6N138M Isolators

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Optoisolators are electronic devices used to provide isolation between two circuits, usually between the input/output circuits of a microcontroller or computer. The 6N138M is a type of optoisolator, specifically a transistor-photovoltaic optoisolator with an output transistor. This article will discuss the 6N138M’s application field and its working principle.

Application Field

The 6N138M is used in many different fields due to its versatile 3-pin package and high-speed switching characteristics. It is used for signal transmission of microcontrollers and other small I/O devices with short response times. It is also used as a switch for larger I/O systems or in high-voltage electric motors and other such devices. The 6N138M can be used for on/off switching in lighting control circuits and audio amplification circuits. Additionally, its ability to communicate without direct contact makes it useful for audio/visual applications and industrial instrumentation.

Working Principle

The 6N138M consists of an infrared LED, a photo-transistor, and an output transistor. The LED emits an infrared light when activated by an electric current, which is then received by the photo-transistor. The photo-transistor then sends a signal to the output transistor, which amplifies the signal and allows current to flow. This output can then be used to control the rest of the circuit, depending on the application.

It is important to note that since the 6N138M is a transistor output optoisolator, it can handle much higher current than other optoisolators. This allows it to be used in heavier load applications, such as electric motors and other high-current devices. Additionally, the high speed of the 6N138M allows it to be used for applications with fast response times.

Conclusion

The 6N138M is a versatile transistor-photovoltaic optoisolator with an output transistor. It is used in many different fields, including audio/visual applications, industrial instrumentation, microcontrollers, lighting control circuits, electric motors, and other such devices. Its ability to handle higher current load and its quick response time make it a valuable addition to any circuit. With its versatile 3-pin package, the 6N138M has multiple applications and is an ideal choice for any circuit requiring isolation and signal transmission.The specific data is subject to PDF, and the above content is for reference