W48S111-14

Advance Information W48S111-14 Spread Spectrum Desktop / Notebook System Frequency Generator Features Maximized EMI suppression using IC WORKS’ Spread Spectrum Technology Reduces measured EMI by as much as 10dB I2C programmable to 133MHz Two skew-controlled copies of CPU output SEL100/66# selects CPU frequency (100 or 66.8MHz) Seven copies of PCI output (synchronous w/CPU output) One copy of 14.31818 MHz IOAPIC output One copy of 48MHz USB output Selectable 24/48MHz clock is determined by resistor straps on power up One high drive output buffer that produces a copy of the 14.318MHz reference Isolated core VDD pin for noise reduction Key Specifications Supply Voltages: VDDQ3 = 3.3V±5% VDDQ2 = 2.5V±5% CPU Cycle to Cycle Jitter: 200ps CPU, PCI Output Edge Rate: ≥1V/ns CPU0:1 Output Skew: 175ps PCI_F, PCI1:6 Output Skew: 500ps CPU to PCI Skew: 1.5 - 4.0ns (CPU Leads) REF2X/SEL48#, SCLOCK, SDATA: 250KΩ pull-up Note: Inter...