SCES643K November   2006  – July 2025 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

3 Description

This 8-bit noninverting translator uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.2V to 3.6V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65V to 5.5V. This allows for universal low-voltage bidirectional translation between any of the 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5V voltage nodes. VCCA should not exceed VCCB.

When the output-enable (OE) input is low, all outputs are placed in the high-impedance state.

The TXB0108 is designed so that the OE input circuit is supplied by VCCA.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

To ensure the high-impedance state during power-up or power-down, OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.

Package Information
PART NUMBER PACKAGE (1) BODY SIZE (NOM)
TXB0108DQS SON (20) 2.00mm x 4.00mm
TXB0108ZXY BGA MICROSTAR JUNIOR (20) 2.50mm x 3.00mm
TXB0108PW TSSOP (20) 6.50mm x 4.40mm
TXB0108RGY VQFN (20) 4.50mm x 3.50mm
TXB0108YZP DSGBA (20) 1.90mm x 2.40mm
TXB0108NME nFBGA (20) 2.50mm x 3.00mm
TXB0108RUK WQFN (20) 3.00mm x 3.00mm
TXB0108DGS VSSOP (20) 5.10mm x 3.00mm
TXB0108RKS VQFN (20) 4.50mm x 2.50mm
(1) For all available packages, see the orderable addendum at the end of the datasheet.
TXB0108 Typical Application Block Diagram for TXB0108 Typical Application Block Diagram for TXB0108