SCLS749B February   2014  – September 2014 SN74LV4T125

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Simplified Application Diagram
  5. Revision History
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Noise Characteristics
    8. 7.8 Operating Characteristics
    9. 7.9 Typical Characteristics
  8. Parameter Measurement Information
  9. Detailed Description
    1. 9.1 Overview
      1. 9.1.1 Translating Down
      2. 9.1.2 Translating Up
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
    4. 9.4 Device Functional Modes
  10. 10Applications and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Additional Product Selection
    2. 13.2 Trademarks
    3. 13.3 Electrostatic Discharge Caution
    4. 13.4 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

10 Applications and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

10.1 Application Information

Based upon the lower-threshold circuit design of the LVxT family, the LVxT family also supports level translation. For level translation up and down, the LVxT family requires only a single power supply.

app_diagram1_scls749.gif

10.2 Typical Application

typ_des_cls739.gif
typ2_des_cls739.gifFigure 3. Switching Thresholds for 1.8 V to 3.3 V Translation

10.2.1 Design Requirements

This device uses CMOS technology and has balanced output drive. The input threshold levels are lowered to allow for up translation. At 5 V the device has equivalent TTL input levels.

10.2.2 Detailed Design Procedure

  1. Recommended input conditions:
  2. Recommend output conditions:
    • Load currents should not exceed 35 mA per output and 70 mA total for the part.
    • Outputs should not be pulled above VCC.

10.2.3 Application Curves

C002_scls743.pngFigure 4. Switching Characteristics at 50 MHz
Excellent Signal Integrity (3.3 V to 3.3 V at 3.3-V VCC)
C003_scls743.pngFigure 5. Switching Characteristics at 15 MHz
Excellent Signal Integrity (3.3 V to 1.8 V at 1.8-V VCC)