Hi sorry for the late response but I was on vacation.

Why did you choose the "lvc" variant?

Well to be honest the HW people did and it's all I could test with.  I don't
know much about these naming schemes, apart from the intuition it has to do
with frequency and line levels.

Ideally, you want to put the oldest "manuf,74x594" variant here.

What do you mean by oldest? What would you suggest? it's funny because the chip
is going to be used on a new product that is meant to be produced for years.

I once read it was Motorola who invented the 7459x parts, to interface with
SPI.

Gr{oetje,eeting}s,

                        Geert

Thanks for your comments!
	Nicolas