In general, semiconductors are packaged with wiring (wire bonds or substrates) connected to the silicon (so-called die) up to the pins.
In other words, there is a wiring between the die and the pins, and this effect causes a difference in waveforms between at Pin and at Die.
Specifically, on the IBIS model, the wiring is defined as
- L_pkg (inductance)
- R_pkg (resistance)
- C_pkg (capacitance)
, so this effect causes the difference.
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Category: Mentor
Tools: HyperLynx®
Device: -