High Gain Darlington Output Optocouplers

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It contains 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.

It has a 250% minimum CTR at 1.0 mA input current and a 7 V minimum breakdown voltage rating.

Selection for lower input current down to 250 mA is available upon request.


  • High Current Transfer Ratio 1500% Typical
  • Low Input Current Requirement - 0.5 mA
  • Performance Guaranteed over 0 degrees C to 70 degrees C Temperature Range
  • Internal Base-Emitter Resistor Minimizes Output Leakage
  • Gain-Bandwidth Adjustment Pin
  • Safety Approval:
UL Recognized 3750 Vrms for 1 Minute
CSA Approved
IEC/EN/DIN EN 60747-5-2
  • Options available are:
060 = IEC/EN/DIN EN 60747-5-2
300 = Gull Wing Surface Mount Lead Option
500 = Tape/Reel Package Option (1 K min)
XXXE = Lead Free Option


  • Telephone Ring Detector
  • Digital Logic Ground Isolation
  • Low Input Current Line Receiver
  • Line Voltage Status Indicator-Low Input Power Dissipation
  • Logic to Reed Relay Interface
  • Level Shifting
  • Interface Between Logic Families

Lifecycle Status


Substance Compliance

  • RoHS
    Pb & Pb-free options available
Specification Value
Lifecycle Active
Distrib. Inventory Yes
RoHS6 Compliant Pb & Pb-free options available
Product Type 100 KBd Darlington Transistor Output
Package 300mil DIP-6
VDD (V) 5
IF Min. (mA) 0.5
CTR Min. (%) 200.0
CTR Max. (%) 1000
Prop Delay (tPLH) Max. (µs) 500.0
Prop Delay (tPHL) Max. (µs) 50.0
CMR (min.) (V/µs) 500.0
Vcm (V) 10.0
UL Insulation Rating Viso (VRMS) 3750.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 630
Application Brief1 i
Application Note5 i
Brochures1 i
FAQs2 i
Obsolescence Notice1 i
Options Data Sheet6 i
Product Change Notice (PCN)18 i
Regulatory Certificate3 i
Selection Guide1 i
White Papers3 i
Promotional Material1 i