CY24292 Four Outputs PCI-Express Clock Generator Four Outputs PCI-Express Clock Generator Features Functional Description 25 MHz Crystal or Clock Input CY24292 is a clock generator device intended for PCI-Express applications. The device includes: four 100 MHz differential Four Differential 100 MHz PCI-Express Clocks clocks with HCSL Compatible outputs for PCI-Express, and one single-ended 25 MHz output. Supports HCSL Compatible Output Levels Using a serially programmable SMBus interface, the CY24292 One Single-ended 25 MHz Output incorporates spread spectrum modulation on all four 100 MHz Spread Spectrum Capability on all 100 MHz PCI-Express Clock outputs. The device incorporates a Lexmark Spread Spectrum Outputs profile for maximum electromagnetic interference (EMI) reduction. The spread feature or individual outputs can also be SMBus Interface with Read Back Capability disabled using the SMBus interface. 32-pin QFN Package For a complete list of related documentation, click here. Operating Voltage 3.3 V Commercial and Industrial Operating Temperature Range Logic Block Diagram VDD PCIE0P (100 MHz) XIN/EXCLKIN PCIE0N Clock Buffer/ (25 MHz) Crystal Oscillator XOUT PCIE1P (100 MHz) PLL Clock PCIE1N Synthesizer, PCIE2P Dividers, Buffers (100 MHz) PCIE2N and SCLK Configuration PCIE3P SDATA (100 MHz) PCIE3N Logic PD RESET 25M (25 MHz) I REF R = 475 Ohms 1% REF GND Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 001-46142 Rev. *G Revised June 27, 2017CY24292 Contents Pin Configuration .............................................................3 Thermal Resistance ........................................................ 11 Pin Definitions ..................................................................3 AC Electrical Characteristics ........................................ 12 Functional Overview ........................................................4 Test and Measurement Setup ........................................ 14 SMBus Serial Data Interface .......................................4 Single-ended Signals ................................................ 14 Data Protocol ...............................................................4 Differential Signals .................................................... 14 Control Registers .........................................................6 Ordering Information ...................................................... 15 Application Information ...................................................8 Ordering Code Definitions ......................................... 15 Crystal Recommendations ..........................................8 Package Diagram ............................................................ 16 Crystal Loading ...........................................................8 Acronyms ........................................................................17 Calculating Load Capacitors .......................................8 Document Conventions ................................................. 17 Current Source (Iref) Reference Resistor ....................8 Units of Measure ....................................................... 17 Output Termination ......................................................8 Document History Page ................................................. 18 PCB Layout Recommendations ..................................9 Sales, Solutions, and Legal Information ...................... 20 Decoupling Capacitors ................................................9 Worldwide Sales and Design Support ....................... 20 PCI-Express Layout Guidelines ......................................9 Products ....................................................................20 HCSL Compatible Layout Guidelines ..........................9 PSoC Solutions ...................................................... 20 Absolute Maximum Ratings ..........................................10 Cypress Developer Community ................................. 20 Recommended Operation Conditions ..........................10 Technical Support ..................................................... 20 DC Electrical Characteristics ........................................11 Document Number: 001-46142 Rev. *G Page 2 of 20