SN74CBT3345CDWR

The SN74CBT3345CDWR is a logic device in the Logic - Signal Switches, Multiplexers, Decoders classification. It is a 20-bit data selector/multiplexer with low on-resistance characterized for use in applications requiring high speed for systems based on the LVTTL, FAST, and Low-Power Schottky logic families. It is designed to provide increased performance and t capability over existing bus switch logic products.

The SN74CBT3345CDWR is an integrated circuit that has two high speed data selectors/multiplexers with individual enables and one 20-bit data bus. The two sections performs the same task but with different data buses. The first section is 10 bits wide, while the second is 20 bits wide. Each of the selectors/multiplexers accepts 4 inputs and provides one output. The output is the data selected by the selector/multiplexer.

The device works by detecting the logic level at each of the four inputs and then selecting the appropriate data bus line. When the enable input is enabled, the output is the data on the selected data bus line. If the enable input is disabled, the output is disabled and the output will remain in a low impedance state regardless of the logic levels of the data bus lines.

The device also has an active-low "active bus-hold" function that allows the device to maintain the last data bus line selected when the enable input is disabled. This can be useful in systems where the data bus line needs to be held for a short period of time. The device can also be configured for level triggering (where all inputs must be held at the same logic level for switching to occur) or edge triggering (where data on the data bus line must change for a switch to occur).

In addition to the selectors/multiplexers, the device also includes two output enable pins and two input enable pins. The output enable pins provide control of the outputs, while the input enable pins allow the device to be configured to accept either active-low data or active-high data. This allows the device to be used in systems where the data bus line level can change frequently.

Overall, the SN74CBT3345CDWR is a high performance and feature rich logic device that is well suited for applications requiring fast and reliable data selection and multiplexing. Its active-low "active bus-hold" function and input/output enable pins make it highly configurable and its low on-resistance makes it well suited for use in high speed LVTTL, FAST, and Low-Power Schottky logic systems.