SCES220V April   1999  – August 2026 SN74LVC1G79

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  Timing Requirements: TA = –40°C to +85°C
    7. 5.7  Timing Requirements: TA = –40°C to +125°C
    8. 5.8  Switching Characteristics: CL = 15pF, TA = –40°C to +85°C
    9. 5.9  Switching Characteristics: CL = 30 or 50pF, TA = –40°C to +85°C
    10. 5.10 Switching Characteristics: CL = 30pF or 50pF, TA = –40°C to +125°C
    11. 5.11 Operating Characteristics
    12. 5.12 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Balanced High-Drive CMOS Push-Pull Outputs
      2. 7.3.2 Standard CMOS Inputs
      3. 7.3.3 Clamp Diodes
      4. 7.3.4 Partial Power Down (Ioff)
      5. 7.3.5 Over-Voltage Tolerant Inputs
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Community Resources
    4. 9.4 Trademarks
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.1 Application Information

A useful application for the SN74LVC1G79 is using it as a data latch with low-voltage data retention. This application implements the use of a microcontroller GPIO pin to act as a clock to set the output state and a second GPIO to provide the input data. If the SN74LVC1G79 is being powered from 1.8V and there is concern that a power glitch could exist as low as 1.5V, the device will retain the state of the Q output. An example of this data retention is shown in Figure 8-2 where the VCC drops to 1.5V and the Q output maintains the HIGH output state when VCC returns to 1.8V. If the VCC voltage drops below 1.5V, data retention is not guaranteed.