • Black plastic opaque housing.
  • Mounting tabs on housing.
  • Choice of inverter or buffer output functions.
  • Choice of open-collector or totem-pole output configuration.
  • TTL/CMOS compatible output functions  2001 Fairchild Semiconductor Corporation DS300294 5/29/01 1 OF 8 www. fairchildsemi. com.

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