I downloaded the Cyclone IV IBIS model (cyclone4.zip) from Altera's URL link below. When you check, Package R_pkg, L_pkg, and C_pkg are 4CGX15_F169.

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I downloaded the Cyclone IV IBIS model (cyclone4.zip) from Altera's URL link below. After checking, R_pkg, L_pkg, C_pkg of Package are 4CGX15_F169.

simulation

https://www.altera.com/support/support-resources/download/board-layout-test/ibis/ibs-ibis_index.html

For Cyclone IV, the values of R_pkg, L_pkg, and C_pkg for each package are listed in the Excel file at the URL link below.

Please change it to the value of the target package and use it.
https://www.altera.co.jp/content/dam/altera-www/global/ja_JP/others/patches/ibis/cyclone-iv/cyclone4_rlc.xls

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