SDLS973 june   2023 LSF0101

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    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  LSF0101 AC Performance (Translating Down) Switching Characteristics , VCCB = 3.3 V
    7. 6.7  LSF0101 AC Performance (Translating Down) Switching Characteristics, VCCB = 2.5 V
    8. 6.8  LSF0101 AC Performance (Translating Up) Switching Characteristics, VCCB = 3.3 V
    9. 6.9  LSF0101 AC Performance (Translating Up) Switching Characteristics, VCCB = 2.5 V
    10. 6.10 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Auto Bidirectional Voltage Translation
      2. 8.3.2 Output Enable
    4. 8.4 Device Functional Modes
      1. 8.4.1 Up and Down Translation
        1. 8.4.1.1 Up Translation
        2. 8.4.1.2 Down Translation
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Open-Drain Interface (I2C, PMBus, SMBus, and GPIO)
        1. 9.2.1.1 Design Requirements
          1. 9.2.1.1.1 Enable, Disable, and Reference Voltage Guidelines
          2. 9.2.1.1.2 Bias Circuitry
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Bidirectional Translation
          2. 9.2.1.2.2 Pull-Up Resistor Sizing
          3. 9.2.1.2.3 Single Supply Translation
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Voltage Translation for Vref_B < Vref_A + 0.8 V
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.4.1.2 Down Translation

When the signal is being driven HIGH from the Bn port to An port, the switch will be OFF, clamping the voltage on the An port to the voltage set by Vref_A. A pull-up resistor can be added on either side of the device. There are special circumstances that allow the removal of one or both of the pull-up resistors. If the signal is always going to be down translated from a push-pull transmitter, then the resistor on the B-side can be removed. If the leakage current into the receiver on the A-side is less than 1 µA, then the resistor on the A-side can also be removed. This arrangement with no external pull-up resistors can be used when down translating from a push-pull output to a low-leakage input. For an open drain transmitter, the pull-up resistor on the B-side is necessary because an open drain output can't drive high by itself. For a summary of device operation, refer to Section 8.4. For additional details on the functional operation of the LSF family of devices, see the Up Translation with the LSF Family and Down Translation with the LSF Family videos.