PC4N290YSZX

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Optoisolators are a family of semiconductor devices which provide galvanic isolation between two electrical circuits or networks. A type of optically-coupled phototransistor, PC4N290YSZX is designed to transmit signals between digital, analog, and optically isolated signals. When optically coupled to a photodiode or other light-driven device, it provides an isolated output current limited to 1.5mA DC. This type of distance-dependent optocoupler is widely used in communication systems, microcontrollers, and other circuits requiring isolation between a decoder and a driver, between logic circuits, and between a power supply and a ground.

The PC4N290YSZX application field covers various types of circuits: special communication systems, microcontroller power supply systems, circuit protection and isolation relays/drivers, security systems, voltage and current measurement systems, audio and digitization circuits, as well as signal filters.

The working principle of the PC4N290YSZX can be subdivided into two parts: the input, and the output. The input is made up of a series of three pins arranged in an open-collector condition. A photo source, such as an LED or laser diode, is connected between the first pin and a supply voltage source (or other reference) to couple the light source to the device. The second pin is connected to the ground to provide an electrical sink for the current of the light source. The third pin is connected to an electrical signal source that will modulate the intensity of the light being emitted from the light source. This modulation will cause the current in the LED to change according to the signal.

The output of the PC4N290YSZX is a high voltage, optically-driven transistor. When light enters the device, it is converted into an electrical current which is then used to switch the transistor on or off. With the current provided from the LED, the transistor will either be open or closed, depending on the input voltage at the base of the transistor. This action will provide a path for current to flow through, thus providing an isolated output current limited to 1.5mA DC.

Due to their superior electrical and optical isolation, PC4N290YSZX optoisolators can be used in a wide range of applications. In addition, they provide a high level of protection from electrical noise, voltage spikes, and other conditions that can degrade system performance or cause damage to sensitive components. Thanks to the use of innovative materials, components, and designs, opto-couplers like the PC4N290YSZX represent a reliable and cost-effective solution for meeting the needs of a wide variety of applications.

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