General Description

The ICS9248-185 is the single chip clock solution for Notebook designs using the 440BX or the VIA Apollo Pro 133 style chipset. It provides all necessary clock signals for such a system. The ICS9248-185 provides CPU and PCI clocks with continous spread spectrum. The ICS9248-185 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations.

Features:

• Up to 133MHz frequency support

• Support power management: PCI_STOP & CLK_STOP

• Spread spectrum for EMI control (-0.5 down spread).

• Uses external 14.318MHz crystal

• FS pins for frequency select

Output Features:

• 2 - CPUs @ 2.5V

• 5 - SDRAM @ 3.3V

• 3 - PCI @ 3.3V,

• 1 - 48MHz, @ 3.3V fixed.

• 2 - REF @ 3.3V, 14.318MHz.