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

 

1. Get an FPGA
2. Work out the truth table for a 64:6 priority encoder
3. Implement it

 

A micro-controller and eight PCF8574T bus expander chips?

 

9 pcs of 74LS348...

Or 4 pcs of 4514 with some glue logic.

 

Thank you all,

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