ZHCSRT9E january   2007  – march 2023 TXB0101

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specification
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics
    6. 6.6  Timing Requirements, VCCA = 1.2 V
    7. 6.7  Timing Requirements, VCCA = 1.5 V ± 0.1 V
    8. 6.8  Timing Requirements, VCCA = 1.8 V ± 0.15 V
    9. 6.9  Timing Requirements, VCCA = 2.5 V ± 0.2 V
    10. 6.10 Timing Requirements, VCCA = 3.3 V ± 0.3 V
    11. 6.11 Switching Characteristics, VCCA = 1.2 V
    12. 6.12 Switching Characteristics, VCCA = 1.5 V ± 0.1 V
    13. 6.13 Switching Characteristics, VCCA = 1.8 V ± 0.15 V
    14. 6.14 Switching Characteristics, VCCA = 2.5 V ± 0.2 V
    15. 6.15 Switching Characteristics, VCCA = 3.3 V ± 0.3 V
    16. 6.16 Operating Characteristics
    17. 6.17 Typical Characteristics
      1.      Parameter Measurement Information
  7. 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 Power Up
      3. 7.3.3 Enable and Disable
      4. 7.3.4 Pullup or Pulldown Resistors on I/O Lines
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Input Driver 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
  9. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 支持资源
    3. 9.3 Trademarks
    4. 9.4 静电放电警告
    5. 9.5 术语表
  10. 10Mechanical, Packaging, and Orderable Information

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7.3.1 Architecture

The TXB0101 architecture (see Figure 7-1) does not require a direction-control signal to control the direction of data flow from A to B or from B to A. In a DC state, the output drivers of the TXB0101 can maintain a high or low, but are designed to be weak, so that they can be overdriven by an external driver when data on the bus starts flowing the opposite direction.

The output one-shots detect rising or falling edges on the A or B ports. During a rising edge, the one-shot turns on the PMOS transistors (T1, T3) for a short duration, which speeds up the low-to-high transition. Similarly, during a falling edge, the one-shot turns on the NMOS transistors (T2, T4) for a short duration, which speeds up the high-to-low transition. The typical output impedance during output transition is 70 Ω at VCCO = 1.2 V to 1.8 V, 50 Ω at VCCO = 1.8 V to 3.3 V, and 40 Ω at VCCO = 3.3 V to 5 V.

GUID-517D7CF6-FE62-47F6-9BA4-9348CDC1DA97-low.gifFigure 7-1 Architecture of TXB0101 I/O Cell