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

On Sep 26, 2:46=A0am, Joerg <notthisjoerg...@[EMAIL PROTECTED]
>
wrote:
> ....
> ....  Design -> layout ->
> production. No breadboarding at all.

Come to think of it, I have not used any breadboarding for my designs
either last 20 years or so... I had stopped breadboarding for some
time back then when SMT came in and made breadboarding impractical
anyway :-).

> ....
> > You must have overlooked something there. OE should be an input
> > only - must be held low for the drivers to be open - the drivers on
> > the 16 data pins, that is. Drive it high and all get tristated.
>
> Not quite. Quote "When the output-enable (OE) input is low, all outputs
> are placed in the high-impedance state. To ensure the high-impedance
> state during power up or power down, 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."
>
> Low is tri-state. Then further down, quote: "The TXB0104 is designed so
> that the OE input circuit is supplied by VCCA."

Oh I thought you were referring to the x245, I just don't know that
TXB0104 thing, my mistake.

Didi

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Dimiter Popoff               Transgalactic Instruments

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Original message:
http://groups.google.com/group/sci.electronics.design/msg=
/4f9c2278d0270a7f?dmode=3Dsource