H21B1 Fairchild Optoelectronics Group, H21B1 Datasheet

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... DESCRIPTION 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 housing provides a means of interrupting the signal with an opaque material, switching the output from an “ ...

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... Derate power dissipation linearly 1.67 mW/°C above 25°C. 2. RMA flux is recommended. 3. Methanol or isopropyl alcohols are recommended as cleaning agents. 4. Soldering iron 1/16" (1.6 mm) minimum from housing. © 2002 Fairchild Semiconductor Corporation PHOTODARLINGTON OPTICAL INTERRUPTER SWITCH H21B1 (T = 25°C unless otherwise specified) A Symbol T OPR ...

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... H21B2 5.0 — — H21B3 10 — — H21B1 7.5 — — H21B2 14 — — H21B3 25 — — All — — 1.0 H21B1/2 — — 1.5 All — 45 — All — 7 — All — 250 — All — 45 — UNITS V V µA ...

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... Fairchild Semiconductor Corporation OPTICAL INTERRUPTER SWITCH H21B1 Figure 1. Output Current vs. Input Current 100 NORMALIZED 1 PULSED = 100 µsec PRR = 100 pps .1 .08 .06 .04 . 100 I , INPUT CURRENT (mA) F Figure 2. Output Current vs. Temperature 100 NORMALIZED ° 1 mA INPUT PULSED I = 100 0.1 -50 -25 ...

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... T , AMBIENT TEMPERATURE (°C) A Figure 5. Switching Speed vs 300 µs PRR = 100 pps 1 7 AMPS NORMALIZED TO = 750 Ω 0 100 LOAD RESISTANCE (Ω) L © 2002 Fairchild Semiconductor Corporation OPTICAL INTERRUPTER SWITCH H21B1 Figure 4. Leakage Current vs. Temperature DETECTOR ° 0 100 off .01 .001 t on ...

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... Fairchild Semiconductor Corporation PHOTODARLINGTON OPTICAL INTERRUPTER SWITCH H21B1 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness. ...