General Description

The ICS9248-128 is the single chip clock solution for Desktop/Notebook designs using the SIS style chipset. It provides all necessary clock signals for such a system.

Features:

• Up to 133MHz frequency support

• Support power management: CPU, PCI, SDRAM stop and Power down Mode from I2C programming.

• Spread spectrum for EMI control ( ± 0.25 center spread & 0 to -0.5 down spread).

• Uses external 14.318MHz crystal

• FS pins for frequency select

Output Features:

• - 3 CPU @ 2.5V/3.3V up to 133.3 MHz.

• - 6 PCI @ 3.3V (including 1 free-running)

• - 13 SDRAMs @ 3.3V up to 133.3MHz.

• - 3 REF @ 3.3V, 14.318MHz

• - 1 clock @ 24/14.3 MHz selectable output for SIO

• - 1 Fixed clock at 48MHz (3.3V)

• - 1 IOAPIC @ 2.5V / 3.3V