Dual Channel, High Speed Optocouplers

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The HCPL-0531 dual channel optocoupler contains a pair of light emitting diodes and integrated photodetectors with electrical insulation between input and output.

Separate connection for the photodiode bias and output transistor collectors increase the speed up to a hundred times that of a conventional phototransistor coupler by reducing the base-collector capacitance.

It is available in an industry standard SO-8 package. It is designed for high speed TTL/TTL applications. A standard 16 mA TTL sink current through the input LED will provide enough output current for 1 TTL load and a 5.6 k ohm pull-up resistor. CTR is 19% minimum at IF = 16 mA.



  • High Speed: 1 Mb/s
  • TTL Compatible
  • Available in 8 Pin DIP, SO-8, and 8 Pin DIP - Gull Wing Surface Mount (option 020) Packages
  • High Density Packaging
  • 3 MHz Bandwidth
  • Open Collector Outputs
  • Guaranteed Performance from 0 degrees C to 70 degrees C
  • Safety Approval:
UL Recognized - 3750 V rms for 1 minute (5000 V rms for 1 minute for Option 020) per UL1577
CSA Approved
  • Single Channel Version Available (HCPL-4502/3, HCPL-0452/3)
  • Options available are:
300 = Gull Wing Surface Mount Option
500 = Tape and Reel Packaging Option
XXXE = Lead Free Option


  • Line Receivers - High Common Mode Transient Immunity (>1000 V/ms) and Low Input-Output Capacitance (0.6 pF)
  • High Speed Logic Ground Isolation - TTL/TTL, TTL/LTTL, TTL/CMOS, TTL/LSTTL
  • Replace Pulse Transformers - Save Board Space and Weight
  • Analog Signal Ground Isolation - Integrated Photon Detector Provides Improved Linearity over Phototransistor Type
  • Polarity Sensing
  • Isolated Analog Amplifier - Dual Channel Packaging Enhances Thermal Tracking

Lifecycle Status



  • RoHS
    Pb & Pb-free options available

Lifecycle Status


Substance Compliance

  • RoHS
    Pb & Pb-free options available
Specification Value
Lifecycle Active
RoHS6 Compliant Pb & Pb-free options available
Max Qty of Samples 20
Samples Available Yes
Distrib. Inventory Yes
Product Type 1 MBd Transistor Optocoupler
Package SO8
VDD (V) 5
IF Min. (mA) 16.0
CTR Min. (%) 19.0
CTR Max. (%) 50
Prop Delay (tPLH) Max. (µs) 1.0
Prop Delay (tPHL) Max. (µs) 1.0
CMR (min.) (V/µs) 1000.0
Vcm (V) 10.0
UL Insulation Rating Viso (VRMS) 3750.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 560


Application Brief (1) i
Application Note (5) i
Brochures (2) i
Design Guide (1) i
FAQs (1) i
Obsolescence Notice (1) i
Options Data Sheet (5) i
Product Change Notice (PCN) (16) i
Promotional Material (1) i
Regulatory Certificate (1) i
Reliability Data Sheet (2) i
Selection Guide (2) i
White Papers (3) i