HMHA2801AR4

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Optoisolators are components that optically isolate one electrical circuit from another by feeding the signal through a one-to-one optical pathway. Generally, an optoisolator is composed of a light source (usually an LED) and a light-sensitive detector (usually a phototransistor or photodiode). The signal from the producer circuit is passed to the consumer circuit after being carried by the optical pathway, resulting in a separated and electrically insulated circuit. HMHA2801AR4 is a type of optoisolator - transistor, photovoltaic output, which can be used in a wide range of applications.

HMHA2801AR4 optoisolator is molded in a tiny SOP4 surface-mount package. It is made up of a gallium arsenide LED, a photo-transistor and an integrated resistor. It is usually used to prevent high-voltage shocks and spikes by isolating the input line from the output line, or to provide electrical isolation between the two circuits. It also provides basic protection for microprocessors and logic circuits as well as other sensitive electronics, which makes it suitable in industrial, computer engineering, medical, instrumentation and other applications.

The LED light source emits infrared light when powered, and the light will be detected by the phototransistor. When the voltage on the pin 8 of HMHA changes, the LED light will be affected, thus the phototransistor will then control the output. This is the general working principle of the HMHA optoisolator.

One important characteristic of HMHA2801AR4 optoisolator is its absolute maximum ratings. It has a storage temperature range of -55°C to +150°C, a maximum power dissipation of100 mW and a maximum collector-emitter voltage of 30 V. Furthermore, it is designed to handle a wide variety of logic gates, up to and including the VCC of max 30V. In terms of performance, the HMHA2801AR4 optoisolator has a supply current of max 10 mA, an operating temperature range of -55°C to +100°C, a minimum break-off voltage of greater than 3.5V and an on-state voltage drop of 0.2V (typical).

In addition, the HMHA2801AR4 optoisolator has very good environmental performance. It is able to operate for a long period of time in normal temperatures, as well as being resistant to conductive particles, water and oil. Also, its insulated package makes the component immune from electrical noise and static electricity.

In conclusion, the HMHA2801AR4 optoisolator is a high-performance, reliable component that is suitable for a wide range of applications, thanks to its characteristics and environmental performance. Its general working principle is to emit infrared light when powered, and the light will be detected by the phototransistor, so as to control the output according to the voltagechange.

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