CY2544/CY2548, CY2546 Quad PLL Programmable Clock Generator with Spread Spectrum Quad PLL Programmable Clock Generator Up to nine clock outputs with programmable drive strength Features Glitch free outputs while frequency switching Four fully integrated phase locked loops (PLLs) 24-pin QFN package Input frequency range Commercial and Industrial temperature ranges External crystal: 8 to 48 MHz for CY2544 and CY2546 External reference: 8 to 166 MHz clock Benefits Reference clock input voltage range 2.5V, 3.0V, and 3.3V for CY2548 Multiple high performance PLLs allow synthesis of unrelated frequencies 1.8V for CY2544 and CY2546 Wide operating output frequency range Nonvolatile programming for personalization of PLL frequencies, spread spectrum characteristics, drive strength, 3 to 166 MHz crystal load capacitance, and output frequencies Programmable spread spectrum with center and down Application specific programmable EMI reduction using spread option and Lexmark and Linear modulation profiles spread spectrum for clocks VDD supply voltage options: Programmable PLLs for system frequency margin tests 2.5V, 3.0V, and 3.3V for CY2544 and CY2548 1.8V for CY2546 Meets critical timing requirements in complex system designs Selectable output clock voltages: 2.5V, 3.0V, and 3.3V for CY2544 and CY2548 Suitability for PC, consumer, portable, and networking 1.8V for CY2546 applications Frequency select feature with option to select eight different Capable of Zero PPM frequency synthesis error frequencies over nine clock outputs Uninterrupted system operation during clock frequency Power down, output enable, and SS ON/OFF controls switch Low jitter, high accuracy outputs Application compatibility in standard and low power systems Ability to synthesize nonstandard frequencies with Fractional-N capability Logic Block Diagram CLKIN CLK1 Crossbar XIN/ Bank CLK2 Switch EXCLKIN 1 OSC Output PLL1 CLK3 XOUT Dividers CLK4 and Bank CLK5 2 MUX Drive FS 0 PLL2 CLK6 Strength FS 1 and CLK7 Control Bank FS 2 Control CLK8 3 PLL3 Logic CLK9 (SS) PLL4 (SS) PD /OE SSON Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document : 001-12563 Rev. *G Revised December 21, 2010 + Feedback CY2544/CY2548, CY2546 Contents General Description .........................................................5 Test and Measurement Setup ........................................ 10 Four Configurable PLLs ..............................................5 Voltage and Timing Definitions ..................................... 10 Input Reference Clocks ...............................................5 Recommended Crystal Specification for Multiple Power Supplies ..............................................5 Thru-Hole Package ......................................................... 10 Output Bank Settings ..................................................5 Ordering Information ...................................................... 11 Output Source Selection .............................................5 Possible Configurations ............................................. 11 Spread Spectrum Control ............................................5 Ordering Code Definition ........................................... 12 Frequency Select ........................................................6 Package Drawing and Dimensions ............................... 13 Glitch-Free Frequency Switch .....................................6 Acronyms ........................................................................14 PD /OE Mode .............................................................6 Document Conventions ................................................. 14 Output Drive Strength ..................................................6 Units of Measure ....................................................... 14 Generic Configuration and Custom Frequency ...........6 Document History Page ................................................. 15 Absolute Maximum Conditions .......................................7 Sales, Solutions, and Legal Information ...................... 16 Recommended Operating Conditions ............................7 Worldwide Sales and Design Support ....................... 16 DC Electrical Specifications ............................................8 Products ....................................................................16 AC Electrical Specifications ............................................9 PSoC Solutions ......................................................... 16 Recommended Crystal Specification for SMD Package 9 Document : 001-12563 Rev. *G Page 2 of 16 + Feedback