SCHS371H November   2009  – October 2024 CDC3RL02

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Low Additive Noise
      2. 7.3.2 Regulated 1.8V Externally Available I/O Supply
      3. 7.3.3 Ultra-Small 8-bump YFP 0.4mm Pitch WCSP Package
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Input Clock Squarer
      2. 8.1.2 Output Stage
      3. 8.1.3 LDO
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.2.2 Detailed Design Procedure

The designer must verify that all parameters are within the ranges specified in Recommended Operating Conditions.

Each device which receives a clock output from the CDC3RL02 must have the CLK request pin connected to the appropriate CLK_REQ pin on the CDC3RL02. This pin enables the output buffer when a device requests the clock signal.

Control of the clock outputs is possible by using a GPIO from a controller to control the CLK_REQ pins.

If one of the outputs is unused, then tie the CLK_REQ and CLK_OUT pins to ground. If the user wants a CLK_OUT pin always enabled, tie the paired CLK_REQ pin to an external 1.8V source (not VLDO because the LDO output is not enabled until at least one CLK_REQ pin is high).