SLLSE83F April   2013  – January 2015 ISO7131CC , ISO7140CC , ISO7140FCC , ISO7141CC , ISO7141FCC

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  Power Dissipation Ratings
    6. 6.6  Electrical Characteristics: VCC1 and VCC2 at 5 V ±10%
    7. 6.7  Electrical Characteristics: VCC1 and VCC2 at 3.3 V ±10%
    8. 6.8  Electrical Characteristics: VCC1 and VCC2 at 2.7 V
    9. 6.9  Switching Characteristics: VCC1 and VCC2 at 5 V ±10%
    10. 6.10 Switching Characteristics: VCC1 and VCC2 at 3.3 V ±10%
    11. 6.11 Switching Characteristics: VCC1 and VCC2 at 2.7 V
    12. 6.12 Supply Current: VCC1 and VCC2 at 5 V ±10%
    13. 6.13 Supply Current: VCC1 and VCC2 at 3.3 V ±10%
    14. 6.14 Supply Current: VCC1 and VCC2 at 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
        1. 8.3.1.1 Safety Limiting Values
        2. 8.3.1.2 Regulatory Information
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Isolated Data Acquisition System for Process Control
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Isolated RS-485 Interface
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 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 Related Links
    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

1 Features

  • Maximum Signaling Rate: 50 Mbps (With 5-V Supplies)
  • Robust Design With Integrated Noise Filter
  • Default Output Low Option (Suffix F)
  • Low Power Consumption, Typical ICC per Channel (With 3.3-V Supplies):
    • ISO7131: 1.5 mA at 1 Mbps,
      2.6 mA at 25 Mbps
    • ISO7140: 1 mA at 1 Mbps,
      2.3 mA at 25 Mbps
    • ISO7141: 1.3 mA at 1 Mbps,
      2.6 mA at 25 Mbps
  • Low Propagation Delay: 23-ns Typical
    (3.3-V Supplies)
  • Wide Temperature Range: –40°C to 125°C
  • 50-kV/µs Transient Immunity, Typical
  • Long Life With SiO2 Isolation Barrier
  • Operates from 2.7-V, 3.3-V, and 5-V Supply and Logic Levels
  • Small QSOP-16 Package
  • Safety and Regulatory Approvals
    • 2500-VRMS Isolation for 1 minute per UL 1577
    • 4242-VPK Isolation per DIN V VDE V 0884-10 (VDE V 0884-10):2006-12, 566 VPK Working Voltage
    • CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 61010-1 End Equipment Standards
    • CQC Certification per GB 4943.1-2011

2 Applications

  • General-Purpose Isolation
    • Industrial Fieldbus
      • Profibus
      • Modbus™
      • DeviceNet Data Buses
    • RS-232, RS-485
    • Serial Peripheral Interface

3 Description

ISO7131, ISO7140, and ISO7141 devices provide galvanic isolation up to 2500 VRMS for 1 minute per UL and 4242 VPK per VDE. ISO7131 has three channels with two forward and one reverse-direction channels. ISO7140 and ISO7141 are quad-channel isolators; ISO7140 has four forward channels, ISO7141 has three forward and one reverse-direction channels. These devices are capable of 50-Mbps maximum data rate with 5-V supplies and 40-Mbps maximum data rate with 3.3-V or 2.7-V supplies, with integrated filters on the inputs for noise-prone applications. The suffix F indicates that default output state is low; otherwise, the default output state is high (see Table 3).

Each isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier. Used with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. The devices have TTL input thresholds and can operate from 2.7-V, 3.3-V, and 5-V supplies. All inputs are 5-V tolerant when supplied from a 2.7-V or 3.3-V supply.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
ISO7131CC SSOP (16) 4.90 mm × 3.90 mm
ISO7140CC
ISO7140FCC
ISO7141CC
ISO7141FCC
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Simplified Schematic

Simplified_Schematic_sllsei6.gif