Recently, Somebody Somewhere wrote these words
> I am trusting that the flu isn't contagious 'virtually' but I have
> some of this in my test kit.
>
> It has this annoying fault that it fails to drive some dacs at room
> temprature. Put the board in a freezer for a while, and it passes
> selftest and drives everything. Replacing the ($£*! expensive) DACs
> solved it for a day or three.
>
>
> Next suspect is some 74BHCT574s. Why 74BHCT? What's so great about
> 74bhct? What replaces them?
>
>
Sorry - It was the lighting and the fact that I'm going blind & senile.
It is actually 74BCT - some bright idea of Texas Instruments for Bus
applications. And it actually wasn't the problem at all - I have worked
it down now to a PAL :-((. I'll have to be nice to the manufacturer :-(.
--
With best Regards,
Declan Moriarty.
--
Author: Declan Moriarty
INET: [EMAIL PROTECTED]
Fat City Hosting, San Diego, California -- http://www.fatcity.com
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