ICS9342YF-T Datasheet PDF - Integrated Circuit Systems

General Description
The ICS9342 generates all clocks required for high speed PowerPC RISC microprocessor systems. With a zero delay buffer chip such as the ICS9112-17 multiple PCI clock outputs can be generated in phase with PCIREF.
Spread Spectrum may be enabled by driving the SS_EN# pin low. Spread spectrum typically reduces system EMI by 8dB to 10dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9342 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations.

Output Features:
• 12- CPUs @ 3.3V, up to 146MHz
• 1- PCIREF @ 3.3V, up to 73MHz
• 1 - OUT 3.3V, 64MHz
• 1 - OUT/2 3.3V, OUT/2MHz
• 2 - REF @ 3.3V, 14.318MHz

FEATUREs:
• Up to 146MHz frequency support
• Support power management: CPU, PCI stop and power down mode.
• Spread spectrum for EMI control (0 to -0.5%, ± 0.25%).
• Uses external 14.318MHz crystal
• FS pins for frequency select
• Support for industrial temperature range (-40C° to 85C°)

Recommended Application:
   Power PC System Clock