> Hi ,
> Can anyone here help me to solve one task from my study. I tried to
> find a solution for it by myself but hanged up.
> I have a logic function F(A,B,C). After a simplification I received a
> simple function as following:
>  F(A,B,C)= A XOR C.
> I was said to implemented the function with 4*1  MUX and 2*1 MUX. And
> it is OK, I did it.
> Now I have to implemetent it with  2-to-4 decoder and NAND gate. The
> decoder is 74LS139 .
> (This decoder has Enable pin) How can I do it ?

> Thank you in advance.

Connect A to A0 of decoder
Connect C to A1 of decoder
Connect O1 (is negated) to first input NAND gate
Connect O2 (is negated) to second input NAND gate

and you have XOR function
Enable pin connect to ground

Mariusz

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> Hi ,
> Can anyone here help me to solve one task from my study. I tried to
> find a solution for it by myself but hanged up.
> I have a logic function F(A,B,C). After a simplification I received a
> simple function as following:
>  F(A,B,C)= A XOR C.
> I was said to implemented the function with 4*1  MUX and 2*1 MUX. And
> it is OK, I did it.
> Now I have to implemetent it with  2-to-4 decoder and NAND gate. The
> decoder is 74LS139 .
> (This decoder has Enable pin) How can I do it ?

> Thank you in advance.