ZHCSIP0G November   2009  – November 2022 CDC3RL02

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Low Additive Noise
      2. 8.3.2 Regulated 1.8-V Externally Available I/O Supply
      3. 8.3.3 Ultra-Small 8-bump YFP 0.4-mm Pitch WCSP Package
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Input Clock Squarer
      2. 9.1.2 Output Stage
      3. 9.1.3 LDO
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 接收文档更新通知
    2. 10.2 支持资源
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 术语表
  11. 11Mechanical, Packaging, and Orderable Information

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9.2 Typical Application

The CDC3RL02 is ideal for use in mobile applications as shown in Figure 9-2. In this example, a single low noise TCXO system clock source is buffered to drive a mobile GPS receiver and WLAN transceiver. Each peripheral independently requests an active clock by asserting a single clock request line (CLK_REQ_1 or CLK_REQ_2). When both clock request lines are inactive, the CDC3RL02 enters a low current shutdown mode. In this mode, the LDO output, CLK_OUT_1, and CLK_OUT_2 are pulled to GND and the TCXO will be unpowered.

GUID-95A56170-98E4-41BA-939F-2E44C816FA86-low.gifFigure 9-2 Mobile Application

When either peripheral requests the clock, the CDC3RL02 will enable the LDO and power the TCXO. The TCXO output (square wave, sine wave, or clipped sine wave) is converted to a square wave and buffered to the requested output.