SILICON LABORATORIES INC. — Director's Dealing 2012

May 2, 2012

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: SILICON LABORATORIES INC (SLAB)
CIK: 0001038074
Period of Report: 2012-04-27

Reporting Person: Downing Mark A (Sr Vice President, Broad Based)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock, $0.0001 par value	24720	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Non-Qualified Stock Option (right to buy)	$37.44	2017-07-23	Common Stock, $0.0001 par value (63756)		Direct

Footnotes

F1: Includes 21,014 restricted stock units (RSUs) that will entitle Reporting Person to receive one share of common stock per RSU. 8,607 RSUs will vest on February 15, 2013, 5,817 RSUs will vest on February 15, 2014, 3,592 RSUs will vest on February 15, 2015, and 2,998 RSUs will vest on April 15, 2015. All RSUs will be settled pursuant to the terms of the Issuer's 2009 Stock Incentive Plan.

F2: Option vests and becomes exercisable with respect to (i) twenty percent (20%) of the option shares upon the date exercisable and (ii) the balance of the option shares in a series of forty-eight (48) successive monthly installments over the forty-eight (48) month period measured from the date exercisable.