General Description

The ICS9248-78 is a single chip clock for Intel Pentium II. It provides all necessary clock signals for such a system.

Features

• Generates the following system clocks:

- 2 - CPUs @ 2.5V, up to 150MHz.

- 1 - IOAPIC @ 2.5V, PCI/2MHz.

- 9 SDRAMs (3.3V), up to150MHz.

- 2 - 3V66 @ 3.3V, 2x PCIMHz.

- 8 - PCIs @ 3.3V.

- 1 - 48MHz, @ 3.3V fixed.

- 2 - REF @ 3.3V, 14.318Hz.

- 1 - 24MHz, @ 3.3V fixed.

• Supports spread spectrum modulation , down spread 0 to -0.5, –0.25 center spread.

• I2C support for power management.

• Efficient power management scheme through PD#.

• Uses external 14.138 MHz crystal.