Dual Channel, High Speed Logic Interface Optocoupler

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The HCPL-2533 is a dual channel optocoupler which is specified for use in LSTTL-to-LSTTL and TTL-to-LSTTL logic interfaces.

A nominal 8 mA LSTTL sink current through the input LED will provide enough output current for proper operation of 1 LSTTL gate under worst-case conditions when used in the recommended circuits. The CTR of the HCPL-2533 is 15% minimum at IF = 8 mA.

The HCPL-2533 contains a pair of light emitting diodes and integrated photon detectors with a 3000 Vdc withstand test between input and output. Separate connection for the photodiode bias and output transistor collector reduce the base-collector capacitance, giving improved speed compared with conventional phototransistor couplers.


  • Data rates to 250 kb/s NRZ
  • LSTTL Compatible
  • High common mode transient immunity: >1000 V/µs
  • High density packaging
  • Open Collector Outputs
  • Guaranteed Performance from temperature: 0oC to 70oC
  • Safety Approval:
    - UL Recognized - 3750 V rms for 1 minute (5000 Vrms for 1 minute for Option 020) per UL1577.
    - IEC/EN/DIN EN 60747-5-2 Approved:
               Viorm = 630 Vpeak for option 060
  • Options available are:
    020 = UL 5000 Vrms/1 Minute Option
    300 = Gull Wing Surface Mount Option
    500 = Tape and Reel Packaging Option
    XXXE = RoHS Compliant Option


  • High speed logic ground isolation - LSTTL-to-LSTTL and TTL-to-LSTTL
  • High voltage isolation
  • Analog signal ground isolation

Lifecycle Status


Substance Compliance

  • RoHS
    Pb & Pb-free options available
Specification Value
Lifecycle Active
RoHS6 Compliant Pb & Pb-free options available
Distrib. Inventory Yes
Product Type 1 MBd Transistor Optocoupler
Package 300mil DIP
VDD (V) 5
IF Min. (mA) 16.0
CTR Min. (%) 15.0
CTR Max. (%) N.A.
Prop Delay (tPLH) Max. (µs) 2.5
Prop Delay (tPHL) Max. (µs) 1.5
CMR (min.) (V/µs) 1000.0
Vcm (V) 10.0
UL Insulation Rating Viso (VRMS) 3750.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 630
Application Brief1 i
Application Note3 i
Brochures1 i
Data Sheet1 i
Design Guide1 i
Options Data Sheet6 i
Product Change Notice (PCN)4 i
Promotional Material2 i
Regulatory Certificate1 i
Reliability Data Sheet1 i
Selection Guide2 i
White Papers2 i
FAQs1 i