ACPL-074L-000E

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Optoisolators are electronic components comprising of an optical transmitter and a separate physical receiver, which are used to electrically isolate two circuits they join. The ACPL-074L-000E, more commonly referred to as an ACPL-074L, is a type of optoisolator generally classified as a ‘Logic Output’ optoisolator due to its ability to isolate and generate logic levels in response to an external input. This article aims to discuss the application field and working principle of the ACPL-074L.

Application Field

The ACPL-074L is typically used in applications where a logic-level signal is required and it would be beneficial to isolate the output signal from the input signal. This type of optoisolator prevents the output signal from affecting the input, as well as the other way around, enabling longer signal transmission and protecting against voltage spikes and surges.The ACPL-074L is employable in a vast range of electronics related products, including computers and mobile phones. More specifically, it is utilised for data transmission and communication interfaces in order to preserve the signal’s integrity.

Working Principle

The ACPL-074L consists of an optical input coupled with a detector and an output transistor. In its most basic form, the optoisolator operates by using a signal’s electric current to trigger the optical input, which in turn switches on the output device in order to generate the logic level output. The optoisolator frame has several distinct parts. At the top are four leads, with the input side receiving the input signal, and the output side providing the logic level output. The bottom of the frame houses a light-emitting diode (LED) which transmits the optical signal when triggered. Inside is the detector, which is what changes the optical signal into the output in the form of a logic-level. The output built-in transistor is employed to switch the output on when triggered.The electrical current used to trigger the optoisolator is fairly low, meaning that the ACPL-074L is suitable for use in circuits where no significant power is available. The high-voltage breakdown, up to 2800V, also means it is suitable for use in numerous high voltage applications.Overall, the function of the ACPL-074L is to isolate the input and output signals from one another, whilst simultaneously providing the accurate logic output.

Conclusion

The ACPL-074L, an optoisolator generally classified as a ‘Logic Output’ optoisolator, is capable of generating a logic-level signal in response to a light emitting signal. It is widely employed as it is suitable for a vast range of electronics products and is capable of providing reliable signal transmission and isolating the input and output signals. The ACPL-074L is an extremely useful component for both hobbyists and engineers alike.

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