Hi,
Any ideas how to achieve the following:
Using an LS374 octal latch, under control of a *single* control line, I'd like to be able to both latch data and switch the outputs from high impedance to low impedance, without risk of any 'junk' dat appearing on the outputs of the latch whilst /OE is low.
In other words, I need to set enable to low so that the data present on the input at that time is latched, wait a little, then enable the outputs by setting /OE to low.
At a future time I need to disable the outputs by setting /OE to high,
*then* set the enable input to high so that outputs of the latch follow the inputs again.In this way the outputs of the LS373 are always either latched data or high impedance - there's never any fluttering of outputs.
Problem is my need to do this with a single external enable line - as on the external enable going high I want to change the LS373's enable line before the /OE line, but on the external enable going low again I want to change the /OE line before the chip's enable line.
I assume if I want to introduce a delay I can just couple a pair of inverters together, but that doesn't fix the need for the delay to be on a different pin of the LS373 depending on the state of the external enable line.
thoughts?
cheers
Jules