PROSPECTUS SUPPLEMENT Registration No. 333-16591 Filed Pursuant to Rule 424(b)(3) and Rule 424(c) LOGIC DEVICES INCORPORATED Supplement To Prospectus dated January 8, 1997 as supplemented by the Prospectus Supplements dated June 8, 1999 and February 4, 2000 Shares of Common Stock SELLING SHAREHOLDERS From February 14, 2000 through February 29, 2000, Kanter Family Foundation sold an aggregate of 108,000 shares in open market transactions through a registered broker-dealer. Following these sales, no shares of common stock are owned by Kanter Family Foundation. From February 24, 2000 through March 7, 2000, Windy City, Inc. sold an aggregate of 174,900 shares in open market transactions through a registered broker-dealer. Following these sales, 325,100 shares owned by Windy City, Inc. are covered by this prospectus. From February 29, 2000 through March 7, 2000, BRT Partnership sold an aggregate of 74,482 shares in open market transactions through a registered broker-dealer. Following these sales, 170,000 shares owned by BRT Partnership are covered by this prospectus. The date of this Prospectus Supplement is March 8, 2000.