SNVSCF7A December   2022  – August 2024 TPS3435

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  Thermal Information
    6. 6.6  Electrical Characteristics
    7. 6.7  Timing Requirements
    8. 6.8  Switching Characteristics
    9. 6.9  Timing Diagrams
    10. 6.10 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Timeout Watchdog Timer
        1. 7.3.1.1 tWD Timer
        2. 7.3.1.2 Watchdog Enable Disable Operation
        3. 7.3.1.3 tSD Watchdog Start Up Delay
        4. 7.3.1.4 SET Pin Behavior
      2. 7.3.2 Manual RESET
      3. 7.3.3 WDO Output
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Output Assert Delay
        1. 8.1.1.1 Factory-Programmed Output Assert Delay Timing
        2. 8.1.1.2 Adjustable Capacitor Timing
      2. 8.1.2 Watchdog Timer Functionality
        1. 8.1.2.1 Factory-Programmed Timing Options
        2. 8.1.2.2 Adjustable Capacitor Timing
    2. 8.2 Typical Applications
      1. 8.2.1 Design 1: Monitoring a Standard Microcontroller for Timeouts
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Setting the Watchdog Timeout Period
          2. 8.2.1.2.2 Setting Output Assert Delay
          3. 8.2.1.2.3 Setting the Startup Delay
          4. 8.2.1.2.4 Calculating the WDO Pullup Resistor
        3. 8.2.1.3 Application Curves
    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 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.1.2.2 Adjustable Capacitor Timing

Adjustable tWD timing is achievable by connecting a capacitor to the CWD pin. If this method is used, please consult Equation 1 for calculating typical tWD values using ideal capacitors. Capacitor tolerances cause the actual device timing to vary such that the minimum of tWD can decrease and the maximum of tWD can increase by the capacitor tolerance. For the most accurate timing, use ceramic capacitors with COG dielectric material.