PS9817-2-A

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Optoisolators are a type of electrical isolation device that use a photovoltaic or light-emitting diode (LED) to optically couple two different circuits. They are used to separate two circuits while preserving transmitted signal integrity and protecting both circuits from voltage surges, short circuits and other dangerous, or destructive, conditions. The PS9817-2-A is a type of optocoupler, which is a type of optoisolator. This device has a logic output, meaning that it will turn on and off in response to the input (transmitted) signal.

The PS9817-2-A device has a number of specific features that make it a suitable solution for applications such as circuit isolation, data line protection, digital Isolation, load Switching, and noise suppression. These features include a 3 kV isolation voltage rating, 5 kV transient voltage surge rating, 4 MHz switching frequency, digital signal isolation, 500 ns response time, 1.2 mA current transfer ratio, 2 mA output current capability, and circular 0.05" pinout. The device also has a CMTI (Common Mode Transient Immunity) > 200 V/µs.

The device functions by essentially creating two separate circuits within one device, typically referred to as input and output circuits. The input and output circuits are optically connected or coupled together via an LED and a detector inside the device. An incoming electrical signal is received in the input circuit, which then causes the optoisolator\'s LED to emit light which is then detected by the detector. The detector produces an electrical signal in the output circuit which is equivalent to the original signal received by the input circuit, thus preserving the original signal\'s integrity.

The signal that is received by the input circuit can be from any source, such as a switch, relay, or any other circuitry. An example of how a PS9817-2-A device may be used is for the Isolation of a high voltage circuit. Under such conditions, the use of a PS9817-2-A device can ensure that any hazardous voltages present in the high voltage circuit are not transferred to any connected circuitry or components.

The PS9817-2-A can also be used to suppress the propagation of electrical noises from one part of the circuit to another. This is achieved by inserting the PS9817-2-A device in the signal path between the two parts of the circuit. By doing so, any electrical noises within the signal will be optically isolated and will not be transferred to any connected circuitry or components.

In summary, the PS9817-2-A is a type of optoisolator device with a logic output. It has a number of features, such as a 3 kV isolation voltage rating, 5 kV transient voltage surge rating, 500 ns response time, and a CMTI > 200 V/µs among others, that make it suitable for applications such as circuit isolation, data line protection, digital isolation, load switching, and noise suppression. The device works by optically connecting (coupling) two separate electrical circuits, the input and output circuits, within one device. By doing so, it ensures that any hazardous voltages and electrical noises present in one circuit are not transferred to the other, thus preserving the integrity of the original signal.

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