What logic function could I build this with ?

Thread Starter

ARMDeveloper

Joined Aug 16, 2007
8
I am looking for a logic IC that has 3 inputs and 4 outputs as follows:

Input1 Input2 Input3Out1 Out2 Out3 Out4
0xx 0000
100 0000
101 1001
110 0110
111 0011

How could I build this ?

What if I used only some of the pins of an LED hex driver ? Input1 is actually a clock signal that has to run at about 100KHz.
 

Thread Starter

ARMDeveloper

Joined Aug 16, 2007
8
No one IC will do it I think. You'd either need discrete ic's or a microcontroller.
100khz is no big deal.
An ARM micro drives this circuit. It would take too many pins to implement directly with it. Maybe I will change the design though. I don't feel like putting a bunch of discretes on the board.
 

Papabravo

Joined Feb 24, 2006
14,410
Any garden variety PAL will do the trick. I keep a stock of GAL22V10 for just such a case. You could probably do it with a smaller PAL but they might be hard to find.
 
Top