74LVC157APW,118

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Logic circuits are a critical component to many complex electrical systems. The ability to reliably and accurately sequence the flow of current within a programmed circuit has the potential to streamline the electrical system and speed up the processes of the circuit. One device that has increased the performance potential of logic circuits is the 74LVC157APW,118 multiplexer. In this article, we will discuss the application fields and working principles of the 74LVC157APW,118.

The 74LVC157APW,118 is a multiplexer-decoder integrated circuit. This device enables the user to quickly and reliably transfer one of 16 inputs from 8 separate 2-input sources. A logic ‘1’ at the enable input selects the multiplexer source and a logic ‘0’ at the enable input selects the decoder source. In addition, the device features a built-in data flip-flop, this allows for the transmission of data from multiple sources and receipt of data from multiple backplane locations. The 74LVC157APW,118 is exceptionally versatile, as it can generally be used in any logic circuit and can be configured to fit any system.

The application fields and working principle of the 74LVC157APW,118 are interesting and diverse. This device can be used in common logic circuits such as arithmetic circuits and address buses. The device can also be used in applications that require 8-bit microprocessor systems, clock MHz transcoding, data exchange between multiple microprocessors and intelligent peripherals/controllers. Additionally, this device can be utilized in high-speed interface applications such as fiber optic links, Ethernet and multiplexers/modems.

In terms of working principle, the 74LVC157APW,118 is composed of two high-speed, four channel multiplexers. The multiplexer channels are designed such that a single high-performance tri-state output buffer can be used to select the active source. When a logic ‘1’ is applied to the enable input, the source addressed by the multiplexer select lines is selected and placed on the output bus. When the enable input is logic ‘0’, the decoder select lines drive the active source to the output.

The 74LVC157APW,118 employs a dynamic selection of the active source. The state of the banking output will vary depending on the output state of the selected source. This makes it difficult to predict the banking output without knowledge of the state of the selected source, however the multiplexer will always select the active source. One issue to note is that the enable input may cause contention which can cause the banking output to become invalid and result in incorrect data transmission. To prevent this issue, the device includes a low enable enable threshold voltage.

The 74LVC157APW,118 is an important device in the world of logic circuit design, as it allows for the quick and reliable transfer of one of 16 inputs from 8 separate 2-input sources. The device can be used in multiple applications and can be configured to fit any system. Additionally, the device features a built-in data flip-flop which enables the transmission of data from multiple sources and the receipt of data from multiple backplane locations. While the device’s selection process can be somewhat unpredictable, the device includes a low enable enable threshold voltage which prevents contention. Overall, the 74LVC157APW,118 provides an efficient and reliable framework for high-speed interface applications.

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