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