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CY28405OC-2T Datasheet(PDF) 1 Page - SpectraLinear Inc |
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CY28405OC-2T Datasheet(HTML) 1 Page - SpectraLinear Inc |
1 / 48 page Clock Synthesizer with Differential SRC and CPU Outputs CY28405-2 Rev 1.0, November 22, 2006 Page 1 of 16 2200 Laurelwood Road, Santa Clara, CA 95054 Tel:(408) 855-0555 Fax:(408) 855-0550 www.SpectraLinear.com Features • Supports Intel Pentium® 4-type CPUs • Selectable CPU frequencies • 3.3V power supply • Nine copies of PCI clocks • Four copies of 3V66 with one optional VCH • Two copies 48-MHz clock • Three differential CPU clock pairs • One differential SRC clock • Support SMBus/I2C Byte, Word and Block Read/ Write • Ideal Lexmark Spread Spectrum profile for maximum electromagnetic interference (EMI) reduction • 48-pin SSOP package Note: 1. Signals marked with [*] and [**] have internal pull-up and pull-down resistors, respectively. CPU SRC 3V66 PCI REF 48M x 3 x 1 x 4 x 9 x 2 x 2 Block Diagram Pin Configuration SSOP-48 VDD_REF XTAL PLL Ref Freq XOUT XIN VDD_PCI OSC SCLK PLL 1 I2C Logic VDD_48MHz SDATA VDD_3V66 Divider Network VDD_CPU FS_(A:B) PD# REF(0:1) VTT_PWRGD# IREF 3V66_(0:2) PCIF(0:2) PCI(0:5) DOT_48 3V66_3/VCH 2 PLL2 CPUT(0:1, ITP), CPUC(0:1, ITP) VDD_SRCT SRCT, SRCC USB_48 *FS_A/REF_0 *FS_B/REF_1 XIN XOUT VSS_REF PCIF0 PCIF1 PCIF2 VDD_PCI VSS_PCI PCI0 PCI1 PCI2 PCI3 VDD_PCI VSS_PCI PCI4 PCI5 PD# DOT_48 USB_48 VSS_48 VDD_48 VDDA VSSA VDD_SRC SRCT SRCC VSS_SRC CPUT0 CPUC0 VDD_CPU CPUT1 CPUC1 VSS_CPU CPUT_ITP CPUC_ITP SCLK* SDATA* 3V66_0 VTT_PWRGD# IREF VDD_3V66 3V66_2 3V66_3/VCH 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 VDD_REF 3V66_1 VSS_3V66 * 100k Internal Pull-up [1] |
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