Understanding a multiplexed display interface A “multiplexed display” being driven by a logic circuit typically behaves like which of the following digital functions?

Introduction / Context:
In digital electronics, the word “multiplexed” often refers to the technique of selecting one of many inputs to drive a shared output resource for a short time slice. This is central to display scanning, where multiple digit modules share segment lines and are enabled one at a time in rapid succession.

Given Data / Assumptions:

• A logic circuit time-shares resources among several display elements (digits).
• Only one source is selected to drive the common output bus at any instant.
• Human persistence of vision makes sequential updates appear simultaneous.

Concept / Approach:
The fundamental digital component that models this selection is the multiplexer (data selector). A multiplexer accepts many data inputs and, under control of select lines, routes exactly one input to the output. In displays, digit-select lines and segment busses implement the same concept at the system level.

Step-by-Step Solution:

Verification / Alternative check:
Contrast with a demultiplexer (one input to many outputs), which is not the typical function implied by “multiplexed display” selection of input data.

Why Other Options Are Wrong:

• (a) describes a demultiplexer, not a multiplexer.
• (c) is a broadcast or bus-driver scenario, not selected routing.
• (d) is overly specific and not a generic definition.

Common Pitfalls:
Confusing the system-level display scanning (digit enabling) with the data-selection concept; both occur, but the term “multiplexed” aligns with selecting one of many inputs at a time.

Final Answer:
accepts data inputs from several lines and allows one of them at a time to pass to the output