Which of the following is an advantage of use of multiplexers? I. Logic design…
2021
Which of the following is an advantage of use of multiplexers?
I. Logic design is simplified.
II. Minimizes IC package count.
III. Simplification of logic expression is not required.
Answer: D. I, II and III — ConceptA multiplexer is a data selector: its select inputs determine which data input reaches the output. A Boolean function can therefore be mapped from its…
- A.
I and II
- B.
II and III
- C.
I and III
- D.
I, II and III
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Correct answer: D
Concept
A multiplexer is a data selector: its select inputs determine which data input reaches the output. A Boolean function can therefore be mapped from its truth table to the MUX data inputs, often replacing a network of separate gates with one MSI device.
Application
Statement I: selecting among prepared data inputs gives the designer a regular, structured way to realize the required logic.
Statement II: one multiplexer package can replace several separate AND, OR, and NOT gate packages, so the IC package count can decrease.
Statement III: the truth-table outputs can be wired directly to the MUX data inputs; prior Karnaugh-map or Boolean-algebra simplification is not required.
Cross-check
The three effects follow from the same truth-table implementation method: regular selection simplifies the design process, consolidation reduces package count, and direct mapping avoids a separate minimization step.
Result
I, II and III.