SLLSEF1B September   2013  – August 2015 ISO7142CC

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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  Electrical Characteristics, 5 V
    6. 6.6  Electrical Characteristics, 3.3 V
    7. 6.7  Electrical Characteristics, 2.7 V
    8. 6.8  Power Dissipation Characteristics
    9. 6.9  Switching Characteristics, 5 V
    10. 6.10 Switching Characteristics, 3.3 V
    11. 6.11 Switching Characteristics, 2.7 V
    12. 6.12 Supply Current, 5 V
    13. 6.13 Supply Current, 3.3 V
    14. 6.14 Supply Current, 2.7 V
    15. 6.15 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Insulation and Safety-Related Specifications
      2. 8.3.2 Regulatory Information
      3. 8.3.3 Safety Limiting Values
    4. 8.4 Device Functional Modes
  9. 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 Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 PCB Material
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

9.1 Application Information

ISO7142CC uses single-ended TTL-logic switching technology. Its supply voltage range is from 2.7 V to 5.5 V for both supplies, VCC1 and VCC2. When designing with digital isolators, it is important to note that due to 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.

9.2 Typical Application

Typical isolated RS-232 interface implementation is shown in Figure 14.

ISO7142CC typ_app_sllsef1.gifFigure 14. Typical Isolated RS-232 Application Circuit for ISO7142

9.2.1 Design Requirements

Unlike optocouplers, which require external components to improve performance, provide bias, or limit current, ISO7142CC only requires two external bypass capacitors to operate.

9.2.2 Detailed Design Procedure

Figure 15 shows the hookup of a typical ISO7142CC circuit. The only external components are two bypass capacitors.

ISO7142CC detailed_design_sllsef1.gifFigure 15. Typical ISO7142CC Circuit Hook-up

9.2.3 Application Curves

ISO7142CC eye_diagram_2.7V_sllsef1.gifFigure 16. Typical Eye Diagram at 40 Mbps,
PRBS 216 - 1, 2.7-V Operation
ISO7142CC eye_diagram_5V_sllsef1.gifFigure 18. Typical Eye Diagram at 50 Mbps,
PRBS 216 - 1, 5-V Operation
ISO7142CC eye_diagram_3.3V_sllsef1.gifFigure 17. Typical Eye Diagram at 40 Mbps,
PRBS 216 - 1, 3.3-V Operation