CY28405 Datasheet | Cypress

CK409-pliant Clock Synthesizer Features - Supports Intel Springdale/Prescott (CK409) - Selectable CPU frequencies - 3.3V power supply - Nine copies of PCI clock - Four copies 3V66 clock with one optional VCH - Two copies 48-MHz USB clock - Two copies REF clock - Three differential CPU clock pairs - Dial-A-Frequency® - Supports SMBus/I2C Byte, Word, and Block Read/Write - Ideal Lexmark Spread Spectrum profile for maximum electromagnetic interference (EMI) reduction - 48-pin SSOP package CPU x3 3V66 x4 PCI x9 REF x2 48M x2 Block Diagram Pin Configuration - - FS_A/REF_0 - - FS_B/REF_1 VDD_REF VDD_REF REF[0:1] XIN XOUT VDD_CPU VSS_REF CPUT[0:1,ITP], CPUC[0:1,ITP] - FS_C/PCIF0 - FS_D/PCIF1 - FS_E/PCIF2 VDD_PCI VSS_PCI PCI0 PCI1 VDD_3V66 3V66_[0:2] PCI2 PCI3 VDD_PCI VDD_PCI PCIF[0:2] VSS_PCI PCI[0:5] PCI4 PCI5 RESET#/PD# DOT_48 3V66_3/VCH USB_48 VSS_48 VDD_48MHz VDD_48 DOT_48 USB_48 XIN XOUT XTAL OSC PLL 1 PLL Ref Freq Divider Network FS_[A:E] VTT_PWRGD# IREF SELVCH PLL2 MODE...