SLLSF22I April   2018  – August 2026 ISO1410 , ISO1412 , ISO1430 , ISO1432 , ISO1450 , ISO1452

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: Full-Duplex Device
    2.     Pin Functions: Half-Duplex Device
  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: Driver
    10. 6.10 Electrical Characteristics: Receiver
    11. 6.11 Supply Current Characteristics: Side 1 (ICC1)
    12. 6.12 Supply Current Characteristics: Side 2 (ICC2)
    13. 6.13 Switching Characteristics: Driver
    14. 6.14 Switching Characteristics: Receiver
    15. 6.15 Insulation Characteristics Curves
    16. 6.16 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
      2. 8.3.2 Failsafe Receiver
      3. 8.3.3 Thermal Shutdown
      4. 8.3.4 Glitch-Free Power Up and Power Down
    4. 8.4 Device Functional Modes
      1. 8.4.1 Device I/O Schematics
  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
        1. 9.2.2.1 Data Rate and Bus Length
        2. 9.2.2.2 Stub Length
        3. 9.2.2.3 Bus Loading
      3. 9.2.3 Application Curves
        1. 9.2.3.1 Insulation Lifetime
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
        1. 9.4.1.1 PCB Material
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
        1. 10.1.1.1 Related Links
    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

8.1 Overview

The ISO14xx devices are isolated RS-485/RS-422 transceivers designed to operate in harsh industrial environments. ISO141x, ISO143x and ISO145x devices support up to 500kbps, 12Mbps and 50Mbps signaling rates respectively. This family of devices has a 3-channel digital isolator and an RS-485 transceiver in a 16-pin wide-body SOIC package. The silicon-dioxide based capacitive isolation barrier supports an isolation withstand voltage of 5kVRMS and an isolation working voltage of 1500VPK. Isolation breaks the ground loop between the communicating nodes and allows for data transfer in the presence of large ground potential differences. These devices have a higher typical differential output voltage (VOD) than traditional transceivers for better noise immunity. A minimum differential output voltage of 2.1V is specified at a VCC2 voltage of 5V ±10% which meets the requirements for Profibus applications. The wide logic supply of the device (VCC1) supports interfacing with 1.8V, 2.5V, 3.3V, and 5V control logic. The 3V to 5.5V bus side supply (VCC2) removes the need of a well-regulated isolated supply in end systems. Figure 8-1 shows the functional block diagram of the full-duplex devices and Figure 8-2 shows the functional block diagram of a half-duplex devices.