74ALVCH16821 20-bit bus-interface D-type flip-flo.
74ALVCH16821DGG - 20-bit bus-interface D-type flip-flop
74ALVCH16821 20-bit bus-interface D-type flip-flop; positive-edge trigger; 3-state Rev. 3 — 2 February 2018 Product data sheet 1 General descript.