HCPL-261A#300

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Optoisolators are widely used components in electronics that provide electrical noise immunity and transmission of digital signals. The HCPL-261A#300 is part of the optoisolator family of devices from Avago Technologies, and it is specifically designed for general logic output and signal transmission applications. This article will explain the application field and working principle of this microfilm device.

Firstly, the part name, HCPL-261A#300, indicates that it is an optoisolator logic output type with a 300 mA output. The device has an optically coupled LED and a phototransistor, both sealed in a molded housing. For applications where transmission of digital signals is required, the device provides effective electrical noise immunity and can protect equipment from unexpected electrical surges and spikes. It is Most widely used in signal control and automation systems such as automotive systems and industrial automation systems.

The HCPL-261A#300 optoisolator offers a variety of features to enhance its performance. It provides a high common-mode transient immunity in a 8 kV/μs range, a high CMRR of >50 dB, and a high output current of up to 300 mA. It also reduces the effect of high frequency noise due to its wide bandwidth of up to 45 MHz, and it exhibits low power consumption with a quiescent current of 0.1 mA.

In terms of working principle, the HCPL-261A#300 optoisolator consists of an LED (light emitting diode), a phototransistor and a molded housing. The LED is powered by an external electrical current, which causes the device to produce a light that is directed into the phototransistor. The phototransistor then converts the light energy into a corresponding electrical current, which provides the output of the device. The LED and phototransistor are sealed in an 8-pin DIP (dual-in-line package) frame that helps to protect the device from electrical disturbances and unexpected mechanical shocks.

To conclude, the HCPL-261A#300 is a modern optoisolator device from Avago Technologies designed for signal transmission and logic output applications. It has a wide bandwidth, high CMRR, and a high output current of up to 300 mA. The LED and phototransistor are sealed in a rugged package, providing effective electrical noise immunity which helps protect equipment from unexpected electrical surges and spikes. The device is suitable for use in automotive and industrial automation systems.

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