SCES643L November   2006  – February 2026 TXB0108

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 (DGS/RUK/RKS)
    6. 5.6  Electrical Characteristics (Other Packages)
    7. 5.7  Timing Requirements: VCCA = 1.2V
    8. 5.8  Timing Requirements: VCCA = 1.5V ± 0.1V
    9. 5.9  Timing Requirements: VCCA = 1.8V ± 0.15V
    10. 5.10 Timing Requirements: VCCA = 2.5V ± 0.2V
    11. 5.11 Timing Requirements: VCCA = 3.3V ± 0.3V
    12. 5.12 Switching Characteristics: VCCA = 1.2V (DGS/RUK/RKS)
    13. 5.13 Switching Characteristics: VCCA = 1.2V (Other Packages)
    14. 5.14 Switching Characteristics: VCCA = 1.5V ± 0.1V (DGS/RUK/RKS)
    15. 5.15 Switching Characteristics: VCCA = 1.5V ± 0.1V (Other Packages)
    16. 5.16 Switching Characteristics: VCCA = 1.8V ± 0.15V (DGS/RUK/RKS)
    17. 5.17 Switching Characteristics: VCCA = 1.8V ± 0.15V (Other Packages)
    18. 5.18 Switching Characteristics: VCCA = 2.5V ± 0.2V (DGS/RUK/RKS)
    19. 5.19 Switching Characteristics: VCCA = 2.5V ± 0.2V (Other Packages)
    20. 5.20 Switching Characteristics: VCCA = 3.3V ± 0.3V (DGS/RUK/RKS)
    21. 5.21 Switching Characteristics: VCCA = 3.3V ± 0.3V (Other Packages)
    22. 5.22 Operating Characteristics
    23. 5.23 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 Curves
  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

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RUK|20
  • ZXY|20
  • NME|20
  • YZP|20
  • DQS|20
  • DGS|20
  • PW|20
  • RGY|20
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 TXB0108 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 TXB0108 device is driving to determine the output voltage range.
    • Do not recommend having the external pullup or pulldown resistors. If mandatory, it is recommended the value must be larger than 50kΩ.

An external pulldown or pullup resistor decreases the output VOH and VOL. Use the below equations to draft estimate the VOH and VOL as a result of an external pulldown and pullup resistor.

VOH = VCCx × RPD / (RPD + 4.5kΩ)

VOL = VCCx × 4.5kΩ / (RPU + 4.5kΩ)

Where:

  • VCCx is the output port supply voltage on either VCCA or VCCB.
  • RPD is the value of the external pull down resistor.
  • RPU is the value of the external pull up resistor.
  • 4.5kΩ is the counting the variation of the serial resistor 4kΩ in the I/O line. Refer to the Effects of external pullup and pulldown resistors on TXB application note.