Use the file ut54lvdm328uc.ibs for UT54LVDS328 LVDS RX receiver differential inputs and single-ended (s.e.) LVCMOS logic inputs IBIS models. DO NOT USE THIS FILE FOR UT54LVDS328 LVDS TX DRIVER OUTPUTS. Use the file ut54lvds217.ibs for UT54LVDS328 LVDS TX driver output IBIS models. DO NOT USE THIS FILE FOR UT54LVDS328 LVDS RX RECEIVER INPUTS OR LVCMOS LOGIC INPUTS.