library ieee;
use ieee.std_logic_1164.all;

library proasic3e;
use proasic3e.all;

entity OBUFDS is
port ( I  : in  std_logic;
       O  : out std_logic;
       OB : out std_logic);
end OBUFDS;

architecture a of OBUFDS is

COMPONENT OUTBUF_LVDS
    port(
         D    : in  STD_ULOGIC;
         PADP : out STD_ULOGIC;
         PADN : out STD_ULOGIC);
END COMPONENT;

begin

iob: OUTBUF_LVDS port map(D => I, PADP => O, PADN => OB);

end;