SCDS382C April   2018  – August 2019 TMUX1072

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin 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 Dynamic Characteristics
    7. 6.7 Timing Requirements
    8. 6.8 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Powered-off Protection
      2. 8.3.2 Overvoltage Detection
      3. 8.3.3 Overtemperature Detection
      4. 8.3.4 Overvoltage Protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Pin Functions
  9. 9 Application 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
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.4 Overvoltage Protection

The OVP of the TMUX1072 is designed to protect the system from overvoltage conditions up to 18 V on the COM1 and COM2 pins. This protection is valid even if Vcc = 0V. Figure 15 depicts an event where up to 18 V could appear on COM1 and COM2 that could pass through the device and damage components behind the device.

TMUX1072 scds382_no_ovp.gifFigure 15. Existing Solution Being Damaged by a Short, 18 V

The TMUX1072 opens the switches and protect the rest of the system by blocking the 18 V as depicted in Figure 16.

TMUX1072 scds382_18v_ovp.gifFigure 16. Protecting During a 18-V Short

Figure 17 is a waveform showing the voltage on the pins during an overvoltage scenario.

TMUX1072 scds382_ovp_wavform.gifFigure 17. Overvoltage Protection Waveform, 18 V