The ICS9220 clock generator provides Programmable clock signals to support the Rambus XDRTMmemory subsystem and Redwood logic interface. The ICS9220 has been optimized for 100MHz reference input that may or may not be modulated for spread spectrum. The ICS9220 provides 2 differential clock pairs in a space saving 28-pin TSSOP package and provides an off-the-shelf high-performance interface solution.