ITD1x is a family of inverting internal tristate buffers with active high enable. Logic Symbol Truth Table ITDx E A QN E A QN E A QN LXZ HLH HH L Z = High Impedance HDL Syntax Verilog ITDx inst_name (QN, A, E); VHDL inst_name: ITDx port map (QN, A, E); Pin Loading Pin Name A E QN ITD1 1.0 1..