sn7400.v


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`timescale 1ns/1ps
module sn7400
  #(parameter tPLH = 0, tPHL = 0)
  (input [3:0]	A,
   input [3:0]	B,
   output [3:0]	Y);

   assign #(tPLH, tPHL) Y = ~(A & B);
endmodule