SLVSEM4B June   2018  – April 2021 LSF0204-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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  Switching Characteristics: AC Performance (Translating Down, 3.3 V to 1.8 V)
    7. 6.7  Switching Characteristics: AC Performance (Translating Down, 3.3 V to 1.2 V)
    8. 6.8  Switching Characteristics: AC Performance (Translating Up, 1.8 V to 3.3 V)
    9. 6.9  Switching Characteristics: AC Performance (Translating Up, 1.2 V to 1.8 V)
    10. 6.10 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Auto-Bidirectional Voltage Translation Without DIR Pin Terminal
      2. 7.3.2 Support Multiple High Speed Translation Interfaces
      3. 7.3.3 5-V Tolerance on IO Port and 125°C Support
      4. 7.3.4 Channel Specific Translation
      5. 7.3.5 Ioff, Partial Power Down Mode
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 I2C, PMBus, SMBus, GPIO Application
        1. 8.2.1.1 Design Requirements
          1. 8.2.1.1.1 Enable, Disable, and Reference Voltage Guidelines
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Bidirectional Translation
            1. 8.2.1.2.1.1 Pull-Up Resistor Sizing
        3. 8.2.1.3 Application Curve
      2. 8.2.2 MDIO Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
      3. 8.2.3 Multiple Voltage Translation in Single Device, Application
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information
8.2.1.1.1 Enable, Disable, and Reference Voltage Guidelines

The LSF0204-Q1 has an EN input that is used to disable the device by setting EN LOW, which places all I/Os in the high-impedance state. Since LSF0204-Q1 is switch-type voltage translator, the power consumption is very low. It is recommended to always enable LSF0204-Q1 for bidirectional application (I2C, SMBus, PMBus, or MDIO).

Table 8-2 Application Operating Condition
SYMBOLPARAMETERMINTYPMAXUNIT
Vref_AReference voltage (A)0.84.5V
Vref_BReference voltage (B)Vref_A + 0.85.5V
VI(EN)(1)Input voltage on EN terminal0Vref_AV
VpuPull-up supply voltage0Vref_BV
(1) Refer VIH and VIL for VI(EN)

Vref_B is recommended to be 1.0 V higher than Vref_A for best signal integrity.

The LSF0204-Q1 device enables multi-voltage translation by using the desired pull up voltage on each of the channels.

Note:

Vref_A must be set as lowest voltage level while using the device in multi-voltage translation application.