SLLSFA0C July   2019  – May 2024 ISO7021

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
    1.     Pin 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 Electrical Characteristics 1.8V Supply
    16. 6.16 Supply Current Characteristics 1.8V Supply
    17. 6.17 Switching 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 Refresh
      2. 8.3.2 Electromagnetic Compatibility (EMC) Considerations
    4. 8.4 Device Functional Modes
      1. 8.4.1 Device I/O Schematics
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Insulation Lifetime
      2. 9.1.2 Intrinsic Safety
        1. 9.1.2.1 Schedule of Limitations
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 PCB Material
    2. 11.2 Layout Example
  13. 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 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  14. 13Revision History
  15. 14Mechanical, Packaging, and Orderable Information

Package Options

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

9.1 Application Information

The ISO7021 device is an ultra-low power digital isolator. The device uses single-ended CMOS-logic switching technology. The voltage range is from 1.71V to 1.89V and 2.25V to 5.5V for both supplies, VCC1 and VCC2, and can be set irrespective of one another. 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, μC or UART), and a data converter or a line transceiver, regardless of the interface type or standard. See Isolated power and data interface for low-power applications reference design TI Design for detailed information on designing the ISO70xx in low-power applications.