Graphics, Figures & Tables ⇒ pgf | Circuits and ICs

[mojo]

Can someone suggest a way for me to create an integrated circuit element in a PGF drawing? I'm trying to draw some logic circuits, and I need to use more than just the basic logic gates.

For example, I'd like to use a 74151N Multiplexer.

Block diagram for LS74151N

74151N Block Diagram.png (3.22 KiB) Viewed 1282 times

It would be nice if I could create a drawing object with the correct number (and style) of inputs with the correct labels.
The closest thing I see is an IEC logic gate, but it doesn't allow labeling the inputs (the order of the D_n and S_n are important), which would make the resulting circuit somewhat difficult to understand.

I know I could just draw the figure by hand (and I'll do that if it comes to it), but I was wondering if the PGF circuits library had anything that would make this both more elegant and (perhaps) easier.

Thanks.