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74AUP logic as input 'comparator' ?
MUFF WIGGLER Forum Index -> Video Synthesis  
Author 74AUP logic as input 'comparator' ?
okelk
I want to build a bunch of logic modules with a lot of in and outputs.
In search of a more economical way to interface them then to use an op amp on every input I came across the AUP series logic.

Operated at 1V they trigger at approximately the right voltages to be compatible with the LZX system.
They can clamp 50ma, so a 1k resistor on the input should be good enough to protect against over/under voltage.
The open-drain output makes it easy to interface with HC/AHC - logic...
...the sot package is is no fun to hand solder...but doable...

Has anybody tried this before, or a better idea on how to interface with logic ICs?

Here's a link to a 74AUP1G07 schmitt-trigger buffer as a reference:

74AUP1G07
vonkhades
I'm also in the hunt for a Logic eurorack module... checking the 74AUP1G07 datasheet I'm not completely sure if that IC get upto Video Frequencies (can't find the info on the PDF...)... I would need at least 2MHz-3MHz
vonkhades
The TI datasheet for the 74AUP1G07 says it was tested on 10Mhz

http://www.farnell.com/datasheets/1857215.pdf?_ga=2.62781738.701049183 .1502897095-1973788285.1502897095

So I guess it should work fine...
okelk
vonkhades wrote:
The TI datasheet for the 74AUP1G07 says it was tested on 10Mhz

http://www.farnell.com/datasheets/1857215.pdf?_ga=2.62781738.701049183 .1502897095-1973788285.1502897095

So I guess it should work fine...



...AUP is definitely much faster than that...datasheets usually don't give you a maximum operating frequency, only the 'propagation delay time' ...but without a big load and under less than ideal coinditions it would probably be <20ns...which is more than fast enough....even for higher resolutions than SD video...
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