Try a 74xx151 multiplexer.

Naming the inputs from your original diagram:

A & B are the inputs to the left-side and gate.
C is the input to the or gate
D is the input to the right side and gate

Connect A, B and C to the A, B and C address inputs of the mux.

Connect D to mux inputs 3, 4, 5, 6 and 7

Connect the remaining mux inputs to ground.

The output will be the signal you want.

Bob Ammerman
RAm Systems




----- Original Message ----- 
From: "Denny Esterline" <firmware@tds.net>
To: "piclist" <piclist@mit.edu>
Sent: Thursday, October 14, 2004 4:12 PM
Subject: [EE] AND-OR-AND - simplest implementation?


>I need a simple logic function, a two input AND feeding a two input OR
> feeding another two input AND [see picture]. Since I don't need any other
> logic in the project I hate waste the space and use two chips, is anyone
> else's Boolean algebra less rusty that mine? Is there a one part
> implementation (other than a PAL or CPLD)?
>
> Thanks
> -Denny
>
>
>


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