General Description

The ICS9148-75 generates all clocks required for high speed RISC or CISC microprocessor systems such as Intel PentiumPro™, AMD™ or Cyrix™. Sixteen different reference frequency multiplying factors are externally selectable with smooth frequency transitions.

Features

• Generates the following system clocks:

- 3 CPU(2.5V/3.3V) up to 100MHz.

- 6 PCI(3.3V) @ 33.3MHz (including one free running PCICLK)

- 3AGP(3.3V) @ 2 x PCI

- 13 SDRAMs(3.3V) up to 100MHz

- 1 REF (3.3V) @ 14.318MHz

- 1 - 48MHz (3.3V) fixed

• Skew characteristics:

- CPU – CPU<250ps

- CPU(early) – PCI : 1-4ns

- AGP – PCI: 250ps

- PCI – PCI <500ps

• Supports Spread Spectrum modulation & I2C programming for Power Management, Frequency Select

• Efficient Power management scheme through power down PCI, AGP and CPU_STOP clocks.

• Uses external 14.318MHz crystal

• 48 pin 300mil SSOP.