The ICS9DB102 zero-delay buffer supports PCI Express clocking requirements. The ICS9DB102 is driven by a differential SRC output pair from an ICS CK409/CK410-compliant main clock generator such as the ICS952601 or ICS954101. It attenuates jitter on the input clock and has a selectable PLL Band Width to maximize performance in systems with or without Spread-Spectrum clocking. An SMBus interface allows control of the PLL bandwidth and bypass options, while 2 clock request (OE#) pins make the ICS9DB102 suitable for Express Card applications.