X0202 4 2004-12-03 0 0000890394 MONOLITHIC SYSTEM TECHNOLOGY INC mosy 0001166403 FU CHIEH HSU 1020 STEWART DRIVE C/O MONOLITHIC SYSTEM TECHNOLOGY, INC. SUNNYVALE CA 94085 1 1 0 0 President, CEO & Chairman BOD Common Stock 2004-12-03 4 S 0 80000 4.64 D 160000 I Held by Trust Common Stock 2004-12-03 4 S 0 80000 4.64 D 160000 I Held by Trust The reported sales of Common Stock were made pursuant to a plan intended to comply with Rule 10b5-1 (c) under the Securities Exchange Act of 1934, as amended.Dr. Hsu also has direct ownership of 2,320,000 shares and indirect ownership of 20,000 shares owned of record by Percy Alexander Hsu and 20,000 shares owned of record by Jerone Lee Hsu. Dr. Hsu disclaims beneficial ownership of all the shares of which he is the indirect owner. Fu-Chieh Hsu 2004-12-06