74HC244 question(s)

cbmeeks

I have a few questions about the 74xx244 buffers

This is the non-inverting buffer.

Ok, let's assume this IC has a 12ns propagation delay.

If I make A0 high, then 12ns later, Y0 become high...right?

Now, if I make A0 low does it also take 12ns before Y0 goes to low? Or is it immediate?

Thanks!

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Paul Baker

Depending on the technology (LS, F, HC, etc) the high to low and low to high propagation delay can be different, if only one value·(T_pd)·is given, it is the same value for both transistions, so it would be 12ns in both instances.

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·1+1=10