X0202 4 2007-02-15 0 0001038074 SILICON LABORATORIES INC SLAB 0001362672 Walsh Paul V Jr 400 W CESAR CHAVEZ AUSTIN TX 78701 0 1 0 0 VP Principal AccountingOfficer Common Stock, $0.0001 par value 2007-02-15 4 A 0 5000 0.0001 A 22757 D Reflects the grant of restricted stock units that will entitle the Reporting Person to receive one share of common stock per restricted stock unit. The restricted stock units will vest in 3 equal installments on each anniversary date after February 15, 2007 and will be settled pursuant to the terms of the Issuer's 2000 Stock Incentive Plan. Paul V. Walsh 2007-02-20