[IBIS-Users] RISING n FALLING

From: lau yy <tok47_at_.....>
Date: Wed Aug 03 2005 - 17:52:07 PDT
Dear ALL,
 
Recently, I building a model and I face aproblem. For my I/O pin, my rising and falling data show as below
 
[Rising Waveform]
R_fixture = 50.0000
V_fixture = 3.0000
V_fixture_min = 2.7000
V_fixture_max = 3.6000
| time           V(typ)              V(min)              V(max)
|
  0.000S          1.8460V             2.0370V             1.7920V
   2.0000nS       2.1155V             2.1130V             2.2380V
   4.0000nS       2.7760V             2.4780V             3.3855V
   6.0000nS       2.9727V             2.6540V             3.5830V
   8.0000nS       2.9970V             2.6930V             3.5985V
  10.0000nS       2.9990V             2.6975V             3.5995V
  12.0000nS       2.9990V             2.6990V             3.6000V
  14.0000nS       3.0000V             2.6990V             3.6000V
 
Q1 : It looks like not starting from around 0V. And same as Falling, it wont fall lower than 1.8V. Is that means my model wrong or the input/output voltage range for the product is small? 
 

Q2: My pullup and pulldown data is started from 0A. But it pass the ibischk3.
 
[Pulldown]
| voltage     I(typ)              I(min)              I(max)
|
  -3.0000       0.000A              0.000A              0.000A
  -2.8000       0.000A              0.000A              0.000A
  -2.6000       0.000A              0.000A              0.000A
 
Thanks
 
 
rdgs
yylau
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