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): July 30, 2008

SILICON LABORATORIES INC.

(Exact Name of Registrant as Specified in Charter)

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

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):

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

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

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

¨ 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 July 30, 2008, Silicon Laboratories Inc. (“Silicon Laboratories”) issued a press release describing its results of operations for its fiscal quarter ended July 5, 2008.  A copy of the press release is attached as Exhibit 99 to this report.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits.

99  Press Release of Silicon Laboratories Inc. dated July 30, 2008.

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 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.

2

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.

3

EXHIBIT INDEX

4

Exhibit 99

SILICON LABORATORIES REPORTS OUTSTANDING QUARTERLY
PERFORMANCE

—Company Grows Revenue by 38 Percent, More than Doubles Earnings and Exceeds Non-GAAP
Operating Income Target—

AUSTIN, Texas – July 30, 2008 – Silicon Laboratories Inc. (Nasdaq: SLAB), a leader in high-performance, analog-intensive, mixed-signal integrated circuits (ICs), today reported better than expected second quarter revenue of $104.6 million, a 38 percent increase over the same period last year. The company more than doubled quarterly earnings per share when compared to the same quarter last year and achieved non-GAAP operating income of 27 percent, which is above the company’s target model.

Financial Results

The company delivered favorable results across the board during the second quarter. Revenue of $104.6 million exceeded the company’s upward guidance revision and represented a seven percent sequential increase. GAAP gross margin was 63.1 percent, GAAP operating income increased by 64 percent sequentially to $18.2 million, and GAAP diluted earnings per share from continuing operations increased significantly to $0.29.

The following non-GAAP results exclude non-cash charges for stock compensation. Non-GAAP gross margin of 63.5 percent was considerably above the company’s target range of 60 to 62 percent. Operating expenses were slightly lower than expected, resulting in non-GAAP operating income of $28.3 million or 27 percent of revenue, demonstrating very strong operating performance. It also marks a near tripling of non-GAAP operating income from the same period last year. Non-GAAP diluted earnings per share from continuing operations were $0.47, representing a greater than 20 percent sequential increase. The reconciling charges are set forth in the financial measures table included below.

During the second quarter, the company continued execution of its share repurchase program, completing repurchases totaling $33 million bringing the quarter ending cash, cash equivalents and investments balance to $450 million.

“Management is committed to building a business with the valuable combination of growth, profitability and a strong balance sheet,” said Bill Bock, chief financial officer of Silicon Laboratories. “When we last delivered $104 million in quarterly revenue in late 2005 it included the cellular business that we divested last year. We have already achieved the same revenue scale, replacing the volume of the cellular business with other growth products. And, we are considerably more profitable, have more revenue per employee, fewer outstanding shares and an even better cash position.”

Business Summary

Revenue growth in the second quarter was driven primarily by the company’s voice and embedded modem products. Market share expansion and product refresh cycles supporting the transition to high definition set-top boxes were largely behind the sequential gains.

The company’s MCU products had a record quarter, growing double-digits sequentially. The company shipped its one hundred millionth MCU and one hundred thousandth cumulative development kit during the quarter, significant milestones for this rapidly growing business.

Broadcast handset revenue increased, backed by solid design win additions among the top five handset makers. The competitiveness of the company’s broadcast products, the adoption of value added products such as transmitters, AM/FM and embedded antenna tuners and the diversified customer base are all benefiting the business.

“Our ability to deliver top-line growth, well above the industry growth rate, while maintaining an attractive gross margin profile demonstrates the power of a diversified business model based on compelling, differentiated technology,” said Necip Sayiner, president and chief executive officer of Silicon Laboratories. “We increased a number of our product line growth targets for 2008 and

we are seeing new products ramp that we believe will drive growth in 2009.”

The company also announced today the close of the acquisition of Integration Associates, which will add close to 100 engineers and a number of new products to the Silicon Labs portfolio. For the third quarter of 2008, the company is guiding revenue in the range of $111 to $115 million, which includes $5 to $6 million of Integration Associates revenue for the approximate two month stub period of consolidated operations.

Webcast and Conference Call

A conference call discussing the second quarter results will follow this press release today at 7:30 a.m. Central 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 1-800-333-1872 or +1 203-369-3250 (international). Replays will be available through August 13, 2008.

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 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.

Forward Looking Statements

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, dependence on a limited number of products and customers; 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 and divestitures; 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, Silicon Labs and the Silicon Labs 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, shannon.pleasant@silabs.com

Silicon Laboratories Inc.

Condensed Consolidated Statements of Income

(In thousands, except per share data)

(Unaudited)

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)

#  #  #