| 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 |
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| 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 |
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| vonkhades |
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| okelk |
...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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