<Page>
EXHIBIT 99.1
SILICON LABORATORIES APPOINTS RUSSELL J. BRENNAN
AS CHIEF FINANCIAL OFFICER
AUSTIN, TEXAS - SEPT. 12, 2002 - Silicon Laboratories Inc. (Nasdaq NM: SLAB),
the mixed-signal IC innovator for the communications industry, announced
effective today that Russell J. Brennan has been appointed chief financial
officer. Mr. Brennan arrives at Silicon Laboratories with strong industry
experience, including 14 years at Analog Devices, Inc. (NYSE: ADI) where he
served most recently as vice president of finance and corporate controller.
His prior experience also includes finance roles at Schlumberger/Fairchild
and Texas Instruments. Mr. Brennan holds a master's in business
administration from New York University Graduate School of Business and a
bachelor's degree from Boston College. Mr. Brennan is a Certified Public
Accountant.
"Russ Brennan is a natural fit with the team at Silicon Labs," said Nav
Sooch, chairman and chief executive officer. "Russ has successfully grown a
finance organization in the mixed-signal analog IC industry from our current
size to one that supports a multi-billion dollar business. His broad
international experience in the semiconductor industry is ideal to support
the growth of Silicon Labs."
John W. McGovern has served as chief financial officer of Silicon Labs since
December, 1996, and guided the company through early capital formation, a
successful initial public offering and years of operations as a public
company. Mr. McGovern has decided to retire from his full-time duties but
plans to remain with the company temporarily in a transitional role.
"I want to thank John for his extraordinary efforts over the last six years
working tirelessly to lead the company through critical growth stages," Mr.
Sooch added. "During this time, John has built a strong finance team,
implemented financial accounting best practices, created a culture of
profitable operations and helped position the company for strong revenue
growth. John's ongoing commitment to help acclimate Russ into his new role to
ensure stability and continuity is greatly appreciated. John has left a
significant legacy of competence and confidence throughout all of our
financial, accounting and administrative activities at Silicon Labs."
-more-
<Page>
SILICON LABORATORIES APPOINTS RUSSELL J. BRENNAN AS CHIEF FINANCIAL OFFICER
PAGE 2
SILICON LABORATORIES INC.
Silicon Laboratories Inc. designs, manufactures, and markets proprietary
high-performance mixed-signal integrated circuits (ICs) for a broad range of
communications markets. Silicon Laboratories is an ISO9001-certified
manufacturer and has applied for more than 145 patents on its mixed-signal
technology. The company was incorporated in 1996 and is based in Austin,
Texas. Additional information about Silicon Labs is available at
WWW.SILABS.COM or through the toll free investor relations line at
1-877-411-SLAB (7522)
CAUTIONARY LANGUAGE
This press release may contain forward-looking statements based on Silicon
Laboratories' current expectations. These forward-looking statements involve
risks and uncertainties. A number of important factors could cause actual
results to differ materially from those in the forward-looking statements.
Silicon Laboratories believes that it is important to communicate the
company's future expectations to investors. However, there may be events in
the future that Silicon Laboratories is not able to accurately predict or
control. For a discussion of these and other factors which could impact
Silicon Labs' financial results and cause actual results to differ materially
from those in the forward-looking statements, please refer to Silicon Labs'
recent filings with the SEC, particularly the Form 10-K filed January 22,
2002 and the Form 10-Q filed July 22, 2002.
# # #
SILICON LABORATORIES' NEWS RELEASES AND PRODUCT INFORMATION MAY BE OBTAINED
VIA THE WORLDWIDE WEB AT HTTP://WWW.SILABS.COM/