SLLSFS0A April   2024  – May 2025 THVD4421

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  ESD Ratings [IEC]
    4. 5.4  Recommended Operating Conditions
    5. 5.5  Thermal Information
    6. 5.6  Power Dissipation
    7. 5.7  Electrical Characteristics
    8. 5.8  Switching Characteristics_RS-485_500kbps
    9. 5.9  Switching Characteristics_RS-485_20Mbps
    10. 5.10 Switching Characteristics, Driver_RS232
    11. 5.11 Switching Characteristics, Receiver_RS232
    12. 5.12 Switching Characteristics_MODE switching
    13. 5.13 Switching Characteristics_RS-485_Termination resistor
    14. 5.14 Switching Characteristics_Loopback mode
    15. 5.15 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Integrated IEC ESD and EFT Protection
      2. 7.3.2 Protection Features
      3. 7.3.3 Receiver Fail-Safe Operation
      4. 7.3.4 Low-Power Shutdown Mode
      5. 7.3.5 On-chip Switchable Termination Resistor
      6. 7.3.6 Operational Data Rate
      7. 7.3.7 Diagnostic Loopback
      8. 7.3.8 Integrated Charge Pump for RS-232
    4. 7.4 Device Functional Modes
      1. 7.4.1 RS-485 Functionality
      2. 7.4.2 RS-232 Functionality
      3. 7.4.3 Mode Control
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Data Rate and Bus Length
        2. 8.2.1.2 Stub Length
        3. 8.2.1.3 Bus Loading
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 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 Device Support
    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

6 Parameter Measurement Information

THVD4421 Measurement of RS-485 Driver Differential Output Voltage With Common-Mode LoadFigure 6-1 Measurement of RS-485 Driver Differential Output Voltage With Common-Mode Load
THVD4421 Measurement of RS-485 Driver Differential and Common-Mode Output With RS-485 LoadFigure 6-2 Measurement of RS-485 Driver Differential and Common-Mode Output With RS-485 Load
THVD4421 Measurement of RS-485 Driver Differential Output Rise and Fall Times and Propagation DelaysFigure 6-3 Measurement of RS-485 Driver Differential Output Rise and Fall Times and Propagation Delays
THVD4421 Measurement of RS-485 Driver Enable and Disable Times With Active High Output and Pull-Down LoadFigure 6-4 Measurement of RS-485 Driver Enable and Disable Times With Active High Output and Pull-Down Load
THVD4421 Measurement of RS-485 Driver Enable and Disable Times With Active Low Output and Pull-up LoadFigure 6-5 Measurement of RS-485 Driver Enable and Disable Times With Active Low Output and Pull-up Load
THVD4421 Measurement of RS-485 Receiver Output Rise and Fall Times and Propagation DelaysFigure 6-6 Measurement of RS-485 Receiver Output Rise and Fall Times and Propagation Delays
THVD4421 Measurement of RS-485 Receiver Enable/Disable Times in Half Duplex ModeFigure 6-7 Measurement of RS-485 Receiver Enable/Disable Times in Half Duplex Mode
THVD4421 Measurement of RS-485 Receiver Enable Time from Shutdown with TX Disabled: Full duplex ModeFigure 6-8 Measurement of RS-485 Receiver Enable Time from Shutdown with TX Disabled: Full duplex Mode
THVD4421 Termination Resistor MeasurementFigure 6-9 Termination Resistor Measurement
THVD4421 Termination Resistor Switching MeasurementFigure 6-10 Termination Resistor Switching Measurement
THVD4421 Time from Shutdown to RS-232 ReadyFigure 6-11 Time from Shutdown to RS-232 Ready
THVD4421 Time to Switch from RS-232 2T2R Mode to RS-485 Full Duplex Mode and BackFigure 6-12 Time to Switch from RS-232 2T2R Mode to RS-485 Full Duplex Mode and Back
THVD4421 Time to Switch from RS-232 Loopback to Normal RS-232 2T2R Mode and BackFigure 6-13 Time to Switch from RS-232 Loopback to Normal RS-232 2T2R Mode and Back
THVD4421 Time to Switch from RS-485 Full Duplex to Half Duplex and BackFigure 6-14 Time to Switch from RS-485 Full Duplex to Half Duplex and Back
THVD4421 RS-232 Driver Prop Delay, Pulse Skew Figure 6-15 RS-232 Driver Prop Delay, Pulse Skew
THVD4421 RS-232 Driver Slew Rate Figure 6-16 RS-232 Driver Slew Rate
THVD4421 RS-232 Receiver Propagation Delay, Pulse Skew Figure 6-17 RS-232 Receiver Propagation Delay, Pulse Skew
THVD4421 RS-232 Receiver Enable and Disable Time Figure 6-18 RS-232 Receiver Enable and Disable Time