[SI-LIST] Re: Fw: HELP LVDS LINE

David, there are multiple requirements:

* You will want to match the two signals in each pair  at a minimum to 
guarantee skew does not ever exceed Tr or Tf min. 
* The match between any data pair and the clock pair must be close 
enough to guarantee Tsu, and Th

Steve.
david stern wrote:
>
>
>
>
>
>
> Hello
> Ihave two questions that I need help:
>  
> 1)  I have 5 differential lines one of them is clock running at 60MHz.
> I am at the layout stage. the five pairs should be at the same length.
> But actually they don't have the same length. What is the maximum difference 
> in
> length that I can accept and how do I calculate it?
>  
> 2) Those signals are deserialized into 28 lines. Are those lines should be 
> ROUTED with the same length? What is the maximum difference in
> length that I can accept and how do I calculate it?
>  
> Thank you
>  
> David
>
>
>
>       
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> http://www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>
> List technical documents are available at:
>                 http://www.si-list.net
>
> List archives are viewable at:     
>               http://www.freelists.org/archives/si-list
> or at our remote archives:
>               http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
>               http://www.qsl.net/wb6tpu
>   
>
>
>   


-- 
Steve Weir
Teraspeed Consulting Group LLC 
121 North River Drive 
Narragansett, RI 02882 

California office
(866) 675-4630 Business
(707) 780-1951 Fax

Main office
(401) 284-1827 Business 
(401) 284-1840 Fax 

Oregon office
(503) 430-1065 Business
(503) 430-1285 Fax

http://www.teraspeed.com
This e-mail contains proprietary and confidential intellectual property of 
Teraspeed Consulting Group LLC
------------------------------------------------------------------------------------------------------
Teraspeed(R) is the registered service mark of Teraspeed Consulting Group LLC

------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field


List technical documents are available at:
                http://www.si-list.net

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu

Other related posts: