RE: [IBIS] Warning in LVDS Clamp data

Hello Sudarshan,
 
The 3rd warning means that, a clamp is allowing as much as 1/3 amp of
current to flow, while the voltage is still within the voltage rails.
This is probably not what you intended, unless, you are incorporating
the electrical charactersitics of an on-die-terminator into the clamps.
 
If you would like to discuss this further, I suggest you contact Mentor
directly - you can email me if you like.
 
Cary Mandel
Mentor Graphics
 

________________________________

From: owner-ibis@server.eda.org [mailto:owner-ibis@server.eda.org] On
Behalf Of Sudarshan Honnudike
Sent: 14 March 2007 11:11
To: ibis@server.eda.org; ibis-users@server.eda.org
Subject: [IBIS] Warning in LVDS Clamp data



Hi IBIS Experts, 

One of my customer is getting the following warning in ICX parser. 

;;    ;;   Warning: Current (0.306459) of summed typical power and
ground clamp curves exceed 0.005 amps in the range between power and
ground.
;;    ;;   Warning: Current (0.274468) of summed minimum power and
ground clamp curves exceed 0.005 amps in the range between power and
ground.
;;    ;;   Warning: Current (0.336667) of summed maximum power and
ground clamp curves exceed 0.005 amps in the range between power and
ground.

While running ibischk4 I didnt get this warning. These warnings i am
getting for LVDS input cell. 

Please also let me know what this warning means. 


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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