W137 - Cypress Semiconductor

W137 Bx Notebook System Frequency Synthesizer

CPU Clock Outputs 0 and 1: These two CPU clock outputs are controlled by the CPU_STOP# control pin. Output voltage swing is controlled by voltage applied to VDDQ2. Frequency is selected per Table 1. PCI Bus Clock Outputs 1 through 5: These five PCI clock outputs are controlled by the PCI_STOP# control pin. Output voltage swing is controlled by voltage applie.

Features

• Maximized EMI suppression using Cypress’s Spread Spectrum Technology
• Two copies of CPU output
• Six copies of PCI output (Synchronous w/CPU output)
• One 48-MHz output for USB support
• One selectable 24-/48-MHz output
• Two Buffered copies of 14.318-MHz input reference signal
• Supports 100-MHz or 66-MHz CPU operation
• Power management control input pins
• Available in 28-pin SSOP (209 mils)
• SS function can be disabled
• See W40S11-02 for 2 SDRAM DIMM support PCI_F, PCI1:5 Output to Output Skew:... 500 ps PCI_F, PCI1:5 Cycle to Cycle Jitter: ...