How to implement 64 to 6 decoder

[tnnedaboard]

Hi,
I used 74HC137 to create a 6-to-64 demultiplexer following the schema on page 13 of the attached datasheet ...
Now I have to do the reverse operation, that is 64-to-6 ...
How can I do?

Thank you.

https://assets.nexperia.com/documents/data-sheet/74HC137.pdf

 

[c_mitra]

I guess you have to series 8 multiplexers. It is simple and straightforward but messy to the core.

 

[betwixt]

It's messy but there are some short cuts, for example only inputs >=32 will set the MSB and only odd numbered inputs will set the LSB so you may be able to simplify the logic.
Search for "priority encoder" for more ideas.

Brian.

 

[tnnedaboard]

Thank you all,

I resolved by looking at the datasheet of 74LS348 on page 4.

 

[tnnedaboard]

Doubt about it 6-to-64 decoder

Hi,
I followed the attached diagram, the datasheet of 74HC137, to create a 6-to-64 decoder,

But I have a doubt:

The pin shown in the arrow, always connected to the STROBE signal?

https://obrazki.elektroda.pl/5079304200_1501508499.jpg