Features: • 1 - Differential pair open drain CPU clocks• 1 - Single-ended open drain CPU clock• 13 - SDRAM @ 3.3V• 6 - PCI @3.3V,• 1 - 48MHz, @3.3V fixed.• 1 - 24/48MHz @ 3.3V• 2 - REF @3.3V, 14.318MHz.• Up to 155MHz frequency support• Support ...
ICS9248-114: Features: • 1 - Differential pair open drain CPU clocks• 1 - Single-ended open drain CPU clock• 13 - SDRAM @ 3.3V• 6 - PCI @3.3V,• 1 - 48MHz, @3.3V fixed.• 1 - 24...
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The ICS9248-114 is a main clock synthesizer chip for AMD-K7 based systems with VIA style chipset. This provides all clocks required for such a system. Spread spectrum may be enabled through I2C programming. Spread spectrum typically reduces system EMI by 8dB to 10dB.
This simplifies EMI qualification of the ICS9248-114 without resorting to board design iterations or costly shielding. The ICS9248-114 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and emperature variations.
Serial programming I2C interface of the ICS9248-114 allows changing functions, stop clock programming and frequency selection.