An eight input multiplexer can easily be converted for use as a parallel to serial converter. What would be the appropriate way to sequence the data select inputs?
A) Use a MOD 8 Asynchronous converter.
B) Use three Asynchronous FF's as converters.
C) Use three synchronous FF's as converters.
D) Both A and C

Question

Quizplus · Accepted Answer

To convert an eight input multiplexer into a parallel to serial converter, the data select inputs must be sequenced properly. This can be achieved by using a MOD 8 counter to cycle through the inputs. Both asynchronous and synchronous FFs (Flip-Flops) can be used to build such counters, but for precise sequencing and synchronization with a system clock, using three synchronous FFs as a MOD 8 counter (since 2^3=8) is the most appropriate method. Therefore, both using a MOD 8 counter and using three synchronous FFs are correct approaches, making option D the correct answer.

An Eight Input Multiplexer Can Easily Be Converted for Use