W2350EP Datasheet, PDF (10/12 Pages) Keysight Technologies – High Speed Digital Design

IBIS I/O models
IBIS (I/O Buffer Information Speciica-
tion) is an industry-standard speciica-
tion for modeling input and outputs of
digital circuits. Semiconductor vendors
may create IBIS models for their parts
and distribute them for use in any IBIS-
compatible simulator. IBIS simulation
provides faster simulation as compared
with equivalent-circuit SPICE models.
Using IBIS models, the nonlinear
effects of integrated circuit I/O buffers
can be modeled faster and more
precisely, using vendor-supported
information. Keysight representatives
on the EIA IBIS committees contribute
to and track these evolving standards,
and help keep Keysight EEsof EDA
tools up-to-date.
Recent advances include the addition
of the algorithmic modeling interface
(AMI) for vendor-speciic IC models of
SerDes signal processing blocks like
pre-emphasis, equalization, and CDR.
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4
2
0
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0 20 40 60 80 100
Figure 11. Comparison of received on-chip time-domain waveform and
its source waveform.
Unlike the traditional low (which is
based on Transient Simulator), this
additional AMI low is based Channel
Simulator, which is much faster.
Figure 12. IBIS model palette and schematic showing time-domain simulation of IBIS models, package traces, and nonlinear transistor
devices based on ASIC and S-parameter models.
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