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I have the IBIS models for this SY75603 PCIe clock buffer IC.

However, the available IBIS model is only for the SY75603A with 85 Ω outputs; I'm using the SY75603B with 100 Ω outputs.

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What should I do to get the IBIS model for the 100 Ω output part?

Is there something I can modify in the available IBIS model (SY75603A) so that I can use it for the 100 Ω output part?

ocrdu
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  • There are no IBIS models available for any SY75603 chip. Where did you get it? Why not ask manufacturer for documentation? – Justme Jan 19 '23 at 10:09
  • Looking at section 4.2 of the datasheet, you can likely just add 15Ω to the parasitic resistance value for each output pin. If your IBIS model uses a single package parasitic value instead of separate ones for each pin, it'll be a little more complicated. It's hard to say more without seeing the IBIS model itself. Also, if you're using the IBIS model in a platform which lets you define explicit additional resistors (like SPICE), you can just do that instead. – Ste Kulov Jan 22 '23 at 03:44

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