SCLS985 January   2024 SN74LV4T125-EP

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Additional Product Selection
  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 Switching Characteristics
    7. 6.7 Noise Characteristics
    8. 6.8 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 Balanced CMOS 3-State Outputs
      2. 8.3.2 Clamp Diode Structure
      3. 8.3.3 LVxT Enhanced Input Voltage
        1. 8.3.3.1 Down Translation
        2. 8.3.3.2 Up Translation
    4. 8.4 Device Functional Modes
  10. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.3.2 Up Translation

Input signals can be up translated using the SN74LV4T125-EP. The voltage applied at VCC will determine the output voltage and the input thresholds as described in the Recommended Operating Conditions and Electrical Characteristics tables. When connected to a high-impedance input, the output voltage will be approximately VCC in the HIGH state, and 0V in the LOW state.

The inputs have reduced thresholds that allow for input HIGH state levels which are much lower than standard values. For example, standard CMOS inputs for a device operating at a 5V supply will have a VIH(MIN) of 3.5V. For the SN74LV4T125-EP, VIH(MIN) with a 5V supply is only 2V, which would allow for up-translation from a typical 2.5V to 5V signals.

As shown in Figure 8-3, ensure that the input signals in the HIGH state are above VIH(MIN) and input signals in the LOW state are lower than VIL(MAX).

Up Translation Combinations are as follows:

  • 1.8V VCC – Inputs from 1.2V
  • 2.5V VCC – Inputs from 1.8V
  • 3.3V VCC – Inputs from 1.8V and 2.5V
  • 5.0V VCC – Inputs from 2.5V and 3.3V

GUID-20230912-SS0I-T8CH-LXBB-VX2MWNZRH0PK-low.svg Figure 8-3 LVxT Up and Down Translation Example