Multiplexers Part 2

A video by Jim Pytel for renewable energy technology students at Columbia Gorge Community College.

Category:

Education

Tags:

• CGCC
• RET

[balkan365]

I have a question.

Let's say I have a 32 input MUX,performing parallel to serial data conversion.What would be the MOD#,MOD counter that would be required to provide data select inputs? Thank you.

[cgcclive]

@balkan365

Excellent question. I'm going from memory but I think the video lecture has a 3 bit counter with 8 different positions? So if we extended this to a 4 bit address it would allow us 16 different positions. Extend it again to 5 bits and we're now allowed 32 different positions.

[cgcclive]

@cgcclive

Now, here's a good exercise ... what if you had 50 different positions? How many address bits would you need? Well our 5 bit address wouldn't cut it anymore and we'd have to go to 6 bits which would allow us 64 different positions. It would just have a bunch of unassigned addresses that could be used if you were ever to expand the system. Make sense?

Jim Pytel

CGCC RET Instructor

[SuperCanyoudigit]

How to represent 40:1 mux using 8:1 mux(s)??.....plzzz reply fast....

[SHITONASTICK1100]

thanks man! 

[helloashok20]

I want to add one 2:1 mux instead of OR gate at the end....if we add then wht about the select line of 2:1 mux......how can i write the output when i am considering the select line of 2:1 mux including other two mux as well..............Plz reply..its urgent