The ICS83940D is a low skew, 1-to-18 LVPECLto-LVCMOS/LVTTL Fanout Buffer and a member HiPerClockSTM of the HiPerClockSTM family of High Performance Clock Solutions from ICS. The ICS83940D has two selectable clock inputs. The PCLK, nPCLK pair can accept LVPECL, CML, or SSTL input levels. The LVCMOS_CLK can accept LVCMOS or LVTTL input levels. The low impedance LVCMOS/LVTTL outputs are designed to drive 50 series or parallel terminated transmission lines.