H11L23S

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Optoisolators are a type of electronic component which provides electrical isolation, protect against potential damage to digital circuits, and also maintain a higher level of noise immunity. The H11L23S optoisolator is particularly well-suited to providing isolation and signal conversion for logic outputs, such as TTL-to-CMOS.

The H11L23S optoisolator consists of a light-emitting diode (LED) and a phototransistor within a single package. The key advantage of this device is that it provides electrical isolation between input and output without any need for additional components or wiring. This helps to prevent ground loop problems that can affect other types of optoisolators. The device has a nominal forward voltage drop of just 1.2V.

In operation, a signal is applied to the anode of the LED, typically from a TTL logic gate. When the TTL input is high, current flows via the LED and the phototransistor is switched on, completing the electrical circuit and supplying current to the TTL output. When the TTL input is low, the LED is turned off and no current is drawn from the output. This helps to provide improved noise immunity for the TTL output, as any noise or interference picked up along the signal path is not transferred to the TTL circuit.

The H11L23S optoisolator is available in a variety of package types, such as DIP and flatpacks, and can provide a wide range of current transfer ratios. It can also provide a wide range of input/output voltage combinations, from 5 volts to 24 volts. These features make the device particularly suitable for use in a variety of applications, such as industrial automation, automotive and aerospace.

The H11L23S optoisolator is a robust and reliable component, designed to provide electrical isolation and signal conversion for TTL-to-CMOS signal outputs. It can be used in a wide variety of applications, providing improved signal integrity and noise immunity. The low forward voltage drop and range of package types make the device an attractive option for many logic output applications.

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