SCDS400B march   2022  – july 2023 TMUX7348F , TMUX7349F

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison Table
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Thermal Information
    4. 7.4  Recommended Operating Conditions
    5. 7.5  Electrical Characteristics (Global)
    6. 7.6  ±15 V Dual Supply: Electrical Characteristics
    7. 7.7  ±20 V Dual Supply: Electrical Characteristics
    8. 7.8  12 V Single Supply: Electrical Characteristics
    9. 7.9  36 V Single Supply: Electrical Characteristics
    10. 7.10 Typical Characteristics
  9. 8 Parameter Measurement Information
    1. 8.1  On-Resistance
    2. 8.2  Off-Leakage Current
    3. 8.3  On-Leakage Current
    4. 8.4  Input and Output Leakage Current Under Overvoltage Fault
    5. 8.5  Break-Before-Make Delay
    6. 8.6  Enable Delay Time
    7. 8.7  Transition Time
    8. 8.8  Fault Response Time
    9. 8.9  Fault Recovery Time
    10. 8.10 Fault Flag Response Time
    11. 8.11 Fault Flag Recovery Time
    12. 8.12 Charge Injection
    13. 8.13 Off Isolation
    14. 8.14 Crosstalk
    15. 8.15 Bandwidth
    16. 8.16 THD + Noise
  10. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Flat ON- Resistance
      2. 9.3.2 Protection Features
        1. 9.3.2.1 Input Voltage Tolerance
        2. 9.3.2.2 Powered-Off Protection
        3. 9.3.2.3 Fail-Safe Logic
        4. 9.3.2.4 Overvoltage Protection and Detection
        5. 9.3.2.5 Adjacent Channel Operation During Fault
        6. 9.3.2.6 ESD Protection
        7. 9.3.2.7 Latch-Up Immunity
        8. 9.3.2.8 EMC Protection
      3. 9.3.3 Overvoltage Fault Flags
      4. 9.3.4 Bidirectional and Rail-to-Rail Operation
      5. 9.3.5 1.8 V Logic Compatible Inputs
      6. 9.3.6 Integrated Pull-Down Resistor on Logic Pins
    4. 9.4 Device Functional Modes
      1. 9.4.1 Normal Mode
      2. 9.4.2 Fault Mode
      3. 9.4.3 Truth Tables
  11. 10Application 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
    3. 10.3 Power Supply Recommendations
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
      2. 10.4.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

9.3.2.8 EMC Protection

The TMUX7348F and TMUX7349F are not intended for standalone electromagnetic compatibility (EMC) protection in industrial applications. There are three common high voltage transient specifications that govern industrial high voltage transient specifications: IEC61000-4-2 (ESD), IEC61000-4-4 (EFT), and IEC61000-4-5 (surge immunity). A transient voltage suppressor (TVS), along with some low-value series current limiting resistors, are required to prevent source input voltages from going above the rated ±60 V limits.

When selecting a TVS protection device, it is critical to ensure that the maximum working voltage is greater than both the normal operating range of the input source pins to be protected and any known system common-mode overvoltage that may be present due to incorrect wiring, loss of power, or short circuit. Figure 9-2 shows an example of the proper design window when selecting a TVS device.

Region 1 denotes the normal operation region of TMUX7348F and TMUX7349F where the input source voltages stay below the fault supplies VFP and VFN. Region 2 represents the range of possible persistent DC (or long duration AC overvoltage fault) presented on the source input pins. Region 3 represents the margin between any known DC overvoltage level and the absolute maximum rating of the TMUX7348F and TMUX7349F. The TVS breakdown voltage must be selected to be less than the absolute maximum rating of the TMUX7348F and TMUX7349F, but greater than any known possible persistent DC or long duration AC overvoltage fault to avoid triggering the TVS inadvertently. Region 4 represents the margin system designers must impose when selecting the TVS protection device to prevent accidental triggering of ESD cells of the TMUX7348F and TMUX7349F devices.

GUID-1594B65B-5FA6-40CA-9DF3-38507496D45D-low.gif Figure 9-2 System Operation Regions and Proper Region of Selecting a TVS Protection Device