SLLSFN1A May   2021  – August 2026 ISOS141-SEP

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  Power Ratings
    6. 5.6  Insulation Specifications
    7. 5.7  Safety-Related Certifications
    8. 5.8  Safety Limiting Values
    9. 5.9  Electrical Characteristics—5-V Supply
    10. 5.10 Supply Current Characteristics—5-V Supply
    11. 5.11 Electrical Characteristics—3.3-V Supply
    12. 5.12 Supply Current Characteristics—3.3-V Supply
    13. 5.13 Electrical Characteristics—2.5-V Supply 
    14. 5.14 Supply Current Characteristics—2.5-V Supply
    15. 5.15 Switching Characteristics—5-V Supply
    16. 5.16 Switching Characteristics—3.3-V Supply
    17. 5.17 Switching Characteristics—2.5-V Supply
    18. 5.18 Insulation Characteristics Curves
    19. 5.19 Typical Characteristics
  7. 6 Operating Life Deration
  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 Radiation Tolerance
      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
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
        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
    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

3 Description

The ISOS141-SEP radiation-tolerant device is a high-performance, quad-channel digital isolator in a small form factor 16-pin QSOP package. Each isolation channel has a logic input and output buffer separated by a double capacitive silicon dioxide (SiO2) insulation barrier. This device supports low Earth orbit (LEO) space applications with a high data rate of 100Mbps, low propagation delay of 10.7ns, and tight channel-to-channel skew of 4ns. The ISOS141-SEP device has three forward and one reverse-direction channels and if the input power or signal is lost, the default output is low. The enable pins can be used to put the respective outputs in high impedance for multi-controller driving applications and to reduce power consumption.

The ISOS141-SEP provides high electromagnetic immunity and low emissions with low power consumption, while isolating CMOS or LVCMOS digital I/Os. The device has a high common-mode transient immunity of 100kV/µs and can ease system-level ESD, EFT, surge, and simplify emissions compliance through remarkable chip design.

Device Information
PART NUMBER RATING PACKAGE(1) BODY SIZE (NOM)
ISOS141FDBQSEP

30krad(Si) RLAT/RHA

 DBQ (QSOP, 16) 4.90mm × 3.90mm
ISOS141FDBQTSEP
(1) For all available packages, see the orderable addendum at the end of the data sheet.
ISOS141-SEP Simplified Schematic
VCCI=Input supply, VCC2=Output supply
GND1=Input ground, GND2=Output ground
Simplified Schematic