74LS273 D Flip Flops and 74LS157 2-1 Mux Zachary Ryan zqr100@psu 74LS273 D Flip Flops and 74LS157 2-1 Mux Zachary Ryan zqr100@psu.edu CENBD 452 Fall 2002

74LS157 2-1 Mux Inputs: Strobe, Select, A, B Output: Y Y = A, when Select = 0 Y = B, when Select = 1 Opted to use instead of the 74LS151

74LS273 D Flip Flop Inputs: D, MR, Clock Output: Q When the clock rises the output Q is set equal to the input D MR is the reset

Schematic

Simple Schematic 0 - Load 1 - Hold

Misc 74LS157 Cost: $0.29 Maximum Propagation Delay: 32ns More info: http://www.jameco.com/jameco/Products/ProdDS/47386.pdf Cost: $0.45 Maximum Propagation Delay: 27ns More info: http://www.jameco.com/jameco/Products/ProdDS/46771.pdf