Functional Description
The CY2280 is a Spread Spectrum clock synthesizer/driver for a Pentium II, or other similar processor-based PC requiring 100-MHz support. All of the required system clocks are provided in a space-saving 48-pin SSOP package. The CY2280 can be used with the CY231x for a total solution for systems with SDRAM.

Features
• Mixed 2.5V and 3.3V operation
• Clock solution for Pentium® II, and other similar processor-based motherboards
   — Four 2.5V CPU clocks up to 100 MHz
   — Eight 3.3V sync. PCI clocks, one free-running
   — Two 3.3V 48-MHz USB clocks
   — Three 3.3V Ref. clocks at 14.318 MHz
   — Two 2.5V APIC clocks at 14.318 MHz or PCI/2
• EMI control
   — Spread spectrum clocking
   — Factory-EPROM programmable spread spectrum margin
   — Factory-EPROM programmable output drive and slew rate
• Factory-EPROM programmable CPU clock frequencies for custom configurations
• Available in space-saving 48-pin SSOP package