I am trying to distribute 4 parallel data lines to 1 of 2 different destination

dcart21

Hello out there. I am trying to distribute 4 parallel data lines to 1 of 2 different destinations. So I am looking for a logic chip with 8 outputs (2 sets of four) and 4 inputs. (Plus a selector line of course).

So I am looking for an IC equivalent, or a minimal combination of gates to accomplish this. Still new to all this.

Thanks!

Darren

[noparse][[/noparse]Moderator added subject]

Post Edited By Moderator (Chris Savage (Parallax)) : 4/28/2008 10:45:56 PM GMT

Andy Fox

I think you could easily do this with a couple of TTL octal latches or bus transceivers (74LS240, 244 or 245). You'd only use 4 of the 8 lines on each, and you can toggle which set is "enabled" using a couple I/O lines from the BS2.

Velocit

Sounds like you just need a 4-bit demultiplexer (deMUX). This chip should work well:

focus.ti.com/lit/ds/symlink/sn74cbt3257c.pdf

...and it's available at Mouser for $0.53.

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-Paul

dcart21

That chip looks like the ticket, but unfortunately I was looking for something in a DIP package (just using plug boards).

Thanks for all the info so far!

Velocit

Take a look here then:

www.onsemi.com/pub_link/Collateral/MC14551B-D.PDF

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-Paul

dcart21

I just realized a CD4508B I had purchased previously would probably work. What do you all think?

focus.ti.com/lit/ds/symlink/cd4508b.pdf

Thanks for all your ideas!
Darren

Andy Fox

If your data is only going one way (out) you could use the CD4508B and just tie the latch inputs together and select which set is output. Otherwise that MC14551B looks pretty good for what you need.

dcart21

Yep, the 4bit data is going one way only, so the cd4508b should do the trick. Thank for all your help.

Darren