In small bowl, combine cracker crumbs and sugar; stir in butter. Press into a greased 8-in. square baking dish; set aside.
In a mixing bowl, beat cream cheese and sugar until smooth. Beat in eggs and vanilla just until blended; pour over crust. Bake at 350 degrees F for 15-20 minutes or until almost set. Cool for 1 hour on a wire rack. Refrigerate for 8 hours or overnight.
Spoon pie filling over top.