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Integrated Circuit Systems, Inc.
ICS9148-12
Pentium/ProTM System Clock Chip
General Description
The ICS9148-12 is a Clock Synthesizer chip for Pentium and PentiumPro CPU based Desktop/Notebook systems that will provide all necessary clock timing. Features include four strong CPU, seven PCI and eight SDRAM clocks. Two reference outputs are available equal to the crystal frequency. Stronger drive CPUCLK outputs typically provide greater than 1 V/ns slew rate into 20pF loads. This device meets rise and fall requirements with 2 loads per CPU output (ie, one clock to CPU and NB chipset, one clock to two L2 cache inputs). PWR_DWN# pin allows low power mode by stopping crystal OSC and PLL stages.