CD74HC4002PWT

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The CD74HC4002PWT is an integrated circuit (IC) of the logic - Gates and Inverters family. It has two four-input NAND gates, also known as Schmitt trigger NAND gates. The output of the NAND gates is generated on the basis of the logic of inputs, which includes high-to-low transitions, incoming logic levels and both internal and external feedback. The gates generate a wide voltage range with hysteresis, while simultaneously ensuring the transmission of very low current pulses.

Application Field and Working Principle

The primary application field of the CD74HC4002PWT is in industrial control, instrumentation, and military and aerospace systems, where it provides efficient logic logic and triggering capabilities. The CD74HC4002PWT also finds application in multimedia devices, digital systems, and network communication drivers. The device is widely used for logic, phone line interface and low-noise amplifier (LNA) applications.

The CD74HC4002PWT comprises of two four-input NAND gates, which each have an enable/disable pin for each of their two outputs. Both of the enable/disable pins require external supplies, with the enable pin (EN1/EN2) being pulled low to enable the gate, and the disable pin (DIS1/DIS2) being pulled high to disable the gate. The device also provides an internal disable pin, which is pulled low to enable the gate, and pulled high to disable it. The input of the NAND gate is composed of four logic inputs that are inverting or non-inverting logic, which means that the state of the logic circuit can be switched between different logic levels through the logic level of the inputs.

The NAND gate’s outputs are based on the logic level of the inputs. High-to-low transitions, incoming logic levels and both internal and external feedback are all taken into account to generate the output of the NAND gate. The device can be used to activate high-speed circuitry, varying from TTL to CMOS, and is a great choice for direct connection with TTL inputs. In terms of propagation delay, the gate is extremely fast and low power, meaning it is capable of driving more logic than the TTL NAND gates.

Thanks to its hysteresis feature, the CD74HC4002PWT guarantees a wide voltage range at the output. The hysteresis is maintained with low supply current and high switching speed, which is perfect for applications with fast switching and in low-power conditions. The device also guarantees a very low current input pulse transmission, meaning it is well suited for sensor switching applications.

With its high speed, low power operation, and compact design, the CD74HC4002PWT is an excellent choice for applications that require logic and triggering capabilities. Its NAND gate outputs, based on its logic level inputs, offer fast and reliable performance for industrial, instrumentation, communication, and multi-media applications.

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