General Description
   The ICS9159-20 is a low-cost frequency generator designed specifically for SIS551X chip set and SIS6205 VGA controller. The integrated buffer minimizes skew. A 14.31818 MHz XTAL oscillator provides the reference clock to generate standard Pentium™ frequencies. The CPU clock makes gradual frequency transitions without violating the PLL timing of internal microprocessor clock multipliers.

FEATUREs
• One selectable CPU clocks operate up to 66.66 MHz
• 5 uncommitted buffers
• Maximum CPU jitter of ±200ps
• 7 BUS clocks support sync or async bus operation
• 500ps skew window for all synchronous clock edges
• Integrated buffer outputs drive up to 30pF loads
• 3.1V - 3.5V supply range
• 28-pin 300-mil SOIC package
• Supports chip sets requiring early CPU clocking

APPLICATIONs
• Ideal for green Pentium and P6 PCI systems based on the SIS5596 chip set