0000912057-97-017651 S-8 4 19970514 19970514 NYSE CADENCE DESIGN SYSTEMS INC 0000813672 7372 770148231 DE 1231 S-8 33 333-27109 97605165 555 RIVER OAKS PKWY SAN JOSE CA 95134 4089431234 555 RIVER OAKS PARKWAY SAN JOSE CA 95134 ECAD INC /DE/ 19880609 S-8 1 000091205797017651-001-seq1-s-8.txt FORM S-8 EX-5.1 2 000091205797017651-002-seq2-ex-5-1.txt OPINION OF COOLEY EX-23.1 3 000091205797017651-003-seq3-ex-23-1.txt CONSENT OF ARTHUR ANDERSEN EX-99.4 4 000091205797017651-004-seq4-ex-99-4.txt 1995 DIRECTOR'S STOCK OPTION PLAN