Looking for newer versions of IC

[messinaboot]

I came across a schematic for a 1980s keyboard controller. I fancied re-creating the circuit rather than using a microcontroller. Should I use the same IC (not sure if they are still available) or should I use a newer version, what would be the newer versions?

7445 - BCD to decimal decoder
74LS30 - 8 gate NAND
74LS163 - 4 bit counter
74LS251 - 1 of 8 line selector

Thanks for any help

 

[danadak]

I came across a schematic for a 1980s keyboard controller. I fancied re-creating the circuit rather than using a microcontroller. Should I use the same IC (not sure if they are still available() or should I use a newer version, what would be the newer versions?

7445 - BCD to decimal decoder
74LS30 - 8 gate NAND
74LS163 - 4 bit counter
74LS251 - 1 of 8 line selector

Thanks for any help

Post the schematic will help to answer your question.

 

[messinaboot]

 

[messinaboot]

Post the schematic will help to answer your question.

done