74LV17APWJ

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The 74LV17APWJ is a high performance, low power 3-state buffer device designed according to the logic family requirements of the Intel 8255A Programmable Peripheral Interface (PPI) bus transceiver. It is architectured with a 2-level input structure and is intended for fast bus applications within the Intel 8255A. The 74LV17APWJ is a 3-state device which allows for bidirectional signals with the 3-state control falling between an input (Functional) and output (Buffered) stage. It also serves as an active pull up device on the inputs. This ensures fast termination of low signals at the interface.

The 74LV17APWJ is categorized under the Logic - Buffers, Drivers, Receivers, Transceivers umbrella of components. This means that the 74LV17APWJ is an integrated circuit (IC) which is used to perform the function of an inverter, buffer, receiver, or transceiver. A buffer is an open-drain circuit which prevents an output from going beyond the power supply levels of an input. A driver is a circuit that converts an input signal into an output signal with higher power. A receiver is a circuit which reconstructs an input signal from an output signal that may have been degraded. Finally, a transceiver is an integrated circuit which performs both the function of a transmitter and receiver in one package.

The 74LV17APWJ is composed of a two-level input structure that consists of two NAND gates and two NOR gates. The two input stages (function and buffered) allow for bidirectional signals with the 3-state control falling between them. The input stage consists of two NAND gates and works similarly to that of a D flip-flop in that it has two inputs: an input (functional) for active low signals, and an output (buffered) for active high signals. When the input stage is enabled, the output is inverted and the 74LV17APWJ is in the buffered state. This ensures fast termination of low signals at the interface. The integrated circuit also features an active pullup device and a 3-state output.

The internal working of the 74LV17APWJ involves the use of MOSFET transistor technology. MOSFETs have been increasingly used as a cost efficient method for implementing logic circuits. MOSFETs are used in the internal construction of the 74LV17APWJ in order to perform three basic functions: amplifying, transmitting, and switching. The switching of the output of the NAND gates and the NOR gates, is performed by MOSFETs in the input stage. The output is then amplified and transmitted by MOSFETs in the output stage. This ensures that the output voltage stays within the specified power supply range. Additionally, the MOSFET components of the integrated circuits ensure that there is low power dissipation (the power required to breakdown a transistor) which, in turn, makes the integrated circuit more energy efficient.

The 74LV17APWJ, belonging to the Logic - Buffers, Drivers, Receivers, Transceivers component category, is extensively used in applications such as communication networks, data acquisition systems, and signal conditioning applications, as well as in any other logic device requiring active pull-up and active three-state control. The 74LV17APWJ is highly effective for interfacing input and output signals with logic and bus circuits, as well as for emulation in interfacing with multiple bus types. Its two-level input structure makes it ideal for fast bus applications, and its low power dissipation capability makes it energy efficient.

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