UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): April 25, 2005

SILICON LABORATORIES INC.

(Exact Name of Registrant as Specified in Charter)

4635 Boston Lane, Austin, TX 78735

(Address of Principal Executive Offices) (Zip Code)

Registrant’s telephone number, including area code: (512) 416-8500

Not Applicable

(Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

ITEM 2.02. RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On April 25, 2005, Silicon Laboratories Inc. issued a press release describing its results of operations for its fiscal quarter ended April 2, 2005.  A copy of the press release is attached as Exhibit 99 to this report.

ITEM 5.02 DEPARTURE OF DIRECTORS OR PRINCIPAL OFFICERS; ELECTION OF DIRECTORS; APPOINTMENT OF PRINCIPAL OFFICERS

Effective as of April 25, 2005, Daniel Artusi has resigned as president and chief executive officer and from the board of directors to pursue other interests.

Navdeep S. Sooch, chairman of the board of directors, has been named as interim chief executive officer, effective as of April 25, 2005.  Mr. Sooch co-founded Silicon Laboratories in August 1996 and has served as Chairman of the Board since its inception.  Mr. Sooch served as our Chief Executive Officer from Silicon Laboratories’ inception through the end of fiscal 2003. From March 1985 until founding Silicon Laboratories, Mr. Sooch held various positions at Crystal Semiconductor/Cirrus Logic, a designer and manufacturer of integrated circuits, including Vice President of Engineering, as well as Product Planning Manager of Strategic Marketing and Design Engineer. From May 1982 to March 1985, Mr. Sooch was a Design Engineer with ATTBell Labs. Mr. Sooch is 42 years old and he holds a B.S. in electrical engineering from the University of Michigan, Dearborn and a M.S. in electrical engineering from Stanford University.

ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS

(c) Exhibits.

99  Press Release of Silicon Laboratories Inc. dated April 25, 2005.

Use of Non-GAAP Financial Information

From time to time, Silicon Laboratories provides certain non-GAAP financial measures as additional information relating to its operating results.  The non-GAAP financial measurements provided in the press release furnished herewith do not replace the presentation of Silicon Laboratories’ GAAP financial results. These additional measurements merely provide supplemental information to assist investors in analyzing Silicon Laboratories’ financial position and results of operations; however, these measures are not in accordance with, or an alternative to, GAAP and may be different from non-GAAP measures used by other companies. Silicon Laboratories has chosen to provide this information to investors because it believes that such supplemental information enables them to perform meaningful comparisons of past, present and future operating results, and as a means to highlight the results of core ongoing operations.

Pursuant to the requirements of Regulation G, we have provided in the press release furnished with this report a reconciliation of the non-GAAP financial measures to the most directly comparable GAAP financial measures.

The information in Item 2.02 of this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  The information contained therein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by Silicon Laboratories, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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EXHIBIT INDEX

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Exhibit 99

SILICON LABORATORIES REPORTS TEN PERCENT REVENUE GROWTH IN THE FIRST QUARTER

AUSTIN, Texas – April 25, 2005 – Silicon Laboratories Inc. (Nasdaq: SLAB), a leader in high-performance, analog-intensive, mixed-signal ICs, today reported revenues of $105 million for the first quarter of 2005, a ten percent increase over the fourth quarter.  First quarter fully diluted GAAP earnings per share increased 29 percent sequentially to $0.31.  The company also announced that Daniel Artusi has resigned as president and chief executive officer and from the board of directors to pursue other interests.  Nav Sooch, chairman of the board of directors, was named as interim chief executive officer.

Financial Results

GAAP operating income for the first quarter was $19.8 million dollars or 19 percent of revenue.  Excluding a $753,000 non-cash charge for amortization of deferred stock compensation and a $1.4 million foreign government grant related to our 2004 research and development expenditures, adjusted operating income for the first quarter was $19.1 million dollars, representing 18 percent of revenue.   The company ended the quarter with cash and short-term investments up $27 million to $304 million.  The reconciling charges are set forth in the reconciliation of GAAP to non-GAAP financial measures table included below.

Business Summary

“I would like to thank Dan for his many contributions to Silicon Laboratories.  Under his leadership, Silicon Laboratories expanded globally, diversified and established a strong foundation for future growth,” said Nav Sooch, chairman and interim chief executive officer. “The business remains very healthy, and I am especially pleased with the strong business fundamentals.  We will continue to operate the business with a focus on new products, expanding markets and long-term growth.”

-more-

During the quarter, the broad-based mixed-signal business posted stronger than expected growth and mobile handset revenues rebounded.  The company announced advanced modem technology and new networking clock ICs to expand market share in existing markets.  The company also recently announced an FM tuner family, expanding Silicon Laboratories’ presence in handset and portable devices, as well as the first in a suite of products addressing the large and growing power market.

Mobile handset revenues increased by nine percent during the quarter.  Aero^® II, the industry’s most integrated RF transceiver for handsets, ramped quickly into production as customer adoption accelerated.

The company anticipates revenue of $105 to $108 million in the second quarter of 2005.

Conference Call Today

A conference call discussing the first quarter results will follow the release at 4:15 p.m. Eastern Time.  An audio webcast will be available simultaneously on Silicon Laboratories’ website under Investor Relations (www.silabs.com).  A replay will be available after the call at the same website listed above or by calling 888-446-2545 (U.S.) or +1 402-998-1344 (international). These replays will be available through May 9, 2005.

About Silicon Laboratories Inc.

Silicon Laboratories Inc. is a leading designer of high-performance, analog-intensive, mixed-signal integrated circuits (ICs) for a broad range of applications.  Silicon Laboratories’ diverse portfolio of highly integrated, patented solutions is developed by a world-class engineering team with decades of cumulative expertise in cutting-edge mixed-signal design.  The company has design, engineering, marketing, sales and applications offices throughout North America, Europe and Asia. For more information about Silicon Laboratories please visit www.silabs.com.

Cautionary Language

This press release contains forward-looking statements based on Silicon Laboratories’ current expectations. The words “believe,” “estimate,” “expect,” “intend,” “anticipate,” “plan,” “project,” “will” and similar phrases as they relate to Silicon Laboratories are intended to identify such forward-looking statements. These forward-looking statements reflect the current views and assumptions of Silicon Laboratories and are subject to various risks and uncertainties that could cause actual results to differ materially from expectations. Among the factors that could cause actual results to differ materially from those in the forward-looking statements are the following: risks that Silicon Laboratories may not be able to maintain its historical growth; quarterly fluctuations in revenues and operating results; volatile stock price; average selling prices of products may decrease significantly and rapidly, especially for mobile handset products; dependence on a limited number of products and customers; risks associated with shifting market demand from GSM/GPRS to EDGE and WCDMA; difficulties developing new products that achieve market acceptance; risks that Silicon Laboratories may not be able to manage strains associated with its growth; dependence on key personnel; difficulties managing our manufacturers and subcontractors; difficulties managing international activities; credit risks associated with our accounts receivable; geographic concentration of manufacturers, assemblers, test service providers and customers in the Pacific Rim that subjects Silicon Laboratories’ business and results of operations to risks of natural disasters, epidemics, war and political unrest; product development risks; inventory-related risks; intellectual property litigation risks; risks associated with acquisitions, including the acquisition of Cygnal Integrated Products; the competitive and cyclical nature of the semiconductor industry and other factors that are detailed in Silicon Laboratories’ filings with the SEC. Silicon Laboratories disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Note to editors: Silicon Laboratories, Aero and the Silicon Laboratories logo are trademarks of Silicon Laboratories Inc. All other product names noted herein may be trademarks of their respective holders.

CONTACT: Silicon Laboratories Inc., Shannon Pleasant, 512/464-9254 investor.relations@silabs.com

Silicon Laboratories Inc.
Unaudited Condensed Consolidated Statements of Income
(in thousands, except per share data)

Unaudited Reconciliation of GAAP to Non-GAAP Financial Measures
(in thousands, except per share data)

Silicon Laboratories Inc.
Condensed Consolidated Balance Sheets
(in thousands, except per share data)

Certain prior period amounts have been reclassified to conform to the current period presentation.

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