Maker Pro
Maker Pro

Doubt about it 6-to-64 decoder

dorke

Jun 20, 2015
2,342
Joined
Jun 20, 2015
Messages
2,342
That line is connected to E2 .
It can be used as X6 if you need another address bit to create a 7 to128 decoder.
If unused, it should be connected to "1" constantly.

BTW,
you can used the 74154 to reduce the chip count.
 

tnnelectro

Apr 5, 2012
54
Joined
Apr 5, 2012
Messages
54
perfect,
But if I wanted to use the 74hc154 ... how would it be connected?
 

dorke

Jun 20, 2015
2,342
Joined
Jun 20, 2015
Messages
2,342
You would use four 74hc154 and one 139, for a total of 5 instead of 9 ICs.
What is this decoder for there may be other implementations.
154.JPG
 

AnalogKid

Jun 10, 2015
2,688
Joined
Jun 10, 2015
Messages
2,688
The #1 schematic is backwards from the traditional way of doing a staged address decoder. Usually the low order address bits to to all of the low level output generators, and the higher order address bits go to the pre-selector. #4 shows this.

ak
 

tnnelectro

Apr 5, 2012
54
Joined
Apr 5, 2012
Messages
54
Thanks great solution!

And if I wanted to do the opposite, that is 64-to-6?
 
Top