W48S111-14

PRELIMINARY W48S111-14 Spread Spectrum Desktop/Notebook System Frequency Generator Features Key Specifications Maximized EMI suppression using Cypress’s Spread Spectrum Technology Reduces measured EMI by as much as 10 dB I2C programmable to 133 MHz Two skew-controlled copies of CPU output SEL100/66# selects CPU frequency (100 or 66.8 MHz) Seven copies of PCI output (synchronous w/CPU output) One copy of 14.31818-MHz IOAPIC output One copy of 48-MHz USB output Selectable 24-/48-MHz clock is determined by resistor straps on power-up One high-drive output buffer that produces a copy of the 14.318-MHz reference Isolated core VDD pin for noise reduction Supply Voltages:....................................... VDDQ3 = 3.3V±5% VDDQ2 = 2.5V±5% CPU Cycle to Cycle Jitter: .......................................... 200 ps CPU, PCI Output Edge Rate: ......................................... ≥1 V/ns CPU0:1 Output Skew: ............................