SLVSJ21 June   2026 ISO6431-Q1

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  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  Power Ratings
    6. 6.6  Insulation Specifications
    7. 6.7  Safety-Related Certifications
    8. 6.8  Safety Limiting Values 
    9. 6.9  Electrical Characteristics—5V Supply
    10. 6.10 Supply Current Characteristics—5V Supply 
    11. 6.11 Electrical Characteristics—3.3V Supply
    12. 6.12 Supply Current Characteristics—3.3V Supply 
    13. 6.13 Electrical Characteristics—2.5V Supply 
    14. 6.14 Supply Current Characteristics—2.5V Supply 
    15. 6.15 Switching Characteristics—5V Supply
    16. 6.16 Switching Characteristics—3.3V Supply
    17. 6.17 Switching Characteristics—2.5V Supply
    18. 6.18 Insulation Characteristics Curves
    19. 6.19 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 Electromagnetic Compatibility (EMC) Considerations
    4. 8.4 Device Functional Modes
    5. 8.5 Device I/O Schematics
    6. 8.6 Overvoltage Tolerant Input
  10. 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 Curve
    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 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Device Nomenclature
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
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    2.     58
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9.1 Application Information

The ISO643x-Q1 devices are high-performance, low power, triple-channel digital isolators. These devices come with enable pins on each side which can be used to put the respective outputs in high impedance for parallel (multiple) driver applications. TheISO643x-Q1 devices use single-ended CMOS-logic switching technology.

The supply voltage range is from 2.25V to 5.5V for both supplies, VCC1 and VCC2. Since an isolation barrier separates the two sides, each side can be sourced independently with any voltage within the Recommended Operating Conditions section. As an example, supplying ISO643x-Q1 VCC1 with 3.3V (which is within 2.25V to 5.5V) and VCC2 with 5V (which is also within 2.25V to 5.5V) is possible. You can use the digital isolator as a logic-level translator in addition to providing isolation. When designing with digital isolators, keep in mind that because of the single-ended design structure, digital isolators do not conform to any specific interface standard and are only intended for isolating single-ended CMOS or TTL digital signal lines. The isolator is typically placed between the data controller (that is, MCU or FPGA), and a data converter or a line transceiver, regardless of the interface type or standard.