SLLSG12 August   2025 ISO6420 , ISO6421

ADVANCE INFORMATION  

  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  Safety-Related Certifications
    7. 6.7  Safety Limiting Values
    8. 6.8  Electrical Characteristics—5V Supply
    9. 6.9  Supply Current Characteristics—5V Supply
    10. 6.10 Electrical Characteristics—3.3V Supply
    11. 6.11 Supply Current Characteristics—3.3V Supply
    12. 6.12 Electrical Characteristics—2.5V Supply 
    13. 6.13 Supply Current Characteristics—2.5V Supply
    14. 6.14 Switching Characteristics—5V Supply
    15. 6.15 Switching Characteristics—3.3V Supply
    16. 6.16 Switching Characteristics—2.5V Supply
    17. 6.17 Insulation Characteristics Curves
  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
      1. 8.5.1 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 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
    1.     54
    2.     55

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|8
  • DWV|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

The ISO642x devices are general purpose digital isolators designed for applications requiring up to 5000VRMS isolation rating per UL 1577. The devices are also certified by VDE, TUV, CSA, and CQC.

The ISO642x devices provide high EMC performance while isolating CMOS or LVCMOS digital I/Os. ISO642x uses SiO2 as the isolation barrier. Each isolation channel has a logic input and output buffer separated by the insulation barrier.

The ISO6420 and ISO6420F devices have all channels in the forward direction. TheISO6421and ISO6421F devices have one reverse-direction channel.

In the event of input power or signal loss, the default output is high for devices without the suffix F and low for devices with the suffix F. See the Device Functional Modes section for further details.

Package Information
PART NUMBER(1) PACKAGE PACKAGE SIZE(2)

ISO6420, ISO6420F

ISO6421, ISO6421F

 SOIC (D-8) 6mm × 4.9mm

ISO6420, ISO6420F

ISO6421, ISO6421F

 Wide-SOIC (DWV-8) 11.5mm × 5.85mm
(1) For more information, see Section 12.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
ISO6420 ISO6421 Simplified Schematic
VCCI=Input supply, VCCO=Output supply
GNDI=Input ground, GNDO=Output ground
Simplified Schematic