Date: Fri Aug 15 2014 - 15:17:51 PDT
Hi Arpad, Thanks for your quick response. FYI, operating voltage of this device is -0.7V - 3.6V. Instantaneous open refer to the current remain constant with voltage applied. For example, by looking at the PD curve, the measurement result(DDR Qual) shows the current remain constant at 1.8V-3.9V. Do you think the measurement result(DDR Qual) is valid for the PD part? Instantaneous short refer to the current shoot up with a slight voltage changes. I am not worry on this as this happened at diode region. Thanks, Ai Heong From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Muranyi, Arpad Sent: Friday, August 15, 2014 2:09 PM To: ibis-users@eda.org Subject: [IBIS-Users] RE: IBIS Correlation Issues on IV Part Ai Heong, Could you please explain what you mean by "instantaneous open/short"? I don't quite understand your terminology... Thanks, Arpad ===================================================================== From: owner-ibis-users@eda.org<mailto:owner-ibis-users@eda.org> [mailto:owner-ibis-users@eda.org] On Behalf Of Tan, Ai-Heong Sent: Friday, August 15, 2014 3:58 PM To: ibis-users@eda.org<mailto:ibis-users@eda.org> Subject: [IBIS-Users] IBIS Correlation Issues on IV Part Hi EXPERTS, Currently, I am performing IV curve measurement for a flash package (SOIC16 package). I am using Source Measurement Unit (SMU Keithley 4200), DC Power Supply (Keithley 2230-30-1), Arbitrary Waveform Generator (AWG Tektronix 5200C), and a 4 layer PCB breakout board for the setup. The flash package was placed in a socket which soldered on top of the PCB breakout board. Then, the AWG is used to perform the programming/triggering on the flash device in order to generate a HIGH / LOW output waveform. The SMU is connected to the output of the flash device and I sweep the voltage from -0.7V - 3.6V (operating region of the flash). Please refer to the figure below for the IV curve measurement on the Pullup and Pulldown which I overlapped it with the IBIS model result. I observed there were an instantaneous open happened at the region 1.8 - 3.3V for the Pulldown result of each IO. May I know why this happened and how to solve it. Besides, can everyone please advise on the quality of the IBIS model and any constructive suggestions/comments for improvement are appreciated sincerely. Thanks and I hope to hearing from you soon. [cid:image001.png@01CFB6EA.25EBDA10][cid:image002.jpg@01CFB6EA.AE8CF6B0] Best Regards, Ai Heong -- This message has been scanned for viruses and dangerous content by MailScanner<http://www.mailscanner.info/>, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by MailScanner<http://www.mailscanner.info/>, 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 mikelabonte@eda-stds.org |or ibis-request@eda-stds.org | |IBIS reflector archives exist under: | | http://www.eda-stds.org/ibis/email_archive/ Recent | http://www.eda-stds.org/ibis/users_archive/ Recent | http://www.eda-stds.org/ibis/email/ E-mail since 1993
