ICS9250-12

The ICS9250-12 is a main clock synthesizer chip for pentium based systems using rambus interface DRAMs.This chip provides all the clocks required for such a system when used with a direct rambus clock generator(DRCG)chip such as the ICS9212-01,02,03 and a PCI buffer 9112-17.

Features of the ICS9250-12 are:(1)generates the following system clocks:4CPU clocks(2.5V,100/133MHz);8PCI clocks,including 1 free-running(3.3V,33MHz);2CPU/2 clocks(2.5V,50/66MHz);3IOAPIC clocks(2.5V,16.67MHz);4 fixed frequency 66MHz clocks(3.3V,66MHz);2REF clocks(3.3V,14.318MHz);1USB clock(3.3V,48MHz); (2)efficient power management through PD#,CPU_STOP# and PCI_STOP#; (3)0.5% typical down spread modulation on CPU,PCI,IOAPIC,3V66 and CPU/2 output clocks.; (4)uses external 14.318 MHz crystal.

The absolute maximum ratings of the ICS9250-12 can be summarized as:(1)supply voltage:7.0V; (2)logic inputs:GND-0.5V to VDD+0.5V; (3)ambient operating temperature:0~70; (4)storage temperature:-65~150.If you want to know more information such as the electrical characteristics, please download the datasheet in www.seekic.com or www.chinaicmart.com.