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'[EE]: 3.3v and 5v components.'
2000\10\16@054840 by Andrew Seddon

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Hi there..

I am currently designing a board that looks like I am going to need to put a 3.3v flash memory on a 5v processor. I wondered if anybody knew of any IC`s that would convert between the two. I know I could use passives but the I have a whole load of address lines, data lines and control lines and I would prefer not to do it that way. Would simple line drivers driven at 3.3v be Ok??


Thanks all.

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2000\10\16@094357 by Barry King

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Andrew,

One common answer is to use 74LVCxxx logic, which have 5 V tolerant
inputs, and rail to rail output swings.  When powered at 3.3 V, they
are effective level shifters.  Be careful that your noise margin on
guaranteed high and low states is adequate.

You can use the TI web site to get more info on LVC logic
http://www.ti.com  (I think), the data sheets are all there.

> I am currently designing a board that looks like I am going to
> need to put a 3.3v flash memory on a 5v processor. I wondered if
> anybody knew of any IC`s that would convert between the two
...

-Barry.
------------
Barry King
NRG Systems "Measuring the Wind's Energy"
http://www.nrgsystems.com
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