[IBIS-Users] RE: [IBIS] V-T data query

Hello, Shantala,
 
This turn on/off difference is probably designed to minimize crowbar current
and power consumption.
 
IBIS 4.x and 5.x require all V-t tables to have the same "reference" time
(same clock edge).  As Arpad noted, the same end time is not required in the
tables.
 
Lynne
 
 
"IBIS training when you need it, where you need it."
 
Dr. Lynne Green
Green Streak Programs
http://www.greenstreakprograms.com
425-788-0412
lgreen22@mindspring.com
 

 

  _____  

From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of shantala
hegde
Sent: Monday, March 23, 2009 6:54 AM
To: ibis-users@eda.org; ibis@eda.org
Subject: [IBIS] V-T data query


Hello all,

I do have one question VT data.
For example if I have an ibis model where [rising] data with voltage source
connected to VDDS is a fast one.But the one which is  connected to ground is
slow rising.

Say ,rising with vdds has 3ns and rising with ground connetced 10ns.

Is this normal scenario or is it mandatory to have approximately same V-T
end point for both rising/falling.

Regards,
Shantala


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