Plot the clamp curves and then ask yourself if this data is reasonable. 0.3+ Amps of current in an input structure? In the active region? Tom Dagostino Teraspeed(R) Labs 13610 SW Harness Lane Beaverton, OR 97008 503-430-1065 tom@teraspeed.com www.teraspeed.com Teraspeed Consulting Group LLC 121 North River Drive Narragansett, RI 02882 401-284-1827 -----Original Message----- From: owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] On Behalf Of Sudarshan Honnudike Sent: Wednesday, March 14, 2007 7:07 AM To: Mandel, Cary Cc: ibis@server.eda.org; ibis-users@server.eda.org; Sudarshan Honnudike Subject: [IBIS-Users] RE: [IBIS] Warning in LVDS Clamp data Hi Cary, Thanks for the inputs. Indeed the cell has on - die termination. I will come back to you if i have any questions. Thanks! 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 "Mandel, Cary" <cary_mandel@mentor.com> Sent by: owner-ibis@server.eda.org 2007-03-14 05:05 PM To "Sudarshan Honnudike" <sudarshan.honnudike@nxp.com> <ibis@server.eda.org> <ibis-users@server.eda.org> cc Subject RE: [IBIS] Warning in LVDS Clamp data Classification 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 -- This message has been scanned for viruses and dangerous content by <http://www.mailscanner.info/> MailScanner, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by <http://www.mailscanner.info/> MailScanner, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by <http://www.mailscanner.info/> MailScanner, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis <optional e-mail address, if different> | subscribe ibis-users <optional e-mail address, if different> | unsubscribe ibis <optional e-mail address, if different> | unsubscribe ibis-users <optional e-mail address, if different> | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993Received on Wed Mar 14 09:43:52 2007
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