FPGA --> TTL Buffer

@aoedogg-li5wdT • Oct 26, 2024

Oct 26, 2024

1.4K

Hi Everyone,

I need to interface a 3.3v FPGA board with some 5v components - in both directions (i.e FPGA -> TTL and vice versa)

Currently i am looking at this device to do it: #-Link-Snipped-#

From my understanding it is bidirectional and will suit my needs..

is this correct, or would i need 2 separate devices?

Thanks for all your help!

Like 0 Replies 10

Replies

Welcome, guest

Join CrazyEngineers to reply, ask questions, and participate in conversations.

CrazyEngineers powered by Jatra Community Platform

$---Jay---$

@jay-1u4PsD • Jan 30, 2009

u can use transceiver buffers.....it'll convert the signal to FPGA level...
use this device SN74LVC8T245 😁

0
Aoedogg

@aoedogg-li5wdT • Jan 30, 2009

Cheers,

Can this work from the FPGA to TTL level?

0
$---Jay---$

@jay-1u4PsD • Jan 30, 2009

yes dude. we are using this chip for our boards.

0
Aoedogg

@aoedogg-li5wdT • Jan 30, 2009

cheers bro, thanks for the help....

0
Aoedogg

@aoedogg-li5wdT • Jan 31, 2009

Hi,

Just to clarify on one point, would i set the IO standard on the FPGA to LVCMOS for use with this buffer? , also, is the device 5v tolerant on its IOpins?

Thanks!

0
bakshay

@bakshay-vALVar • Feb 1, 2009

hi jay
i am working on VHDL you have some knowledge of it

0
$---Jay---$

@jay-1u4PsD • Feb 1, 2009

u pls confirm to the datasheet about setting the voltage....but dont worry about fpga pins, u assign all the outputs as LVCMOS 3.3v while assigning UCF to ur design......

0
$---Jay---$

@jay-1u4PsD • Feb 1, 2009

hai bakshay, yeah i do have knowledge...how can i help u...?

0
bakshay

@bakshay-vALVar • Mar 22, 2009

thnx for replying JAY
i was not able to reply u , as i was getting my doubts cleard ..
my program for ADC was not working and yet it is not working

0
rajani2509

@rajani2509-HcoGrs • Aug 4, 2011

Hi,
I need to interface a 3.3v FPGA board with some 5v components - in both directions (i.e FPGA -> TTL and vice versa) can I use 74LV244?

0