SCES983 October   2025 TXB0604

ADVANCE INFORMATION  

  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 Recommended Operating Conditions
    4. 5.4 Electrical Characteristics
    5. 5.5 Switching Characteristics, VCCA = 0.9V
    6. 5.6 Switching Characteristics, VCCA = 1.2V
    7. 5.7 Switching Characteristics, VCCA = 1.5V ± 0.1V
    8. 5.8 Switching Characteristics, VCCA = 1.8V ± 0.15V
    9. 5.9 Switching Characteristics: Tsk, TMAX (-40°C to 125°C) 
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Architecture
      2. 7.3.2 Input Driver Requirements
      3. 7.3.3 Output Load Considerations
      4. 7.3.4 Enable and Disable
      5. 7.3.5 Pullup or Pulldown Resistors on I/O Lines
      6. 7.3.6 Dummy Cycles
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

7.3.3 Output Load Considerations

TI recommends following careful PCB layout practices to minimize signal distortion and ringing. Impedance matching techniques should be implemented to reduce output oscillations and ensure signal integrity. Series termination resistors are recommended at the device outputs to match the total output impedance to the transmission line.

For example, given that the device output impedance is 21Ω (VCCA = 0.9 to 2V and VCCB = 3.3V), adding a series resistor value of 30Ω provides an effective source impedance close to 50Ω, matching a typical controlled-impedance trace or cable.