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