[IBIS-Users] RE: Tolerant IO cell's Supply voltage range.?

Sudarshan,
 
You are indeed correct.  For 5 V tolerant buffers, the clamp tables
would cover a range based on a 5 V supply, to withstand any incoming
high-voltage signals.  The [Pullup] and/or [Pulldown] tables would cover
a range based on the 3.3 V supply.  
 
- Michael Mirmak
  Intel Corp.
  Chair, EIA BIS Open Forum

________________________________

From: Sudarshan Honnudike [mailto:sudarshan.honnudike@nxp.com] 
Sent: Monday, February 12, 2007 21:56
To: ibis-users@server.eda.org; owner-ibis-users@server.eda.org
Subject: Tolerant IO cell's Supply voltage range.?



Hello All, 

I want to know what should be the voltage range for the tolerant cells
for I-V curves like [Gnd Clamp], [Power Clamp], [Pull up] & [Pull down].

I read it from one of the presentation that, say for a 3.3 V functional
5 V tolerant cell the voltage range is from -5V to +10V.  Do what curves
this range applies ?. I dont think this range has to be applied for
[Pull u] and [Pull down] curves as these are basically driver
characteristics 
and maximum they can operate under 3.3V. So is it only for Clamp curves
? 

Please let me know your answers. 

Best Regards,

Sudarshan HN
NXP Semiconductors/CTO /PLT
C-4, Manyata Tech Park, Nagawara
Bangalore-560 045 , India.    
Ph:+91-80-40267073  
Fax: +91-80-4026 7855
seri:sudarsha@inpsblr
E-mail: sudarshan.honnudike@nxp.com
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