SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                       Monolithic System Technology, Inc.
                                (Name of Issuer)


                          Common Stock, $0.01 par value
                         (Title of Class of Securities)


                                   609842 10 9
                                  ------------
                                 (CUSIP Number)


                                December 31, 2002
                               ------------------
             (Date of Event Which Requires Filing of this Statement)

     Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

     [ ] Rule 13d-1(b)

     [ ] Rule 13d-1(c)

     [X] Rule 13d-1(d)

     * The information required in the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act, but shall be subject to all other provisions of the Act (however, see
the Notes).








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CUSIP No. 609842 10 9                13G               Page 2 of 4 Pages
------------------------                        --------------------------------





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     1)   Name of Reporting Person
          Fu-Chieh Hsu
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     2)   Check the Appropriate Box if a Member of a Group (See Instructions)
           (a) [ ]
           (b) [ ]
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     3)   SEC Use Only

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     4)   Citizenship or Place of Organization
          United States of America
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     Number of Shares       5) Sole Voting Power  2,993,316
                          ------------------------------------------------------
    Beneficially Owned      6) Shared Voting Power  520,000
                          ------------------------------------------------------
    by Each Reporting       7) Sole Dispositive Power  2,993,316
                          ------------------------------------------------------
       Person with:         8) Shared Dispositive Power   520,000
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     9)   Aggregate Amount Beneficially Owned by Each Reporting Person
          3,513,316
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    10)   Check if the Aggregate Amount in Row (9) Excludes Certain Shares
          [ ] Not applicable.  (See Instructions)
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    11)   Percent of Class Represented by Amount in Row (9)
          11.6%
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    12)   Type of Reporting Person (See Instructions)
          IN
--------------------------------------------------------------------------------

ITEM 1.    (a)  The name of the issuer is Monolithic System Technology, Inc.
                (the "Company").

           (b)  The principal executive offices of the Company are located at
                1020 Stewart Drive, Sunnyvale, California 94085.

ITEM 2.    (a)  The name of the filing person is Fu-Chieh Hsu.

           (b)  The business address for Fu-Chieh Hsu is 1020 Stewart Drive,
                Sunnyvale, California 94085.

           (c)  Fu-Chieh Hsu is a citizen of the United States of America.

           (d)  The title of the class of securities is Common Stock.

           (e)  The CUSIP number of the Common Stock is 609842 10 9.



ITEM 3.    IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(B), OR 13D-2(B) OR
           (C), CHECK WHETHER THE PERSON FILING IS A:

           This statement is being filed pursuant to Rule 13d-1(d).

ITEM 4.    OWNERSHIP.

           According to the Company's Quarterly Report on Form 10-Q filed on
           November 14, 2002, there are 30,200,820 shares of Common Stock issued
           and outstanding as of November 7, 2002.

           (a) Number of shares beneficially owned: 3,513,316

           (b) Percent of class: 11.6%

           (c) Number of shares as to which such person has:

              (i)   Sole power to vote or to direct the vote: 2,993,316

              (ii)  Shared power to vote or to direct the vote: 520,000

              (iii) Sole power to dispose or to direct the disposition of:
                    2,993,316

              (iv)  Shared power to dispose or to direct the disposition of:
                    520,000

              Fu-Chieh Hsu has sole voting and dispositive authority over
              2,790,000 shares which he personally owns (in addition, he may
              purchase up to 203,316 shares pursuant to options exercisable
              within 60 days).

              Fu-Chieh Hsu shares voting and dispositive authority as a trustee
              with co-trustee Adela Lee over 240,000 shares held in trust for
              the benefit of his son, Percy Alexander Hsu (the "Percy Trust");
              he shares voting and dispositive authority as a trustee with
              co-trustee Adela Lee over 240,000 shares held in trust for the
              benefit of his son, Jerone Lee Hsu (the "Jerone Trust"); he is
              deemed to beneficially own 20,000 shares held directly by Percy
              Alexander Hsu; and he is deemed to beneficially own 20,000 shares
              held directly by Jerone Lee Hsu. Fu-Chieh Hsu disclaims beneficial
              ownership of the 240,000 shares held by the Percy Trust, the
              240,000 shares held by the Jerone Trust, the 20,000 shares held by
              Percy Alexander Hsu and the 20,000 shares held by Jerone Lee Hsu
              as he has no economic interest in any of these shares.

ITEM 5.    OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

           Not applicable.

ITEM 6.    OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

           Not applicable.




ITEM 7.    IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
           THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY OR
           CONTROL PERSON.

           Not applicable.

ITEM 8.    IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

           Not applicable.

ITEM 9.    NOTICE OF DISSOLUTION OF GROUP.

           Not applicable.

ITEM 10.   CERTIFICATION.

           Not applicable.

                                    SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

Date:  February 14, 2003

                                 Fu-Chieh Hsu

                                      /s/ Fu-Chieh Hsu
                                 ---------------------------