0001418215-07-000009 4 1 20071208 20071211 20071211 GAY GARY R 0001197845 4 34 000-29823 071297927 512-416-8500 400 W CESAR CHAVEZ AUSTIN TX 78701 SILICON LABORATORIES INC 0001038074 3674 742793174 DE 1231 400 W CESAR CHAVEZ AUSTIN TX 78701 5124168500 400 W CESAR CHAVEZ AUSTIN TX 78701 4 1 primary_doc.xml PRIMARY DOCUMENT