ICS9248F-56-T Datasheet PDF - Integrated Circuit Systems

General Description
The ICS9248-56 is the Main clock solution for Notebook designs using the Intel 440BX style chipset. Along with an SDRAM buffer such as the ICS9179-03, it provides all necessary clock signals for such a system.

FEATUREs
• Generates the following system clocks:
   - 2CPU(2.5V) up to 100MHz.
   - 6 PCI(3.3V) @ 33.3MHz (Includes one free running).
   - 1 REF clks (3.3V) at 14.318MHz.
   - 1 Fixed clock at 48MHz
   - 1 Fixed clock at 48 or 24MHz
• Skew characteristics:
   - CPU – CPU<175ps
   - PCI – PCI < 500ps
   - CPU(early) – PCI = 1.5ns – 4ns.
• Supports Spread Spectrum modulation for CPU and PCI clocks, 0.5% down spread
• Efficient Power management scheme through stop clocks and power down modes.
• Uses external 14.318MHz crystal, no external load cap required for CL=18pF crystal.
• 28 pin 209mil SSOP and 173mil TSSOP