H21B1 Datasheet (Fairchild Semiconductor) - PHOTODARLINGTON OPTICAL INTERRUPTER SWITCH

H21B1, PHOTODARLINGTON OPTICAL INTERRUPTER SWITCH

The H21B1, H21B2 and H21B3 consist of a 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 hous

PHOTODARLINGTON OPTICAL INTERRUPTER SWITCH H21B1 PACKAGE DIMENSIONS 0.972 (24.7) 0.957 (24.3) H21B2 H21B3 0.472 (12.0) 0.457 (11.6) C L Ø 0.133 (3.4) Ø 0.126 (3.2) (2X) 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) C L .295 (7.5) .272 (6.9) 0.315 (8.0) SCHEMATIC 0.110 (2.8) 0.091 (2.3) 2 1 3 4 PIN 1 ANODE PIN 2 CATHODE PIN 3 COLLECTOR PI

H21B1 Features

* Opaque housing

* Low cost

* .035" apertures

* High IC(ON) © 2002 Fairchild Semiconductor Corporation Page 1 of 6 6/13/02 PHOTODARLINGTON OPTICAL INTERRUPTER SWITCH H21B1 H21B2 H21B3 ABSOLUTE MAXIMUM RATINGS (TA = 25°C unless otherwise speciﬁed) Parameter Operat