ICS9250-19 - Integrated Circuit Systems

ICS9250-19 Frequency Generator & Integrated Buffers

14.318 MHz reference clock output L a t c h e d f r e q u e n cy s e l e c t i n p u t . H a s p u l l - u p t o V D D P C I 14.318MHz reference clock output Halts PCICLK [5:1] at logic "0" level when low. (in mobile, MODE=0) Ground. 14.318MHz input. Has internal load cap, (nominal 33pF). Crystal output. Has internal load cap (33pF) and feedback resistor to .

Features

• 3 - CPUs @2.5V, up to 150MHz.
• 17 - SDRAM @ 3.3V, up to 150MHz.
• 7 - PCI @3.3V
• 2 - IOAPIC @ 2.5V
• 1 - 48MHz, @3.3V fixed.
• 1 - 24MHz @ 3.3V
• 2 - REF @3.3V, 14.318MHz. Features:
• Up to 150MHz frequency support
• Support power management: CPU, PCI, stop and Power down Mode form I2C programming.
• Spread spectrum for EMI control (0 to -0.5%, ± 0.25%).
• Uses external 14.318MHz crystal Key Specifications:
• CPU
  – CPU: <175ps
• CPU
  – PCI: 1 - 4ns
• PCI
  – PCI: <500ps
• SDRAM - SDRAM: <250ps Pin Configuration 56-Pin SSOP Block Diagram
* Internal Pull-up Resistor of 240K to 3.3V on indica.