SLLSF78B December   2020  – October 2021 THVD1400 , THVD1420

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Revision History
  4. 4 Pin Configuration and Functions
  5. 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 Characteristics
    7. 5.7  Electrical Characteristics
    8. 5.8  Switching Characteristics (THVD1400)
    9. 5.9  Switching Characteristics (THVD1420)
    10. 5.10 Typical Characteristics
  6. 6 Parameter Measurement Information
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
  8. 8 Application Information Disclaimer
    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
        4. 8.2.1.4 Receiver Failsafe
        5. 8.2.1.5 Transient Protection
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.2 Detailed Design Procedure

In order to protect bus nodes against high-energy transients, the implementation of external transient protection devices is necessary. Figure 8-5 suggests a protection circuit against 1 kV surge (IEC 61000-4-5) transients. Table 8-1 shows the associated bill of materials.

GUID-D24ED8E1-EADB-4940-999E-8323CF58CEF8-low.gifFigure 8-5 Transient Protection Against Surge Transients for Half-Duplex Devices
Table 8-1 Bill of Materials
DEVICEFUNCTIONORDER NUMBERMANUFACTURER
XCVRRS-485 transceiverTHVD1400TI
R110-Ω, pulse-proof thick-film resistorCRCW0603010RJNEAHPVishay
R2
TVSBidirectional 400-W transient suppressorCDSOT23-SM712Bourns