W144H
440BX AGPset Spread Spectrum Frequency Synthesizer
Features
Maximized EMI suppression using Cypress’s Spread
Spectrum technology
Single chip system frequency synthesizer for Intel®440BX AGPset
Two copies of CPU output
Six copies of PCI output
One 48-MHz output for USB
One 24-MHz output for SIO
Two buffered reference outputs
One IOAPIC output
Thirteen SDRAM outputs provide support for 3 DIMMs
Supports frequencies up to 150 MHz I2C™ interface for programming
Power management control inputs
Key Specifications
CPU Cycle-to-Cycle Jitter: ......................................... 250 ps
CPU to CPU Output Skew: ........................................ 175 ps
PCI to PCI Output Skew: ............................................ 500 ps
VDDQ3 .................................................................... 3.3V±5%
VDDQ2 .................................................................... 2.5V±5%
SDRAMIN to SDRAM0:11 Delay: ..........................3.7 ns typ.
SDRAM0:11 (leads) to SDRAM_F Skew: ..............0.4 ns typ.
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