SCASE72 January   2025 SN54SC8T164-SEP

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics
    7. 5.7 Timing Characteristics
    8. 5.8 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Balanced CMOS Push-Pull Outputs
      2. 6.3.2 SCxT Enhanced Input Voltage
        1. 6.3.2.1 Up Translation
        2. 6.3.2.2 Down Translation
      3. 6.3.3 Clamp Diode Structure
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Typical Application
      1. 7.1.1 Application Information
      2. 7.1.2 Design Requirements
        1. 7.1.2.1 Power Considerations
        2. 7.1.2.2 Input Considerations
        3. 7.1.2.3 Output Considerations
      3. 7.1.3 Detailed Design Procedure
      4. 7.1.4 Application Curves
    2. 7.2 Power Supply Recommendations
    3. 7.3 Layout
      1. 7.3.1 Layout Guidelines
      2. 7.3.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.3.2.1 Up Translation

Input signals can be up translated using the SN54SC8T164-SEP. 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 SN54SC8T164-SEP, 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 6-2, 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
  • 5.0-V VCC – Inputs from 2.5V and 3.3V

SN54SC8T164-SEP SCxT Up and Down Translation ExampleFigure 6-2 SCxT Up and Down Translation Example