Date: Mon Nov 13 2006 - 13:37:55 PST
Thanks Tom, So what you are saying is will need to trace this part back to the lot it came form and see if this was a typical lot. As for my other questions? 1part bench test. 27C at min, typ and max operating voltage. Max temp at min, typ and max operating voltage. Min temp at min, typ and max operating voltage. Tim _____ From: Tom Dagostino [mailto:tom@teraspeed.com] Sent: Monday, November 13, 2006 2:24 PM To: kelpin@simtek.com Subject: RE: [IBIS-Users] Spec Clarification Tim We have made many models by measuring sample parts and producing the min and max corners by variations on the temperature and voltage of the sample. The problem with adding a fudge factor to get a wider variation to cover potential process variations is determining where your sample part was in the process spectrum. Was it close to the min, or the max or was it really a typical part? If you apply the scaling factor to a min part you will obviously get a different result than a max part. So, we just model with no additional scaling and label the model as such. Regards, 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 Tim Kelpin Sent: Monday, November 13, 2006 12:40 PM To: ibis-users@server.eda.org Subject: [IBIS-Users] Spec Clarification Dear Madam or Sir: I have been tasked to collect empirical data on one of our parts. I/O Power_clamp, pull_up and Pull_down data collection According to the spec: It is permissible to use typical components and derated by voltage and temp and optionally apply the X% factor. Data can be derived form typical component measured over temp/voltage. What is meant by a typical part? 1. I have acquired 5 random parts from our inventory. I only need to test one part correct? 2. I will then run the Power_clamp, pull_up and Pull_down tests per the spec at Vin min Vin typ and Vin max room temp. 3. Repeat at min temp 4. Repeat at Hi temp. Am I interrupting this correctly? Keep in mind that I have never done modeling or simulations before. This is all new to me. Best Regards, Tim Kelpin Product Engineer Simtek Corporation WORK : (719)590-6546 HOME : (719) 651-2127 -------------------------------------------------------------------- |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 1993
