6N137SD

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Optoisolators - Logic Output have been around for many years and are often used to remove electrical noise, create isolated power supplies, protect sensitive circuits, and link data bus systems. The 6N137SD is an example of one such optoisolator with a variety of applications and a working principle that is based on the transfer of light energy. In this article, we will explore the 6N137SD application field and working principle.

Applications

The 6N137SD is a CNL (Coupled-node logic) optoisolator, meaning it has a single channel optocoupler with a low-power, inverted, logic signal output. As such it has many applications in fields such as telecommunications, consumer electronics, industrial automation, energy management, and automotive. With its low off-state current, the 6N137SD can drive loads with as little as 0.2mA and support TTL and CMOS interfaces.

One of the more common applications of the 6N137SD is in telecommunications, where it is often used for isolation between the central office and the user terminal. This isolation helps protect against surges and noise in the signal and provides reliable data transfer between the two components. In consumer electronics, the 6N137SD is used in various sensors, including voltage detectors, temperature controllers, and power controllers.

In industrial automation, the optoisolator can be used to provide safety interlocking between input and output circuits, like detecting the motion of a mechanical arm. In energy management, the 6N137SD can be used to replace mechanical relays in load control applications, such as temperature or lighting control. Finally, the optoisolator can also be used in automotive safety systems, such as detecting and responding to obstacles on the road.

Working Principle

At its core, the 6N137SD optoisolator functions as a light activated switch. It contains an opto-detector which is powered by an external light source. When the light source is on, the opto-detector generates an electrical signal that is fed into an output circuit, activating it. Conversely, when the light source is off, the opto-detector stops generating the signal, causing the output circuit to shut off. The optoisolator is thus able to electricall isolate its input and output circuits, preventing interference between them.

The 6N137SD optoisolator is designed to provide multiple functions in one package. It contains a photo transistor opto-detector, an output driver circuit, and a necessary electronic circuitry to achieve a reliable switching action. The opto-detector section is comprised of a photo transistor optically coupled to an LED source. The LED source is powered by a steady 5V supply, and the photo transistor output voltage is monitored by the output circuit. The output circuit is designed to receive the external logic signal and convert it to the necessary logic level.

In summary, the 6N137SD optoisolator is designed to provide isolation between its input and output circuits. It is able to do this by taking advantage of the transfer of light energy in the form of an electrical signal. With its applications in various fields such as telecommunications, consumer electronics, industrial automation, energy management, and automotive, the 6N137SD optoisolator is a versatile and reliable device that has helped make our lives easier.

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