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CY28409

Part Number	CY28409
Manufacturer	Cypress Semiconductor
Description	Clock Synthesizer
Published	Sep 24, 2005
Detailed Description	CY28409 Clock Synthesizer with Differential SRC and CPU Outputs Features • Supports Intel® Pentium® 4-type CPUs • Sele...
Datasheet	CY28409 PDF File

Overview

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 Configuration[1] VDD_REF REF0:1 VDD_CPU CPUT[0:2], CPUC[0:2] VDD_SRC SRCT, SRCC VDD_3V66 3V66_[0:3] VDD_PCI PCIF[0:2] PCI[0:6] 3V66_4/VCH VDD_48MHz DOT_48 USB_48 REF_0 REF_1 VDD_REF XIN XOUT VSS_REF PCIF0 PCIF1 PCIF2 VDD_PCI VSS_PCI PCI0 PCI1 PCI2 PCI3 VDD_PCI VSS_PCI PCI4 PCI5 PCI6 PD...

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