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 *
SOOCH NAVDEEP S
   2. Issuer Name and Ticker or Trading Symbol
SILICON LABORATORIES INC [SLAB] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
4635 BOSTON LANE		 3. Date of Earliest Transaction (Month/Day/Year)
12/12/2005
(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 12/23/2005   S   15,188 (1) D $ 38.2226 (2) 1,175,881 D  
Common Stock, $0.0001 par value 12/23/2005   S   1,823 (1) D $ 38.2226 (2) 63,131 I By Libra II, L.P. (3)
Common Stock, $0.0001 par value 12/23/2005   S   608 (1) D $ 38.2226 (2) 4,211 I David T. Sooch Trust (4)
Common Stock, $0.0001 par value 12/23/2005   S   608 (1) D $ 38.2226 (2) 4,211 I Kelly A. Sooch Trust (4)
Common Stock, $0.0001 par value 12/23/2005   S   608 (1) D $ 38.2226 (2) 4,211 I Kevin S. Sooch Trust (4)

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
Non-Qualified Stock Option (right to buy) $ 15.1 12/12/2005   G(5) V 20,834   12/21/2005(6) 09/21/2011 Common Stock, $0.0001 par value 20,834 $ 0 (7) 20,834 D  
Non-Qualified Stock Option (right to buy) $ 24.3 12/12/2005   G(5) V 58,334   12/13/2005(8) 06/13/2012 Common Stock, $0.0001 par value 58,334 $ 0 (7) 58,334 D  
Non-Qualified Stock Option (right to buy) $ 33.17 12/12/2005   G(5) V 9,167   01/10/2006(9) 08/10/2014 Common Stock, $0.0001 par value 9,167 $ 0 (7) 9,167 D  
Non-Qualified Stock Option (right to buy) $ 38.5 12/12/2005   G(5) V 5,500   12/18/2005(10) 08/18/2013 Common Stock, $0.0001 par value 5,500 $ 0 (7) 5,500 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SOOCH NAVDEEP S
4635 BOSTON LANE
AUSTIN, TX 78735		   X      

Signatures

 Bruce A. Maurer, Power of Attorney for Navdeep S. Sooch   12/27/2005
**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) Price represents the weighted average selling price. Prices range between $38.14 and $38.35.
(3) These shares are held in a family limited partnership.
(4) These shares are held in a trust for the benefit of the reporting person's children. The reporting person is co-trustee of the trust.
(5) Options were voluntarily gifted to reporting person by reporting person's former spouse.
(6) This option becomes exercisable as it vests in a series of ten (10) successive equal monthly installments. The first installment will vest on December 21, 2005.
(7) Not applicable per instruction 4(c)(iii).
(8) This option becomes exercisable as it vests in a series of seven (7) successive equal monthly installments. The first installment will vest on December 13, 2005.
(9) This option becomes exercisable as it vests in a series of forty-four (44) successive equal monthly installments. The first installment will vest on January 10, 2006.
(10) This option becomes exercisable as it vests in a series of thirty-three (33) successive equal monthly installments. The first installment will vest on December 18, 2005.

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