In digital systems, a demultiplexer (DEMUX) takes one input and routes it to one of many outputs based on select lines. What is another common name for a demultiplexer?

Introduction / Context:
Multiplexers (MUXes) and demultiplexers (DEMUXes) are complementary switching elements used throughout digital design, communications, and data acquisition. Understanding their alternate names clarifies datasheets and schematic notations.

Given Data / Assumptions:

• A demultiplexer has one data input, multiple outputs, and select lines.
• The function is to distribute the single input to one of the outputs.
• We look for a standard synonym used in textbooks and vendor literature.

Concept / Approach:
By definition, a demultiplexer performs the inverse role of a multiplexer. Where a MUX is a “data selector,” a DEMUX is a “data distributor.” The select lines choose which single output line receives the input value.

Step-by-Step Solution:
Recall: MUX = many inputs → one output (data selector).DEMUX = one input → many outputs (data distributor).Match the synonym: “data distributor.”

Verification / Alternative check:
Check block symbols: a DEMUX symbol shows one input feeding a bank of outputs labeled by select lines, consistent with distribution.

Why Other Options Are Wrong:
data selector: synonym for multiplexer, not demultiplexer.multiplexer: opposite device.encoder: converts active input line to a coded output, a different function.None of the above: incorrect because “data distributor” is correct.

Common Pitfalls:
Confusing MUX and DEMUX names; forgetting that select line naming conventions may differ (S0..Sn vs. A..C).

Final Answer:
data distributor