****************************************************************************** ********************* IBIS GOLDEN PARSER BUG REPORT FORM ********************* ****************************************************************************** INSTRUCTIONS To report a bug in the IBIS golden parser. Please fill out the top part of the following form and send the complete form to ibis-bug@eda.org. A list of reported bugs will be maintained on eda.org. ****************************************************************************** PARSER VERSION NUMBER: 5.0.4 PLATFORM (SPARC, HP700, PC, etc.): ALL OS AND VERSION:ALL REPORTED BY: PRABHAT RANJAN, STMicroelectronics Pvt Ltd DATE: December 14, 2010 DESCRIPTION OF BUG: IBISCHK is taking wrong values as reference (calculated from combined I/V tables) for FALLING [Ramp] dV values and showing false Cautions. It is using same values (calculated from I/V tables for Rising [Ramp] dV values ) for both [Ramp] dV as shown below in 2nd and 3rd Caution by IBISCHK5. IBISCHK5 V5.0.4 Checking bug123.ibs for IBIS 5.0 Compatibility... C1514 - [Ramp] dV ( 1.356V) not within 5% of I-V table dV ( 1.281V) calculation: Model BUFFER: Process: TYP: Ramp dV (Falling) C1514 - [Ramp] dV ( 2.177V) not within 5% of I-V table dV ( 1.177V) calculation: Model BUFFER: Process: MIN: Ramp dV (Rising) C1514 - [Ramp] dV ( 2.228V) not within 5% of I-V table dV ( 1.177V) calculation: Model BUFFER: Process: MIN: Ramp dV (Falling) C1514 - [Ramp] dV ( 1.491V) not within 5% of I-V table dV ( 1.382V) calculation: Model BUFFER: Process: MAX: Ramp dV (Falling) Errors : 0 Cautions: 4 File Passed INSERT IBIS FILE DEMONSTRATING THE BUG: [IBIS Ver] 5.0 [File Name] bug123.ibs [File Rev] 1.0 [Source] STMicroelectronics NV [Component] DV_RAMP_TEST [Manufacturer] STMicroelectronics NV | [Package] | variable typ min max R_pkg 52.0m 45.0m 60.0m L_pkg 6.0nH 5.0nH 7.0nH C_pkg 2.3pF 2.0pF 2.5pF | [Pin] signal_name model_name 1 1 BUFFER | ********************************************************************** [Model] BUFFER Model_type 3-state Polarity Non-Inverting Enable Active-Low C_comp 2.07080pF 2.01490pF 2.15460pF Vmeas = 1.25V [Temperature Range] 25.0 125.0 -40.0 [Voltage Range] 2.5V 2.25V 2.75V [Pullup] -2.5V 128.50000mA 148.49000mA 108.34000mA 0V -800.00000fA -40.00000pA 0.00000A 80.0mV -10.33300mA -11.69287mA -9.33970mA 200.0mV -24.81700mA -28.04384mA -22.44200mA 290.0mV -34.89800mA -39.38882mA -31.57800mA 320.0mV -38.11200mA -42.99781mA -34.49500mA 360.0mV -42.28600mA -47.67681mA -38.28600mA 430.0mV -49.28600mA -55.50279mA -44.65400mA 450.0mV -51.21600mA -57.65479mA -46.41300mA 2.5V -121.12998mA -134.74745mA -107.54000mA 5.0V -127.09100mA -139.89000mA -113.63100mA [Pulldown] -2.5V -104.92500mA -119.36500mA -96.86400mA 0V 5.00000pA 290.00000pA 400.00000fA 80.0mV 16.16501mA 17.09052mA 16.18900mA 200.0mV 38.47401mA 40.43049mA 38.58800mA 240.0mV 45.34801mA 47.57548mA 45.47300mA 270.0mV 50.30601mA 52.71948mA 50.42300mA 320.0mV 58.17901mA 60.87747mA 58.23500mA 430.0mV 73.65501mA 76.93945mA 73.24800mA 2.5V 121.15000mA 129.97576mA 113.29000mA 5.0V 125.69100mA 132.67200mA 120.02000mA | [Ramp] dV/dt_r 1.28152V/199.65511ps 2.17682V/249.34089ps 1.38236V/175.23845ps dV/dt_f 1.35649V/303.43329ps 2.22827V/345.96883ps 1.49074V/249.29176ps R_load = 50.0 | [Rising Waveform] R_fixture = 50.0 V_fixture = 0V V_fixture_min = 0V V_fixture_max = 0V 0s 70.07285nV 2.40109uV 8.40628nV 3.30ns 2.13587V 1.96137V 2.30393V 3.31ns 2.13587V 1.96137V 2.30393V | [Falling Waveform] R_fixture = 50.0 V_fixture = 2.5V V_fixture_min = 2.25V V_fixture_max = 2.75V 0s 2.50000V 2.25000V 2.75000V 3.74ns 239.18032mV 202.87547mV 265.43654mV 3.75ns 239.18032mV 202.87547mV 265.43654mV [End] ****************************************************************************** ******************** BELOW FOR ADMINISTRATION AND TRACKING ******************* ****************************************************************************** BUG NUMBER: 123 SEVERITY: [FATAL, SEVERE, MODERATE, ANNOYING, ENHANCEMENT] MODERATE PRIORITY: [HIGH, MEDIUM, LOW] MEDIUM STATUS: [OPEN, CLOSED, WILL NOT FIX, NOT A BUG] CLOSED FIXED VERSION: Version 5.0.6 FIXED DATE: March 17, 2011 NOTES ON BUG FIX: Classified at the IBIS teleconference meeting on January 7, 2011. To be fixed in a later release. Fixed Partially in Version 5.0.5, but the Open_drain and Open_source models still had problems. These were fixed and checked in Version 5.0.6. The ECL configurations were checked and seem to be satisfactory. However, This needs further investigation. Checked with Version 5.0.6. ****************************************************************************** ******************************************************************************