Except that the circuit at the above URL is NOT a "D-latch" in the conventional sense of the word... a "D-latch" is edge-triggered, and the circuit at the URL is "re-settable" as long as "E" is high and thus is called a "transparent latch".
...Jim Thompson
Ooops..You're right.. I'm looking at the wrong latch to review... I'll be reading...
Also... I've been writing D latch all this time... Saying positive edge triggered D type flip flop would be more descriptive.. Like the SN74AHC74.
I hope I don't get bounced into the electronics.basic group for that one...:)
D
No. Happens all the time... promulgated by lousy data sheet writers ;-)
...Jim Thompson
It's not illegal. And in this case, simultaneous set and reset shouldn't happen. If it did happen, it would just extend the prop delay of the whole thing a little.
Can't see why. Using edge-triggered flops just seems, to me, to add asymmetry and complexity to a simple concept.
John
IIRC: There nothing stopping you from connecting a reference to pin 5. This makes the THR voltage fairly well known.
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