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4N45 Dataheets PDF



Part Number 4N45
Manufacturers Avago
Logo Avago
Description High Gain Darlington Output Optocouplers
Datasheet 4N45 Datasheet4N45 Datasheet (PDF)

4N45/4N46 High Gain Darlington Output Optocouplers Data Sheet Description The 4N45/46 optocouplers contain a GaAsP light emitting diode optically coupled to a high gain photodetector IC. The excellent performance over temperature results from the inclusion of an integrated emitter-base bypass resistor which shunts photodiode and first stage leakage currents as well as bleeding off excess base drive to ground. External access to the second stage base provides the capability for better noise reje.

  4N45   4N45



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4N45/4N46 High Gain Darlington Output Optocouplers Data Sheet Description The 4N45/46 optocouplers contain a GaAsP light emitting diode optically coupled to a high gain photodetector IC. The excellent performance over temperature results from the inclusion of an integrated emitter-base bypass resistor which shunts photodiode and first stage leakage currents as well as bleeding off excess base drive to ground. External access to the second stage base provides the capability for better noise rejection than a conventional photodarlington detector. An external resistor or capacitor at the base can be added to make a gain-bandwidth or input current threshold adjustment. The base lead can also be used for feedback. The high current transfer ratio at very low input currents permits circuit designs in which adequate margin can be allowed for the effects of optical coupling variations. The 4N46 has a 350% minimum CTR at an input current of only 0.5 mA making it ideal for use in low input curre.


LED43E 4N45 4N46


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