part no suggestion required

Muthukumar Gopalsamy

Prodigy 60 points

I have a host FPGA board

It communicate to target SoC via adaptor board which has FMCP one side and HSMC other side.

The total trace distance would be ~50cm between FGPA and SoC

The FPGA IO's are connected to SoC

kindly let me know whether we need buffer or driver for the same

do we need any buffer or driver between them if so why and at what distance we need to place them

Any part reference from TI which can solve this

over 2 years ago

0 Brian Zhou over 2 years ago

TI__Guru*** 146695 points

Hi Muthukumar :

Is this USB application?

Best

Brian

0 Muthukumar Gopalsamy over 2 years ago in reply to Brian Zhou

Prodigy 60 points

0 Brian Zhou over 2 years ago in reply to Muthukumar Gopalsamy

TI__Guru*** 146695 points

Muthukumar:

What is data rate for your application?

Best

Brian

0 Muthukumar Gopalsamy over 2 years ago in reply to Brian Zhou

Prodigy 60 points

we have 2 types of requirement

1. just gpio maybe like enable signals or status indicators

2. SPI lines upto 100Mhz clock or 48Mbps rate

0 Brian Zhou over 2 years ago in reply to Muthukumar Gopalsamy

TI__Guru*** 146695 points

Muthukumar:

for 20 in trace, 100Mhz may need redriver or buffer . I will transfer this ticket to TRX group, they may have some low speed LVDS redriver.

Regards

Brian

0 Parker Dodson over 2 years ago in reply to Brian Zhou

TI__Guru 52412 points

Hi Brian,

TRX does not own LVDS (a little bit confusing I understand)- I am moving this thread to the TXP group who covers LVDS to see if we have a good match.

Best,

Parker Dodson

0 Joshua Salinas over 2 years ago in reply to Muthukumar Gopalsamy

TI__Mastermind 23520 points

Hello Muthukumar,

Just for clarification, are you requiring a device that can support 100 MHz (200Mbps) signal or 48 Mbps?

We have LVDS devices capable in reaching those data rates. Please look at LVDS driver (DS90LV011A) and LVDS receiver (DS90LV012A). We also have an app note describing how to use LVDS in SPI communications (TIDUED8).

Regards,

Josh

0 Muthukumar Gopalsamy over 2 years ago in reply to Joshua Salinas

Prodigy 60 points

Hi Joshua Salinas

one of my concern may be addressed by this. I will comeback later after going through all relavent documents

My other concern is not answered i.e for GPIO's

+1 Joshua Salinas over 2 years ago in reply to Muthukumar Gopalsamy

TI__Mastermind 23520 points

Hello Muthukumar,

My apologies for not getting to your GPIO question. For a redriver/buffer use case, I would recommend the SN74AXC4T245. This translator has a current drive of 12 mA and has been used for GPIO applications in the past.

Regards,

Josh

Interface

Interface forum

part no suggestion required

Hi Muthukumar :