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4N25 Optocoupler Phototransistor IC DIP-8 Package

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Description

The 4N25 optocoupler consists of an infrared LED and a phototransistor. When the LED is activated by an input signal, it emits infrared light that is detected by the phototransistor, thereby transferring the signal while maintaining electrical isolation between the input and output.

Features

  • Electrical Isolation: Provides electrical isolation between the input and output, protecting sensitive components from high voltages and noise.
  • Phototransistor Output: Includes a phototransistor for signal detection, which can be used to drive logic-level circuits or small loads.
  • Wide Operating Range: Suitable for a range of applications with varying input and output voltage requirements.
  • Compact DIP-8 Package: Available in an 8-pin dual in-line package (DIP-8), which is convenient for breadboards and through-hole mounting on PCBs.
  • Low Current Transfer Ratio: Offers a low current transfer ratio (CTR), making it suitable for low-current signal transmission.

Specifications

  • Input LED Forward Voltage (V_F): Typically 1.2V to 1.4V at a forward current of 20mA.
  • Input LED Forward Current (I_F): Recommended forward current is 20mA.
  • Output Collector-Emitter Voltage (V_CEO): Maximum 50V.
  • Output Collector-Emitter Saturation Voltage (V_CE(sat)): Typically 0.2V at a collector current of 5mA.
  • Output Current (I_C): Maximum collector current is 50mA.
  • Current Transfer Ratio (CTR): Typically between 40% and 600% depending on the input current and temperature.
  • Isolation Voltage: Typically 5kV RMS.

Applications

  • Signal Isolation: Used in circuits to isolate high-voltage or noisy signals from low-voltage control circuits.
  • Switching Power Supplies: Provides isolation in power supply circuits to separate the high-voltage and low-voltage sections.
  • Data Communication: Utilized in data communication systems to isolate and transmit digital signals.
  • Microcontroller Interfacing: Used to interface microcontrollers with high-voltage components or systems, protecting the microcontroller from voltage spikes.

Note

* Product Images are shown for illustrative purposes only and may differ from actual product

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