CY2280PVC-21S Cypress Semiconductor Corporation., CY2280PVC-21S Datasheet
CY2280PVC-21S
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CY2280PVC-21S Summary of contents
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Pentium Features • Mixed 2.5V and 3.3V operation • Clock solution for Pentium® II, and other similar pro- cessor-based motherboards — Four 2.5V CPU clocks up to 100 MHz — Eight 3.3V sync. PCI clocks, one free-running — ...
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Pin Configurations REF0 1 REF1 XTALIN 4 5 XTALOUT PCICLK_F 7 PCICLK1 8 V DDPCI 9 PCICLK2 10 11 PCICLK3 PCICLK4 PCICLK5 14 V DDPCI 15 16 PCICLK6 17 ...
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Function Table (-11S Option) SEL100 SEL1 SEL0 SEL_SS (downspread (no spread N N/A ...
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Maximum Ratings (Above which the useful life may be impaired. For user guide- lines, not tested.) Supply Voltage .................................................–0 7.0V Input Voltage ............................................ –0. [4] Operating Conditions Parameter Analog and Digital Supply ...
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Electrical Characteristics Over the Operating Range Parameter Description Notes: 4. Electrical parameters are guaranteed with these operating conditions. 5. Crystal Inputs have CMOS thresholds. 6. Parameter is guaranteed by design and characterization. Not 100% tested in production. [6, 7] Switching ...
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Switching Waveforms Duty Cycle Timing OUTPUT All Outputs Rise/Fall Time OUTPUT CPU-CPU Clock Skew CPUCLK CPUCLK t 5 CPU-PCI Clock Skew CPUCLK PCICLK t 6 PCI-PCI Clock Skew PCICLK PCICLK t 7 CPU-APIC Clock Skew (-21S ...
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Switching Waveforms (continued) APIC-APIC Clock Skew APIC APIC t 9 CPU_STOP CPUCLK (Internal) PCICLK (Internal) PCICLK (Free-Running) CPU_STOP CPUCLK (External) PCI_STOP CPUCLK (Internal) PCICLK (Internal) PCICLK (Free-Running) PCI_STOP PCICLK (External) PWR_DOWN CPUCLK (Internal) PCICLK (Internal) PWR_DWN CPUCLK (External) PCICLK (External) ...
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Spread Spectrum Clocking Spread Spectrum Enabled Description Modulation Frequency Down Spread Margin at the Fundamental Frequency Down Spread Margin at the Fundamental Frequency Document #: 38-07207 Rev. *A Spread Spectrum Disabled Frequency (MHz) Configuration Outputs All (except -1) -11S CPU, ...
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Application Information Clock traces must be terminated with either series or parallel termination normally done. Application Circuit Summary • A parallel-resonant crystal should be used as the reference to the clock generator. The operating frequency and C this ...
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... DDCPU DDAPIC 0.1 F Ordering Information Ordering Code Package Name CY2280PVC-1 CY2280PVC-11S CY2280PVC-21S Document #: 38-07207 Rev 12, 18, 20, 24, 32, 34, 38 15, 19, 21, 33, 48 0.1 F 37, 41, 46 Notes: Each supply pin must have an individual decoupling capacitor. All capacitors must be placed as close to the pins as is possible. ...
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Package Diagram Document #: 38-07207 Rev. *A © Cypress Semiconductor Corporation, 2001. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a ...
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Revision History Document Title: CY2280 100-MHz Pentium PCs Document Number: 38-07207 Issue REV. ECN NO. Date ** 111721 12/16/01 *A 121842 12/14/02 Document #: 38-07207 Rev. *A ® II Clock Synthesizer/Driver with Spread Spectrum for Mobile or Desktop Orig. of ...