Re: 3.3V-5V level ****fters

kevin93 wrote:
> On Sep 24, 5:26 pm, Joerg <notthisjoerg...@[EMAIL PROTECTED]
>
> wrote:
>> What's the jelly-bean level ****fter du jour, the most popular?
>>
> ...
>> The topper is a comment in the TXB spec, "OE should be tied to GND
>> through a pulldown resistor; the minimum value of the resistor is
>> determined by the current-sourcing capability of the driver" That
driver
>> is obviously on the chip. Duh! Of course they also forgot what to do if
>> not needed. Pull up? Leave open? Who knows. Well, maybe they had a
>> kegger the night before ...
> ...
> 
> I think they are trying to explain that if you are driving the enable
> from another device (not necessarily a 74LVC4245) you need to put a
> pull-down on the enable to guarantee that it remains low (and thus the
> 74LVC4245 remains in high-z) during power transitions.  It is not
> related to any characteristic of the 74LVC4245 itself.
> 

It wasn't the LVC spec, that one is not stellar either but ok. Sometimes 
I wonder if anyone proof-reads these things. But I am not surprised. 
Right after getting my degree I met an alumni somewhere at an air****t or 
railways station . He had received his masters about the same time but 
had never done any hobby projects, IOW his knowledge base was all from 
books and professors. "Hey, what are you doing these days?" ... "Hire on 
at a big semiconductor manufacturer" ... "What are you doing there?" ... 
"Writing application notes". I almost froze.

-- 
Regards, Joerg

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