SN74ALVCH245PWR

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The SN74ALVCH245PWR is a device from Texas Instruments\' Logic - Buffers, Drivers, Receivers, Transceivers category.

The SN74ALVCH245PWR is a multi-bit logic translator and signal multiplexer/demultiplexer device that provides logic level translation between two logic families, VCCO3V3 and VCCO5V. It allows data to be transferred bi-directionally between two different systems and so is suitable for applications such as USB, CAN and data bus systems.

The SN74ALVCH245PWR is an ideal device for bridging multiple voltage domains. It provides 2:1 bus-controlled signal selection/generation between VCCO3V3 and VCCO5V logical compatibility. It has two output enable controls providing buffered outputs between VCCO3V3 and the VCCO5V. It also provides the capability of level transitioning from 3V3 to 5V, and vice-versa.

The device features programmable bus hold capability for improved more off state power savings. When power is removed from the device, the output lines remain in a fixed high impedance state, which helps reduce power consumption. So it makes the device attractive for battery-powered applications.

As for the working principle, the SN74ALVCH245PWR features a high-speed tandem differential/signal-channel architecture, which provides high performance over standard CMOS designs. The device utilizes two different modules called the Input Module and the Output Module.

The Input Module processes the 3V3 logic signals and converts them into the 5V logic signals. It consists of three components, namely, the Input Register, the Logic Encoder and the Logic Comparator. The Input Register stores the logic signals and carries out the necessary logic operations. The Logic Encoder converts the data from the Input Register into 5V suitable signals that can be recognized by the Output Module. Finally, the Logic Comparator monitors the input signals in order to adjust the VCCO to the required level.

The Output Module, on the other hand, receives the 5V suitable signals from the Input Module and processes them. It consists of two stages, an output stage and a latch stage. The output stage buffers the incoming signals and shifts them from the 3V3 logic to the 5V logic. The latch stage further amplifies the signals and sends them onto the external components.

In summary, the SN74ALVCH245PWR device is an ideal choice for applications such as USB, CAN and data bus systems as it allows data to be transferred bi-directionally between two different systems. It utilizes two modules, the Input Module, which processes 3V3 logic signals to 5V logic and the Output Module, which amplifies the incoming signals and shifts them from 3V3 to 5V logic.

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