H11L2FM

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Optoisolators, or optocouplers, are a type of electrical component used to transfer signals between two isolated circuits. They are especially useful in situations where high voltages, high-frequency signals, or ground loops cannot be trusted, and their use can reduce the risk of damaging other equipment. Optoisolators are widely used in applications such as motor control, logic circuits, analog circuit protection, and industrial process control.

The H11L2FM is a high-speed general-purpose optoisolator, suitable for logic output applications. It has an illuminated LED and a silicon NPN phototransistor mounted in an 8-pin DIP package. The LED is typically driven by a microcontroller’s logic output, while the phototransistor is used to indicate the logic state of the output signal.

The H11L2FM provides solid logic-level isolation between the input and output sides of the circuit. Its input-side LED is driven by a logic signal from a microcontroller and the output side phototransistor is configured for active-high or active-low detector operation. The optoisolator also has protection circuitry to prevent reverse current from flowing through the device.

The H11L2FM’s operation begins when the input side LED is illuminated by the microcontroller’s logic output signal. This causes the output side phototransistor to conduct, allowing the output signal on the output side of the optoisolator to change from low to high, or from high to low, depending on whether the phototransistor is set up for active-high or active-low detector operation.

The H11L2FM’s protection circuitry prevents reverse current from flowing through the device, thus ensuring that the logic output signal on the output side of the optoisolator is not influenced by external sources.

The H11L2FM’s advantages include its high-speed logic output operation, its ability to protect circuits from reverse current, and its low voltage operation. It is a great choice for applications involving logic output, such as motor control, logic circuits, analog circuit protection, and industrial process control.

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