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Dual High-Speed, Open-Drain
Digital Optical Isolator

The CPC5002 is a dual high speed optical logic isolator with open-drain outputs providing 3750Vrms of galvanic isolation between the inputs and the outputs. Activating the input LED causes the open-drain output to turn on, pulling the voltage of the external pullup resistor towards ground. Utilizing CMOS technology enables the output stage’s high-gain circuitry to operate with a miserly power consumption of <5mW (typical) when operated with a 3.3V supply voltage and a low input LED drive current of 1.5mA.

Because optical isolators pass logic levels directly there is no internal state refresh clock to maintain a non-changing input. Additionally, the CPC5002 will always return the buffered signals to their proper value after a transient interruption at either side.


CPC5002 Functional Block Diagram

Data Sheet for CPC5002 (Rev 4)


  • Dual Optical Isolator
  • Buffers Two Independent Signals
  • Power-Down to Hi-Z Does Not Load Outputs
  • Low Power CMOS Reduces Supply Current
  • Output Operates Over 2.7V < VDD < 5.5V
  • LED Drive Current Only 1.5mA
  • High Speed: 10Mbaud Typical
  • Operates on 2.7V to 5.5V, Enabling Level Translation
  • Single 8-Pin DIP or Surface Mount Package
  • 3750Vrms Galvanic Isolation


  • Test and Measurement
  • A/D and D/A Isolation
  • Power Converter Isolation
  • Medical
  • Ground Loop Elimination
  • I2C Bus Isolation
  • Computer Bus Isolation
  • Isolated Line Receiver



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