Multiplexing concept: A multiplexer (MUX) is also commonly known as a _____ because it selects one of many inputs to pass to a single output line.

Introduction / Context:
Multiplexers are standard combinational circuits that route one of several data inputs to a single output, controlled by select lines. Because their primary job is to choose among inputs, they are often called “data selectors.” This device is central to datapaths, bus sharing, and signal routing.

Given Data / Assumptions:

• Multiplexer inputs: multiple data lines (e.g., D0..Dn-1).
• Control inputs: select lines that choose which data appears at the output.
• Output: a single line carrying the selected input.

Concept / Approach:
The alternate name “data selector” emphasizes selection rather than routing. Select lines encode the index of the chosen input: for N inputs, log2(N) select bits are required. By cascading multiplexers, designers build wide selectors, arithmetic units, or implement conditional moves in hardware.

Step-by-Step Solution:
Identify the function: choose one input among many.Relate the function to the common alias: “data selector.”Select “data selector.”

Verification / Alternative check:
Datasheets (e.g., 74HC157, 74HC151) explicitly describe multiplexers as data selectors, and many schematic symbols label them as such.

Why Other Options Are Wrong:
Coder/decoder refer to encoders/decoders, not multiplexers. Multivibrator is an oscillator/bistable/monostable circuit category, unrelated to input selection.

Common Pitfalls:
Confusing multiplexers (many-to-one) with demultiplexers (one-to-many) due to similar names.

Final Answer:
data selector.