SCES641E May   2007  – October 2023 TXB0102

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  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Electrical Characteristics: TA = 25°C
    6. 5.6  Electrical Characteristics: TA = –40°C to +85°C
    7. 5.7  Operating Characteristics
    8. 5.8  VCCA = 1.2 V Timing Requirements
    9. 5.9  VCCA = 1.5 V ± 0.1 V Timing Requirements
    10. 5.10 VCCA = 1.8 V ± 0.15 V Timing Requirements
    11. 5.11 VCCA = 2.5 V ± 0.2 V Timing Requirements
    12. 5.12 VCCA = 3.3 V ± 0.3 V Timing Requirements
    13. 5.13 VCCA = 1.2 V Switching Characteristics
    14. 5.14 VCCA = 1.5 V ± 0.1 V Switching Characteristics
    15. 5.15 VCCA = 1.8 V ± 0.15 V Switching Characteristics
    16. 5.16 VCCA = 2.5 V ± 0.2 V Switching Characteristics
    17. 5.17 VCCA = 3.3 V ± 0.3 V Switching Characteristics
    18. 5.18 Typical Characteristics
  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
    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
      3. 8.2.3 Application Curve
    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 Documentation Support
      1. 9.1.1 Related Documentation
    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

Package Options

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

8.2.2 Detailed Design Procedure

To begin the design process, determine the following:

  • Input voltage range
    • Use the supply voltage of the device that is driving the TXB0102 device to determine the input voltage range. For a valid logic high the value must exceed the VIH of the input port. For a valid logic low the value must be less than the VIL of the input port.
  • Output voltage range
    • Use the supply voltage of the device that the TXB0102 device is driving to determine the output voltage range.
    • TI does not recommend to have the external pullup or pulldown resistors. If mandatory, TI recommends that the value should be larger than 50 kΩ.

  • An external pulldown or pullup resistor decreases the output VOH and VOL. Use Equation 1 and Equation 2 to draft estimate the VOH and VOL as a result of an external pulldown and pullup resistor.
    Equation 1. VOH = VCCx × RPD / (RPD + 4.5 kΩ)
    Equation 2. VOL = VCCx × 4.5 kΩ / (RPU + 4.5 kΩ)

    where

    • VCCx is the output port supply voltage on either VCCA or VCCB
    • RPD is the value of the external pulldown resistor
    • RPU is the value of the external pullup resistor
    • 4.5 kΩ is the counting the variation of the serial resistor 4 kΩ in the I/O line.