Extract the associated symbol files (.asy) into a new folder named CD4000 within the sym directory: C:\Users\[YourName]\Documents\LTspiceXVII\lib\sym\CD4000 .

Practical versions like CD4000_v.lib are often available in project folders from designers like Jacquot-SFE.

There are two primary ways to integrate these files into your simulation. Method 1: Global Installation (Permanent)