HCPL-261N-520E

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HCPL-261N-520E Optoisolators - Logic Output Application Field and Working Principle

The ability of the HCPL-261N-520E optoisolator is to provide electrical isolation of logic circuits with very small input current capabilities, making it ideally suited for use in logic output isolation applications.

This optoisolator is based on a GaAs infrared light emitting diode (LED) coupled with a Silicon phototransistor. The optically coupled isolation provides protection against high voltages due to static electricity shocks or other transients, and is suitable for use in systems for logic transfer and control between the primary and secondary side of the system.

The HCPL-261N-520E optoisolator is designed to provide a high degree of electrical isolation between the primary and secondary, and offers the highest isolation available for any optoisolator in its package size.

The optoisolator is a 4-pin device that consists of an LED coupled to a phototransistor. The LED is connected to a DC voltage (2.7 V to 5.5 V) on the primary side, while the base and emitter of the phototransistor are connected to a ground rail on the secondary side. When a feedback signal from the secondary side is received, the LED on the primary side emits a light that is sensed by the phototransistor on the secondary side. The output of the phototransistor is a logic level signal with a voltage range of 0 V - 5 V.

The logic level output of the optoisolator can be used to control other circuits on the primary side, eliminating the need for costly electrical isolation circuitry. The HCPL-261N-520E is suitable for logic control circuits, signal transmission between different voltages, and for providing a proof of signal in hostile environments.

One of the major advantages of the HCPL-261N-520E optoisolator is its low power consumption. The LED has a low forward voltage and current rating, allowing very small signals to be isolated in a small package size. Optoisolators are also very reliable devices, with an isolation capability up to 4000 volts, and relatively low failure rates over a wide operating temperature range (-40°C - 85°C).

Another advantage of the HCPL-261N-520E is its ability to provide very low distortion in the output signal, as compared to conventional optoisolators. This reduces cross-talking and other faulty or erroneous signals. The quality of the signal is maintained through the insulation provided by the device, as it prevents interference between the primary and secondary circuits.

The HCPL-261N-520E optoisolator is easy to use and maintain. It requires no external power to trigger a response, and requires no adjustment to its basic operation. The optoisolator is also flexible, allowing for adjustment of the LED current and the phototransistor current for optimized operation in a variety of applications.

Overall, the HCPL-261N-520E optoisolator is a versatile device, ideal for a broad range of logic output isolation applications. Its small size and low power consumption make it a perfect fit for many of today’s demanding logic control applications.

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