74ACT11240DBR

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The 74ACT11240DBR is an integrated circuit (IC) designed to provide fast logic-level conversion for application fields such as communication systems, security systems, and industrial control. It is a logic-level input buffer and output driver with two-input AND-OR-INVERT (AOI) logic. The IC has differential inputs that reduce noise susceptibility. The 74ACT11240DBR can bidirectionally switch signals between high and low logic levels.

Application Field

The 74ACT11240DBR is typically used in digital systems requiring fast logic-level conversion. It is also used in an asynchronous-bus environment where a host processor needs to be isolated from the bus traffic. The 74ACT11240DBR is useful in high-speed logic applications where inputs can directly drive other logic-level devices. It is also applicable in many scenarios that necessitate high transient immunity. The 74ACT11240DBR is an ideal choice for communication systems, security systems, industrial control, and any other system requiring fast level conversion.

Working Principle

The 74ACT11240DBR is composed of two pass transistors driven by the gating logic on the chip. The transistors serve as high-speed, logic-level switches, respectively controlling the signal lines going into and out of the chip. The gate logic allows the IC to have different functions depending on the input signals. When both input signals A and B are low, the transistors are off, and the output is high-impedance with no current flowing. When A is high and B is low, the first transistor is on, allowing the voltage on the input to pass through to the output. When A is low and B is high, the second transistor is on, allowing the voltage in the output to drive the input. Finally, when both A and B are high, the transistors are both off and the output is high-impedance.

The AOI logic controls the flow of the input signal. When both A and B are low, the output of the AOI logic is high, and the transistors are on. With A high and B low, the output of the AOI logic is low, and the first transistor is on. Similarly, when A is low and B is high, the output of the AOI logic is low, and the second transistor is on. Finally, when both A and B are high, the output of the AOI logic is low and both transistors are off.

The 74ACT11240DBR is able to switch quickly between logic levels, allowing it to be used in high-speed logic applications. It can accommodate up to 18V input and output voltage, allowing it to be used in both logic-level and high-speed applications. Finally, the differential input design improves noise immunity and reduces susceptibility to interference.

The 74ACT11240DBR provides a reliable, fast, and robust solution for many applications requiring a fast logic-level conversion. It is a flexible and versatile IC that can be used in a wide variety of applications, making it an ideal choice for communication systems, security systems, and industrial control.

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