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General Description

The ICS9148-32 is a Clock Synthesizer chip for Pentium and PentiumPro CPU based Desktop/Notebook systems that will provide all necessary clock timing.

Features

? Generates system clocks for CPU, IOAPIC, PCI, 14.314 MHz REF , USB, and Super I/O

? Supports single or dual processor systems

? I2C interface

? Supports Spread Spectrum modulation for CPU & PCI clocks, –0.255 Center Spread or 0 to -0.6 Down Spread.

? Skew from CPU (earlier) to PCI clock 1 to 4ns

? CPU cycle to cycle jitter –200ps

? 2.5V or 3.3V output: CPU, IOAPIC

? 3.3V outputs: PCI, REF, 48MHz

? No power supply sequence requirements

? Uses external 14.318MHz crystal, no external load cap required for CL=18pF crystal

? 48 pin 300 mil SSOP