Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
FLUKE BRADLEY J
   2. Issuer Name and Ticker or Trading Symbol
SILICON LABORATORIES INC [SLAB] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Vice President
(Last)
(First)
(Middle)
4635 BOSTON LANE		 3. Date of Earliest Transaction (Month/Day/Year)
04/14/2005
(Street)

AUSTIN, TX 78735		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock, $0.0001 par value 04/14/2005   S   4,000 (1) D $ 27.81 59,237 D  
Common Stock, $0.0001 par value               580 I Bradley J. Fluke GRAT
Common Stock, $0.0001 par value 04/14/2005   S   315 (1) D $ 27.67 4,120 I by B. Fluke Trust (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Incentive Stock Option (right to buy) $ 0.25             06/23/1998(3) 06/23/2008 Common Stock, $0.0001 par value 19,309   19,309 (4) D  
Incentive Stock Option (right to buy) $ 1.75             07/20/1999(3) 07/20/2009 Common Stock, $0.0001 par value 9,400   9,400 (5) D  
Incentive Stock Option (right to buy) $ 48.88             04/30/2002(6) 09/20/2010 Common Stock, $0.0001 par value 3,546   3,546 (7) D  
Non-Qualified Stock Option (right to buy) $ 15.44             03/16/2001(8) 03/16/2011 Common Stock, $0.0001 par value 12,875   12,875 (9) D  
Non-Qualified Stock Option (right to buy) $ 22.63             07/18/2001(10) 07/18/2011 Common Stock, $0.0001 par value 13,509   13,509 (11) D  
Non-Qualified Stock Option (right to buy) $ 38.5             08/18/2004(12) 08/18/2013 Common Stock, $0.0001 par value 21,834   21,834 (13) D  
Non-Qualified Stock Option (right to buy) $ 15.1             04/30/2002(6) 09/21/2011 Common Stock, $0.0001 par value 15,666   15,666 (14) D  
Non-Qualified Stock Option (right to buy) $ 48.88             04/30/2002(6) 09/20/2010 Common Stock, $0.0001 par value 8,010   8,010 (15) D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
FLUKE BRADLEY J
4635 BOSTON LANE
AUSTIN, TX 78735		       Vice President  

Signatures

 Bradley J. Fluke   04/15/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Shares sold pursuant to reporting person's 10(b)5-1 plan.
(2) Shares are held in a family trust over which reporting person exercises voting and dispositive control over securities of issuer held in such trust.
(3) Option is immediately exercisable and vests in a series of thirty-six (36) equal monthly installments, beginning April 30, 2002.
(4) On March 24, 2005 options to acquire 17,691 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.
(5) On March 24, 2005 options to acquire 8,600 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.
(6) This option becomes exercisable as it vests in a series of thirty-six (36) equal monthly installments beginning April 30, 2002.
(7) On March 24, 2005 options to acquire 2,591 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.
(8) This option becomes exercisable as it vests in a series of sixty (60) successive equal monthly installments beginning March 16, 2001.
(9) On March 24, 2005 options to acquire 7,125 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.
(10) This option becomes exercisable as it vests in a series of sixty (60) successive equal monthly installments beginning July 18, 2001.
(11) On March 24, 2005 options to acquire 6,491 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.
(12) Option vests and becomes exercisable with respect to (i) twenty percent (20%) of the option shares upon optionee's completion of one year of service measured from the grant date 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 first year anniversary of the grant date.
(13) On March 24, 2005 options to acquire 3,166 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.
(14) On March 24, 2005 options to acquire 14,334 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.
(15) On March 24, 2005 options to acquire 5,853 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.

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