SCAS892C February   2010  – December 2016 CDCE937-Q1 , CDCEL937-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 Typical Characteristics
  9. 9 Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Control Terminal Setting
      2. 10.3.2 Default Device Setting
    4. 10.4 Device Functional Modes
      1. 10.4.1 SDA and SCL Serial Interface
    5. 10.5 Programming
      1. 10.5.1 Data Protocol
      2. 10.5.2 Command Code Definition
      3. 10.5.3 Generic Programming Sequence
      4. 10.5.4 Byte Write Programming Sequence
      5. 10.5.5 Byte Read Programming Sequence
      6. 10.5.6 Block Write Programming Sequence
      7. 10.5.7 Block Read Programming Sequence
      8. 10.5.8 Timing Diagram for the SDA and SCL Serial Control Interface
      9. 10.5.9 SDA and SCL Hardware Interface
    6. 10.6 Register Maps
      1. 10.6.1 SDA and SCL Configuration Registers
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
        1. 11.2.2.1 Spread-Spectrum Clock (SSC)
        2. 11.2.2.2 PLL Multiplier or Divider Definition
        3. 11.2.2.3 Crystal Oscillator Start-Up
        4. 11.2.2.4 Frequency Adjustment With Crystal Oscillator Pulling
        5. 11.2.2.5 Unused Inputs and Outputs
        6. 11.2.2.6 Switching Between XO and VCXO Mode
      3. 11.2.3 Application Curves
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14Device and Documentation Support
    1. 14.1 Documentation Support
      1. 14.1.1 Related Documentation
    2. 14.2 Related Links
    3. 14.3 Receiving Notification of Documentation Updates
    4. 14.4 Community Resources
    5. 14.5 Trademarks
    6. 14.6 Electrostatic Discharge Caution
    7. 14.7 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

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5 Description (continued)

Furthermore, each output can be programmed in-system for any clock frequency up to 230 MHz through the integrated, configurable PLL. The PLL also supports spread-spectrum clocking (SSC) with programmable down and center spread. This provides better electromagnetic interference (EMI) performance to enable customers to pass industry standards such as CISPR-25.

Customization of frequency programming and SSC are accessed using three user-defined control pins. This eliminates the additional interface requirement to control the clock. Specific power-up and power-down sequences can also be defined to the user's needs.