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 *
Lyle David
  2. Issuer Name and Ticker or Trading Symbol
ENTROPIC COMMUNICATIONS INC [ENTR]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Financial Officer
(Last)
(First)
(Middle)
6290 SEQUENCE DRIVE
3. Date of Earliest Transaction (Month/Day/Year)
12/15/2010
(Street)

SAN DIEGO, CA 92121
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 12/15/2010   S(1)   35,447 D $ 11.1735 (2) 0 D  
COMMON STOCK 12/15/2010   M   7,583 A $ 0.4284 7,583 D  
COMMON STOCK 12/15/2010   S(1)   7,583 D $ 11.1735 (2) 0 D  
COMMON STOCK 12/15/2010   M   1,209 A $ 0.4284 1,209 D  
COMMON STOCK 12/15/2010   S(1)   1,209 D $ 11.1735 (2) 0 D  
COMMON STOCK 12/15/2010   M   31,395 A $ 0.4284 31,395 D  
COMMON STOCK 12/15/2010   S(1)   31,395 D $ 11.1735 (2) 0 D  
COMMON STOCK 12/15/2010   M   26,209 A $ 0.4284 26,209 D  
COMMON STOCK 12/15/2010   S(1)   26,209 D $ 11.1735 (2) 0 D  
COMMON STOCK 12/15/2010   M   81,760 A $ 1.0491 81,760 D  
COMMON STOCK 12/15/2010   S(1)   81,760 D $ 11.1735 (2) 0 D  
COMMON STOCK 12/15/2010   M   1,844 A $ 1.99 1,844 D  
COMMON STOCK 12/15/2010   S(1)   1,844 D $ 11.1735 (2) 0 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
INCENTIVE STOCK OPTION (RIGHT TO BUY) $ 0.4284 12/15/2010   M     7,583   (3) 08/19/2015 COMMON STOCK 7,583 $ 0 58,813 D  
INCENTIVE STOCK OPTION (RIGHT TO BUY) $ 0.4284 12/15/2010   M     1,209   (4) 08/19/2015 C0MM0N STOCK 1,209 $ 0 57,604 D  
INCENTIVE STOCK OPTION (RIGHT TO BUY) $ 0.4284 12/15/2010   M     31,395   (4) 08/19/2015 COMMON STOCK 31,395 $ 0 26,209 D  
INCENTIVE STOCK OPTION (RIGHT TO BUY) $ 0.4284 12/15/2010   M     26,209   (5) 10/13/2016 COMMON STOCK 26,209 $ 0 0 D  
INCENTIVE STOCK OPTION (RIGHT TO BUY) $ 1.0491 12/15/2010   M     81,760   (6) 05/18/2017 COMMON STOCK 81,760 $ 0 11,680 D  
NON-QUALIFIED STOCKOPTION (RIGHT TO BUY) $ 1.99 12/15/2010   M     1,844   (7) 03/19/2018 COMMON STOCK 1,844 $ 0 64,823 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Lyle David
6290 SEQUENCE DRIVE
SAN DIEGO, CA 92121
      Chief Financial Officer  

Signatures

 LANCE W. BRIDGES, AS ATTORNEY-IN-FACT FOR DAVID B. LYLE   12/16/2010
**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) The sales reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 28, 2009.
(2) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.96 to $11.39, per share. The reporting person undertakes to provide to Entropic Communications (the "Company"), any security holder of the Company or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(3) 1/4th of the shares vest one year after the Vesting Commencement Date beginning 8/19/05. 1/48th of the shares vest monthly thereafter over the next three years. The options may be early exercised prior to vesting but any exercised and unvested shares are subject to a right of repurchase on behalf of the Issuer. Additionally, grant is subject to accelerated vesting on the terms and conditions set forth in such individual's Change of Control Agreement.
(4) Vesting began once Reporting Person met certain milestones which occurred on 8/19/05. 1/48th of the shares vest monthly thereafter over the next four years. The options may be early exercised prior to vesting but any exercised and unvested shares are subject to a right of repurchase on behalf of the Issuer. Additionally, grant is subject to accelerated vesting on the terms and conditions set forth in such individual's Change of Control Agreement.
(5) Vesting began once Reporting Person met certain milestones which occurred on 10/13/06. 1/48th of the shares vest monthly thereafter over the next four years. The options may be early exercised prior to vesting but any exercised and unvested shares are subject to a right of repurchase on behalf of the Issuer. Additionally, grant is subject to accelerated vesting on the terms and conditions set forth in such individual's Change of Control Agreement.
(6) 1/4th of the shares vest one year after the Vesting Commencement Date beginning 5/18/07. 1/48th of the shares vest monthly thereafter over the next three years. The options may be early exercised prior to vesting but any exercised and unvested shares are subject to a right of repurchase on behalf of the Issuer. Additionally, grant is subject to accelerated vesting on the terms and conditions set forth in such individual's Change of Control Agreement.
(7) 18,055 of the options will become exercisable on May 15, 2010. The remainder of the options become exercisable in equal monthly installments beginning June 19, 2010 until fully vested on March 19, 2012. Additionally, grant is subject to accelerated vesting on the terms and conditions set forth in such individual's Change of Control Agreement.

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