when vdd=2.5V

Dear IBIS users,

After I create IBIS models (vdd=3.3v) for my i/o buffer, I change vdd to 2.5v and try again. Everthing seems fine expect that at the end of pull-up/pull-down section in IBIS model file, after -2.5v ~ 5.0v sweep, it will add a few lines which I attach here, I try a few buffers and got the same results. I wonder if s2ibis2 can't handle vdd=2.5v?

Thank you for your help!

-------------------------
  -2.50 -0.108A -66.400mA -0.124A
  -2.30 -0.108A -65.600mA -0.125A
    . . . .
    . . . .
    . . . .
    . . . .
   4.80 0.169A 0.173A 0.171A
   5.00 0.192A 0.194A 0.195A
   0.00 1.082e-312A 3.395e-313A 1.401e-312A
   0.00 0.000A 0.000A 0.000A
   0.00 0.000A 0.000A 0.000A
   5.00 0.192A 0.194A 0.195A
-----------------------------

Roy
IDT Inc.
Received on Tue Sep 21 13:22:23 1999