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 *
MUCHONEY MARY S
   2. Issuer Name and Ticker or Trading Symbol
LITTELFUSE INC /DE [LFUS] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Corporate Secretary
(Last)
(First)
(Middle)
800 EAST NORTHWEST HIGHWAY		 3. Date of Earliest Transaction (Month/Day/Year)
08/22/2006
(Street)

DES PLAINES, IL 60016		 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 08/22/2006   A   1,800 A $ 20.24 4,800 D  
Common Stock 08/22/2006   D   1,800 D $ 34.5 3,000 D  
Common Stock 08/22/2006   A   500 A $ 20.125 3,500 D  
Common Stock 08/22/2006   D   500 D $ 34.5 3,000 D  

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
Stock Option (Right to Buy) $ 20.24 08/22/2006   M     600 05/02/2004 05/02/2013 Common Stock 600 $ 20.24 0 D  
Stock Option (Right to Buy) $ 20.24 08/22/2006   M     600 05/02/2005 05/02/2013 Common Stock 600 $ 20.24 0 D  
Stock Option (Right to Buy) $ 20.24 08/22/2006   M     600 05/02/2006 05/02/2013 Common Stock 600 $ 20.24 0 D  
Stock Option (Right to Buy) $ 20.24             05/02/2007 05/02/2013 Common Stock 600   600 D  
Stock Option (Right to Buy) $ 20.24             05/02/2008 05/02/2013 Common Stock 600   600 D  
Stock Option (Right to Buy) $ 20.125 08/22/2006   M     400 04/30/2000 04/30/2010 Common Stock 400 $ 20.125 0 D  
Stock Option (Right to Buy) $ 20.125 08/22/2006   M     100 04/30/2001 04/30/2011 Common Stock 100 $ 20.125 300 D  
Stock Option (Right to Buy) $ 20.125             04/30/2002 04/30/2012 Common Stock 400   400 D  
Stock Option (Right to Buy) $ 20.125             04/30/2003 04/30/2013 Common Stock 400   400 D  
Stock Option (Right to Buy) $ 20.125             04/30/2004 04/30/2014 Common Stock 400   400 D  
Stock Option (Right to Buy) $ 19             04/26/1997 04/26/2011 Common Stock 2,000   2,000 D  
Stock Option (Right to Buy) $ 23             04/25/1998 04/25/2012 Common Stock 2,000   2,000 D  
Stock Option (Right to Buy) $ 25.25             05/01/1999 05/01/2013 Common Stock 2,000   2,000 D  
Stock Option (Right to Buy) $ 35.5             04/28/2001 04/28/2015 Common Stock 3,000   3,000 D  
Stock Option (Right to Buy) $ 27.1             04/27/2002 04/27/2016 Common Stock 3,000   3,000 D  
Stock Option (Right to Buy) $ 25.2             04/26/2003 04/26/2017 Common Stock 3,000   3,000 D  
Stock Option (Right to Buy) $ 38.11             04/30/2005 04/30/2014 Common Stock 3,000   3,000 D  
Stock Option (Right to Buy) $ 27.21             05/06/2006 05/06/2015 Common Stock 3,000   3,000 D  
Stock Option (Right to Buy) $ 34.33             05/05/2007 05/05/2013 Common Stock 3,000   3,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
MUCHONEY MARY S
800 EAST NORTHWEST HIGHWAY
DES PLAINES, IL 60016		       Corporate Secretary  

Signatures

 Mary S. Muchoney   08/22/2006
**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).

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