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Backplane logic and 3v3

  • Thread starter Habib Bouaziz-Viallet
  • Start date
H

Habib Bouaziz-Viallet

Jan 1, 1970
0
Hi all,

We are redesigning some 3U/6U Cards inserted in a chassis where
backplane is specified to be driven by ABT logic (74ABT245/244), the
problem we are facing is that the FPGA on some cards has 3v3 only IO's
tolerant.

Anyone here has got an elegant solution for interfacing +5V backplane
(TTL ABT) to 3v3 device such as uP or FPGA's ? We have been looking for
transceivers like 74LVC3245 but after carefully reading the datasheet it
may not fit the ABT technology especially for driving backplane bus line
and capacitive loads...

Thanks in advance for any advice.

Habib
 
H

Habib Bouaziz-Viallet

Jan 1, 1970
0
Le 13/04/2011 18:34, Rob Gaddi a écrit :
then an SN74LVT162245A running from 3.3V has 5V tolerant inputs and will
drive +64/-128 mA. They make vicious VME transceivers
houuuuu ! rrright !! thank you so much for the topic i'll see deeper
those parts tomorrow.

Habib.
 
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