What is the main function of a demultiplexer?

The main function of a demultiplexer is indeed data distribution, which involves taking a single input signal and routing it to one of several outputs based on control signals. This allows a demultiplexer to effectively distribute data from a single source to multiple destinations, ensuring that each output receives the necessary signal without interference.

In a typical application, for instance, a demultiplexer can be used in communication systems where data from one line needs to be sent out to multiple lines selectively. The ability to decode the control signals and manage multiple outputs highlights the role of the demultiplexer in organizing data flow for efficient communication.

The other options refer to different functionalities that do not align as closely with the primary purpose of a demultiplexer. Counting is related to digital circuits that keep track of frequency or events, while decoding refers to converting encoded information back into its original format. A gating device may control the access of a signal but does not inherently have the data routing capabilities of a demultiplexer. Thus, the focus on data distribution represents the essential role a demultiplexer plays in digital systems.