HCPL-061A#500

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The HCPL-061A#500 is an opto-isolator device used in electronic circuit applications. It consists of two related parts, an LED and a phototransistor. The LED is a gallium arsenide infrared emitter and the phototransistor is typically a poly-silicon fractional-micron phototransistor. The device features a wide operating temperature range of -40°C to +85°C.

The HCPL-061A#500 is categorised into the \'Logic Output\' family of opto-isolators since its output is a logic-level signal. Like all opto-isolator logic-level outputs, it provides electrical isolation between the input and output circuits. This allows the input and output stages of the circuit to be operated at different voltages and can prevent electrical transients and noise on the input from propagating to the output.

The HCPL-061A#500 is most often used in TTL and CMOS applications, such as digital logic gates and flip-flops. It is also frequently used for simple light-sensor applications. In TTL applications the HCPL-061A#500 has a maximum current drive of 8mA allowing it to interface smoothly with input logic levels. Additionally, the product is designed with a logic high output when the input current exceeds a typically set value of 2mA.

The working principle of the HCPL-061A#500 is fairly simple. When the input LED is energized by a current the signal is transferred to the phototransistor, resulting in an optical switch. This switch effectively turns the output on when the input LED is illuminated and turns it off when it is not. The HCPL-061A#500 provides a degree of electrical isolation guaranteed by its optically coupled nature, as well as excellent noise immunity.

The HCPL-061A#500 opto-isolator from Avago Technologies is an excellent choice for TTL and CMOS applications and light-sensor applications. The device offers excellent electrical isolation between input and output circuits, wide operating temperature range, 8mA maximum current drive and a logic-level output. The device is relatively simple to use and is available in small surface-mount packages.

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