General Description

The ICS9248-107 is a main clock synthesizer chip for Pentium II based systems using Rambus Interface DRAMs. This chip provides all the clocks required for such a system when used with a zero delay buffer such as the ICS9179-06.

Output Features:

? 4 - CPUs @ 2.5V, up to 180MHz.

? 3 - IOAPIC @ 2.5V

? 3 - 3V66MHz @ 3.3V.

? 11 - PCIs @ 3.3V

? 1 - 48MHz, @ 3.3V fixed

? 1 - 24/48MHz, @ 3.3V

Features:

? Up to 180MHz frequency support

? Use a zero delay buffer such as the ICS9179-06 to generate SDRAM clocks.

? Support power management: Power down Mode from I2C programming.

? Spread spectrum for EMI control ± 0.25 center spread).

? Uses external 14.318MHz crystal

? 5 - FS pins for frequency select

Recommended Application:

RCC chipset