W48S111-14
W48S111-14 is Spread Spectrum Desktop/Notebook System Frequency Generator manufactured by Cypress.
PRELIMINARY
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 d B
- 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: ............................
