PC81718NIP0X

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Optoisolators are specially designed electronic components that allow transmission of electrical signals between two circuits that are electrically isolated from each other. They are also known as optically isolated semiconductor switches, galvanic isolators or optical couplers and are typically used for protection against electrical noise, spikes or shocks emanating from one circuit to the other. The PC81718NIP0X is a photovoltaic output transistor optoisolator and is used in communication systems, industrial instrumentation, security equipment and automotive control applications, to name a few.

The PC81718NIP0X optoisolator consists of an infrared emitting diode (IRED) and a phototransistor separated by an isolation barrier. The optoisolator operates on the principle of internal photoemission, meaning a current source in the LED side is used to produce electrons which in turn cause electrons in the phototransistor side to be emitted. This electron emission on the phototransistor side creates a current, which is the output of the optoisolator. This current is proportional to the input current and can be used to switch on or off a load depending on the characteristics of the output circuit.

The optoisolator has two input circuits, an LED side and a phototransistor side. The LED side contains an LED, which is driven by providing current from the power source to the optoisolator. The phototransistor side contains the phototransistor and an extra resistor, resistor on the phototransistor side which is used to define the current gain. The LED emits light in the infrared range when a current is applied to it, which is then incident on the phototransistor. The phototransistor absorbs this light and switches ON. When the light intensity increases, the current in the phototransistor increases and this is the output current of the optoisolator.

The PC81718NIP0X optoisolator is designed for wide supply voltage range and it is suitable for controlling circuits ranging from 5.5V to 35V. It has good stability, wide range of temperature and wide viewing angle. This optoisolator can be used in automotive control applications, communication systems, industrial instrumentation and security equipment. It can be used to switch on or off a load depending on the characteristics of the output circuit.

In summary, the PC81718NIP0X is a photovoltaic output transistor optoisolator which is suitable for controlling circuits ranging from 5.5V to 35V. It operates on the principle of internal photoemission, whereby a current source is applied to the LED side and the electrons generated on that side are emitted on the phototransistor side. The PC81718NIP0X has good stability, wide range of temperature and wide viewing angle and is used in automotive control applications, communication systems, industrial instrumentation and security equipment.

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