SLLSG21 April   2025 ISO6540 , ISO6541 , ISO6542

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Package Characteristics
    6. 5.6  Electrical Characteristics—5-V Supply
    7. 5.7  Supply Current Characteristics—5-V Supply
    8. 5.8  Electrical Characteristics—3.3-V Supply
    9. 5.9  Supply Current Characteristics—3.3-V Supply
    10. 5.10 Electrical Characteristics—2.5-V Supply 
    11. 5.11 Supply Current Characteristics—2.5-V Supply
    12. 5.12 Electrical Characteristics—1.8-V Supply
    13. 5.13 Supply Current Characteristics—1.8-V Supply
    14. 5.14 Switching Characteristics—5-V Supply
    15. 5.15 Switching Characteristics—3.3-V Supply
    16. 5.16 Switching Characteristics—2.5-V Supply
    17. 5.17 Switching Characteristics—1.8-V Supply
    18. 5.18 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Electromagnetic Compatibility (EMC) Considerations
    4. 7.4 Device Functional Modes
    5. 7.5 Device I/O Schematics
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

3 Description

The ISO654x devices are general purpose functional isolators for cost sensitive, space constrained applications that require isolation for non-safety applications. The isolation barrier supports a working voltage of 400VRMS / 566VDC and transient over voltages of 707VRMS / 1000VDC.

The ISO654x devices provide high EMC performance while isolating CMOS or LVCMOS digital I/Os. ISO654x uses SiO2 as the isolation barrier. Each isolation channel has a logic input and output buffer separated by the insulation barrier. These devices come with enable pins that can be used to put the respective outputs in high impedance.

The ISO6540 and ISO6540F devices have all channels in the forward direction. TheISO6541and ISO6541F devices have one reverse-direction channel.The ISO6542 and ISO6542F devices have two reverse-direction channels.

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 Section 7.4 for further details.

These devices help prevent noise currents on GPIOs or data buses such as SPI, UART RS-485, RS-232, and CAN from causing data corruption or damaging sensitive circuitry. Through chip design and layout techniques, the electromagnetic compatibility of the devices have been significantly enhanced to ease system-level design.

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

ISO6540, ISO6540F

ISO6541, ISO6541F

ISO6542, ISO6542F

 SSOP (DBQ-16) 6mm × 4.9mm
(1) For more information, see Section 11.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
ISO6540 ISO6541 ISO6542 Simplified Schematic
VCCI=Input supply, VCCO=Output supply
GNDI=Input ground, GNDO=Output ground
Simplified Schematic