PS9121-V-F3-AX

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Optoisolators - Logic Output

The Vishay Siliconix PS9121-V-F3-AX Isolation Optical Logic Output optoisolator is a single-channel optocoupler that is designed for use in industrial logic isolation applications. It has a dielectric isolation voltage rating of 2500 Vrms, and can be used in data transmission, control systems, and factory automation applications. This device is ideal for applications requiring high noise immunity and long life.

Application Field

The PS9121-V-F3-AX optoisolator can be used for the isolation of logic signals for data transmission, control systems, and several types of factory automation such as circularity checking, picking, and positioning. Other application fields include high-voltage AC/DC motor drive control, interlocking control, medical/communications equipment control, industrial computers, and aircraft control systems.

Working Principle

The PS9121-V-F3-AX optoisolator works by using an infrared light-emitting diode (LED) to transmit an input signal across a physical gap or barrier, which creates an isolation between two circuits or systems. The transmitted signal is received by a phototransistor, which amplifies the signal at the output side of the optoisolator. The output can then be used to activate a logic device such as a flip-flop or a timer.

This optoisolator has many features which make it ideal for isolating logic signals. It has an optical current transfer ratio (CTR) of 50%, and a low package Leakage Current Under High Voltage (LCUHV) of 0.1 mA. It also has a maximum propagation delay of 1.6 µs and a symmetrical rise and fall time of 250 ns. In addition, it has a wide operating temperature range of -55 °C to +125 °C, and is available in a 4-pin SOP package.

The PS9121-V-F3-AX optoisolator is highly reliable and has a long operational lifetime since it is constructed without a mechanical contact. The device is also immune to environmental conditions such as moisture, vibration, shock, and temperature cycling, making it suitable for use in harsh industrial environments.

Conclusion

The Vishay Siliconix PS9121-V-F3-AX Isolation Optical Logic Output optoisolator is a reliable device that can be used in a variety of industrial applications where high noise immunity and long life are important. It is easy to use and can provide a level of isolation that is required for data transmission, control systems, and factory automation. Its features and operational characteristics make it an ideal choice for isolating logic signals in demanding applications.

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