Subject: A question for IBIS data

From: [email-masked]
Date: Wed, 11 Apr 2001 10:24:04 -0400

Moo-yeul,

The voltages in the V-t waveforms represent the output voltages of the DUT.
The node these voltages are taken from is the output node.  The question is
what were the loading conditions in which the data was taken and did it
include package parasitics.  The sub-parameters:

L_fixture, R_fixture, V_fixture, C_fixture

specify the loading conditions in which the V-t data was taken.  The
sub-parameters:

L_dut, R_dut, C_dut

specify the package parasitics that are included in the V-t data taken.

If the above subparameters are not included in the IBIS datasheet then the
V-t data was taken at a node that does not include packaging or a load.
The effect of c_comp is included in the V-t data.

See pgs42-44 of the 3.2 spec.

Adam Tambone