CY24271 Rambus XDR Clock Generator Rambus XDR Clock Generator Quad (open drain) differential output drivers Features Supports frequency multipliers: 3, 4, 5, 6, 8, 9/2, 15/2, and 15/4 Meets Rambus Extended Data Rate (XDR) clocking requirements Spread Aware 25 ps typical cycle-to-cycle jitter 2.5 V operation 135 dBc/Hz typical phase noise at 20 MHz offset 28-pin TSSOP package 100 or 133 MHz differential clock input Functional Description 300800 MHz high speed clock support For a complete list of related documentation, click here. Logic Block Diagram /BYPASS EN EN RegA CLK0 CLK0B EN RegB CLK1 Bypass MUX CLK1B EN RegC PLL REFCLK,REFCLKB CLK2 CLK2B EN RegD CLK3 CLK3B SCL SDA ID0 ID1 Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 001-00411 Rev. *H Revised November 20, 2017CY24271 Contents Pinouts ..............................................................................3 Signal Waveforms .......................................................... 13 Pin Definitions ..................................................................3 Jitter .................................................................................14 Functional Overview ........................................................4 Ordering Information ...................................................... 15 PLL Multiplier ...............................................................4 Ordering Code Definitions ......................................... 15 Device ID and SMBus Device Address .......................4 Package Drawing and Dimension ................................. 16 Modes of Operation .....................................................5 Acronyms ........................................................................17 SMBus Protocol ...........................................................6 Document Conventions ................................................. 17 Input Clock Signal .......................................................6 Units of Measure ....................................................... 17 SMBus Data Byte Definitions ......................................6 Document History Page ................................................. 18 Absolute Maximum Conditions .......................................8 Sales, Solutions, and Legal Information ...................... 19 DC Operating Conditions .................................................8 Worldwide Sales and Design Support ....................... 19 DC Electrical Specifications ............................................9 Products ....................................................................19 Thermal Resistance ..........................................................9 PSoC Solutions ...................................................... 19 AC Operating Conditions ...............................................10 Cypress Developer Community ................................. 19 AC Electrical Specifications ..........................................11 Technical Support ..................................................... 19 Test and Measurement Setup ........................................12 Document Number: 001-00411 Rev. *H Page 2 of 19