CD74ACT258M

The CD74ACT258M is a quad analog multiplexer, a logic-signal switching device that routes any of four input signals to a single output line. It is an example of what is called an "Address/Data multiplexer," as it has four address inputs that select which of the four data inputs to route to the output. A "DIRECT" input pin is then used to control whether the output follows the selected data, or passes the address straight through.

Like all multiplexers, the primary function of the CD74ACT258M is to perform multiplexing, or the combining of multiple signals into a single path. For example, it can be used to transfer four 8-bit bytes at once, to a different device. This can be extremely useful for applications where multiple data needs to be transferred quickly, such as in video streaming or high-speed networking.

In addition to its multiplexing capabilities, the CD74ACT258M also supports address and data demultiplexing. This allows a single 8-bit data pin to be routed to one of four available outputs, via the four address pins. This type of demultiplexing can be used for data isolation, as well as for splitting a single digital signal into four independent control signals. The CD74ACT258M also includes error detection logic, allowing the unit to ignore spurious inputs or detect data errors.

The CD74ACT258M is powered by a single +5 VDC supply and features a wide selection of power-saving features, such as a low-power active enable mode, which controls each output line independently. This allows the user to reduce the power consumption of unused data lines while still keeping the multiplexer active. Other features include an asynchronous reset pin, a programmable addressable output, and an active LOW "READY" signal.

The CD74ACT258M is designed to provide excellent signal integrity and low power consumption, making it ideal for applications such as high-speed signal multiplexing, data isolation, and logic switching. It is also highly reliable and can be used in temperature ranges from 0°C to +70°C. This makes it a great choice for designers who require a reliable, efficient, and cost-effective multiplexing solution.