General Description

The ICS9248-61 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.

- 7 PCI(3.3V) @ 33.3MHz (Includes one free running).

- 2 REF clks Fixed (3.3V) 48MHz at 14.318MHz.

Skew characteristics:

- CPU – CPU<175ps

- PCI – PCI < 250ps

- PCI_E (early) – PCI = 2.1ns

- 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.