ICS9250-22 - Frequency Generator for P IV™ - ICST 数据手册 ( 数据表 )

General Description
The ICS9250-22 is a single chip clock solution.
Spread spectrum typically reduces system EMI by 8dB to 10dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9250-22 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations.

FEATUREs:
• Support power management: Power Down Mode
• Supports Spread Spectrum modulation: 0 to -0.5% down spread.
• Uses external 14.318MHz crystal
• Select logic for Differential Swing Control, Test mode, Tristate, Power down, Spread Spectrum, limited frequency select, selective clock enable.
• External resistor for current reference
• FS pins for frequency select

Output Features:
• 4 Differential CPU Clock Pairs @ 3.3V
• 2 - 3V MREF clocks for memory reference seeds, (separate single ended but 180 degrees out of phase)
• 4 - 66MHz reference output
• 10 - 3V 33MHz PCI clocks
• 2 - 48MHz clocks
• 2 - 14.318 reference output

Recommended Application:
  P IV Chipset Support