CY28409 Clock Synthesizer with Differential SRC and CPU Outputs Features • Supports Intel® Pentium® 4-type CPUs • Selectable CPU frequencies • 3.
3V power supply • Ten copies of PCI clocks • Five copies of 3V66 with one optional VCH • Two copies 48-MHz USB clocks • Three differential CPU clock pairs • One differential SRC clock • I2C support with readback capabilities • Ideal Lexmark Spread Spectrum profile for maximum EMI reduction • 56-pin SSOP and TSSOP packages CPU SRC 3V66 PCI REF 48M x3 x1 x 5 x 10 x 2 x 2 Block Diagram XIN XOUT CPU_STP# PCI_STP# FS_[A:B] VTT_PWRGD# IREF ~ XTAL OSC PLL Ref Freq PLL1 Divider Network PLL2 2 PD# SDATA SCLK I2C Logic Pin Configuratio...

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