CY28158PVC

PRELIMINARY CY28158 Spread Spectrum Timing Solution for Serverworks Chipset Features • Maximized EMI suppression using Cypress’s spread spectrum technology • Based on Industry Standard CK133 Pinout with all outputs compliant to CK98 specifications • 0.5% downspread outputs deliver up to 10dB lower EMI • 6 skew-controlled copies of CPU output • 6 copies of PCI output (synchronous w/CPU output) • 2 copies of 66 MHz fixed frequency 3.3V clock • 3 copies of 16.67 MHz IOAPIC clock, synchronous to CPU clock • 1 copy of 48 MHz USB output • 2 copies of 14.31818 MHz reference clock • Programmable to 133 or 100 MHz operation • Power management control pins for clock stop and shut down • Available in 56-pin SSOP Table 1. Pin Selectable Frequency SEL133/100# 1 0 CPU0:5 (MHz) 133 100 PCI 33.3 33.3 Key Specifications Supply Voltages: ......................................VDD33 = 3.3V ± 5% .................................................................VDD25 = 2.5V ± 5% CPU Output Jitter: ................................................... .