General Description
The ICS9214 clock generator provides the necessary clock signals to support the Rambus XDRTM memory subsystem and Redwood logic interface. The clock source is a reference clock that may or may not be modulated for spread spectrum. The ICS9214 provides 4 differential clock pairs in a space saving 28-pin TSSOP package and provides an off-the-shelf high-performance interface solution.

FEATUREs
• 400 – 500 MHz clock source
• 4 open-drain differential output drives with short term jitter < 40ps
• Spread spectrum compatible
• Reference clock is differential or single-ended, 100 or 133 MHz
• SMBus programmability for:
    - frequency multiplier
    - output enable
    - operating mode
• Supports frequency multipliers of: 3, 4, 5, 6, 8, 9/2, 15/2 and 15/4
• Support systems where XDR subsystem is asynchronous to other system clocks
• 2.5V power supply