3.3V-5V level ****fters

What's the jelly-bean level ****fter du jour, the most popular?

Need to ****ft three sigs 3.3V to 5V and another three 5V to 3.3V. Stuff 
us analog dudes normally don't do. The TXB0104 looks ok, so does the 
74LVC4245. But the specs for both are horrible, incomplete at best. Not 
much in drive levels mentioned, or just for one direction.

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 ...

Here's what seems to qualify as a datasheet these days:
http://focus.ti.com/lit/ds/symlink/txb0104.pdf

VOH and VOL at 20uA. Microamperes! Couldn't believe it.

-- 
Regards, Joerg

http://www.analogconsultants.com/

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