6N137W

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Optoisolators provide electrical isolation between two circuits using light as transmission media. The 6N137 is an optically isolated logic gate output optoisolator device. Initially introduced by Fairchild Semiconductor in 1980, this device is still widely used today due to its impressive performance and durability. This article explores the application field and working principle of 6N137.

Application Field

The 6N137 optoisolator has multiple applications, such as digital logic signals, data acquisition systems, and analog signal transmission. It is an ideal choice for signal isolation, so it is often used to isolate sensitive analog signals from noisy digital switching devices, or to isolate two circuits carrying different potentials. Furthermore, 6N137 optoisolators can support efficient protection against electric over-voltage or surge, reducing the risk of circuit malfunction and even electrical fire. Other than signal isolation, the 6N137 optoisolator can also be used as a logic buffer, allowing switching signals to be sent over longer distances.

Working Principle

The 6N137 optoisolator consists of an emitter, a photosensitive element, and an output IC. When a voltage is applied to the emitter circuit, it produces a light beam that is proportional to the applied voltage. The photosensitive element, located close to the emitter, transforms this light into an electrical signal. This electric signal is then amplified and sent to the output IC. The output IC is then responsible for producing the necessary electrical output signal.

The 6N137 has a wide optical isolation range of up to 3500 Vrms and a propagation delay of about 10 ns. This makes the device suitable for applications requiring high speed, high accuracy, and high reliability. Additionally, the device can be interfaced with both CMOS and TTL logic systems.

In summary, the 6N137 optoisolator plays an important role in signal isolation in a variety of applications. The device is capable of working in high speed, high accuracy and high reliability. Moreover, the 6N137 optoisolator is also capable of interfacing with both CMOS and TTL logic systems. As such, it is one of the most reliable and powerful optoisolators available today.

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