******************************************************************************
********************* 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: 5.0.3

PLATFORM (SPARC, HP700, PC, etc.): PC

OS AND VERSION: Windows 2000

REPORTED BY: Bob Ross, Teraspeed Consulting Group

DATE: July 5, 2010

DESCRIPTION OF BUG:

IBISCHK5 reports fewer Waveform mismatches than past versions for Open_drain
and Open_source models.  The change in performance is obsevers between
ibischk4 Version 4.2.0 and 4.2.1.

In the test case blow where the V_fixture value is changed by 0.1 V,
ibischk3 Version 3.2.9 reports 12 Warnings, but ibischk4 and ibischk5
report 6 Warnings.  There does not appear to be a logical pattern regarding
the unreported Warnings.  They have occurred in some Typ and Max cases.

INSERT IBIS FILE DEMONSTRATING THE BUG:

|************************************************************************
|
[IBIS ver]       3.2 | 4.2 | 5.0   | Works for 3.2, fails with 4.2, 5.0
[File name]      bug119.ibs
[File Rev]       0
[Date]           July 5, 2010 
[Source]         Teraspeed Consulting Group
[Notes]          Single I/O 
|
[Component]      BUG119
[Manufacturer]   ABC
[Package]
| variable       typ                 min                 max
R_pkg            0.0000              0.0000              0.0000
L_pkg            0.0000H             0.0000H             0.0000H
C_pkg            0.0000F             0.0000F             0.0000F
|
[Pin]  signal_name          model_name           R_pin     L_pin     C_pin
1      BUG119_OD            BUG119_OD
2      BUG119_OS            BUG119_OS
|
[Model]          BUG119_OD
Model_type       Open_drain
|
Vmeas =   2.5V
Cref = 0.0000F
Rref =  5000
Vref =  2.5
|
C_comp          0 0 0
|
[Voltage Range]           5.000V              4.500V              5.500V
|
[Pulldown]
| voltage     I(typ)              I(min)              I(max)
|
  -5.00000      -100mA              -100mA              -100mA
  10.00000      200mA               200mA               200mA
|
[Ramp]
| variable       typ                 min                 max
dV/dt_r          1.5/1n      1.35/1n  1.65/1n
dV/dt_f          1.5/1n      1.35/1n  1.65/1n
R_load = 50
|
[Rising Waveform]
R_fixture = 50
V_fixture = 5.1 | 5.0
V_fixture_min = 4.6 | 4.5
V_fixture_max = 5.6 | 5.5
| time           V(typ)              V(min)              V(max)
|
0.0       2.5   2.25   2.75
1e-9      5      4.5   5.5
|
[Falling Waveform]
R_fixture = 50
V_fixture = 5.1 | 5.0
V_fixture_min = 4.6 | 4.5
V_fixture_max = 5.6 | 5.5
| time           V(typ)              V(min)              V(max)
|
0.0       5   4.5   5.5
1e-9      2.5 2.25  2.75
|
[Model]          BUG119_OS
Model_type       Open_source
|
Vmeas =   2.5V
Cref = 0.0000F
Rref =  5000
Vref =  2.5V
|
C_comp          0 0 0
|
[Voltage Range]           5.000V              4.500V              5.500V
|
[Pullup]
| voltage     I(typ)              I(min)              I(max)
|
   5.00000      -100mA              -100mA              -100mA
  -10.00000      200mA               200mA               200mA
|
[Ramp]
| variable       typ                 min                 max
dV/dt_r          1.5/1n      1.35/1n  1.65/1n
dV/dt_f          1.5/1n      1.35/1n  1.65/1n
R_load = 50
|
[Rising Waveform]
R_fixture = 50
V_fixture = 0.1 | 0.0          | Bad V_fixture Values
V_fixture_min = 0.1 | 0.0
V_fixture_max = 0.1 | 0.0
| time           V(typ)              V(min)              V(max)
|
0.0     0     0     0
1e-9    2.5   2.25  2.75
|
[Falling Waveform]
R_fixture = 50
V_fixture = 0.1 | 0.0          | Bad V_fixture Values
V_fixture_min = 0.1 | 0.0
V_fixture_max = 0.1 | 0.0
| time           V(typ)              V(min)              V(max)
|
0.0     2.5   2.25  2.75
1e-9       0     0     0
|
[End]


******************************************************************************
******************** BELOW FOR ADMINISTRATION AND TRACKING *******************
******************************************************************************

BUG NUMBER:  119

SEVERITY: [FATAL, SEVERE, MODERATE, ANNOYING, ENHANCEMENT]  SEVERE

PRIORITY: [HIGH, MEDIUM, LOW]                               MEDIUM

STATUS: [OPEN, CLOSED, WILL NOT FIX, NOT A BUG]             CLOSED

FIXED VERSION:  Version 5.0.4

FIXED DATE:  November 5, 2010

NOTES ON BUG FIX:
   Classified at the IBIS Teleconference meeting on July 9, 2010
   To be fixed in a future release


******************************************************************************
******************************************************************************