HCPL-817-50BE

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Optoisolators are used in various industries for a variety of applications. The HCPL-817-50BE is one such optoisolator designed to provide two independent channels of isolated input/output control. The device is used in communication and control applications, including isolated RS232 and RS485 data transfer and communication, as well as processing of logic signals.

The HCPL-817-50BE is classified as a transistor-photovoltaic output optoisolator. It is an 8-pin, 2-channel device in a DIP package. The optoisolator provides a controlled, low current-switching signal to the output transistor. The optocoupler utilizes a photovoltaic-type output stage to indefinitely maintain its state while the input signal remains active. This makes the optoisolator suitable for use in overloads or short-circuit protection circuits.

The HCPL-817-50BE relies on a series circuit to produce the photovoltaic voltage at its output. The series circuit consists of the light-emitting diode (LED), the transistor, the photovoltaic cell, and a reverse-biased diode. When a voltage is applied to the LED, it produces light, which is reflected onto the surface of the photovoltaic cell. The light photons enter the cells, causing a voltage to be generated across the cell. The voltage must then pass through the reverse-biased diode, which acts as a current limiting device.

Once the voltage reaches the transistor, a current is sent to the optoisolator’s output, thus isolating the input and output signals. The HCPL-817-50BE is also designed to limit the effect of any sudden changes in the LED’s forward voltage or current. This feature helps to protect the device from electrical noise or interfering signals that may be present in the environment.

The HCPL-817-50BE optoisolator is a versatile device that can be used for varied applications. It provides a reliable channel of input/output control between two isolated circuits, and its photovoltaic output stage helps ensure accurate and consistent operation. The device’s ability to limit the effects of electrical noise makes it suitable for use in many types of logic and communication applications.

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