SLOS346O MARCH   2001  – April 2018 SN65HVD230 , SN65HVD231 , SN65HVD232

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Equivalent Input and Output Schematic Diagrams
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  ESD Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4  Thermal Information
    5. 8.5  Electrical Characteristics: Driver
    6. 8.6  Electrical Characteristics: Receiver
    7. 8.7  Switching Characteristics: Driver
    8. 8.8  Switching Characteristics: Receiver
    9. 8.9  Switching Characteristics: Device
    10. 8.10 Device Control-Pin Characteristics
    11. 8.11 Typical Characteristics
  9. 9 Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Vref Voltage Reference
      2. 10.3.2 Thermal Shutdown
    4. 10.4 Device Functional Modes
      1. 10.4.1 High-Speed Mode
      2. 10.4.2 Slope Control Mode
      3. 10.4.3 Standby Mode (Listen Only Mode) of the HVD230
      4. 10.4.4 The Babbling Idiot Protection of the HVD230
      5. 10.4.5 Sleep Mode of the HVD231
      6. 10.4.6 Summary of Device Operating Modes
  11. 11Application and Implementation
    1. 11.1 Application Information
      1. 11.1.1 CAN Bus States
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
        1. 11.2.1.1 CAN Termination
        2. 11.2.1.2 Loop Propagation Delay
        3. 11.2.1.3 Bus Loading, Length and Number of Nodes
      2. 11.2.2 Detailed Design Procedure
        1. 11.2.2.1 Transient Protection
        2. 11.2.2.2 Transient Voltage Suppressors
      3. 11.2.3 Application Curve
    3. 11.3 System Example
      1. 11.3.1 ISO 11898 Compliance of SN65HVD23x Family of 3.3 V CAN Transceivers
        1. 11.3.1.1 Introduction
        2. 11.3.1.2 Differential Signal
          1. 11.3.1.2.1 Common Mode Signal
        3. 11.3.1.3 Interoperability of 3.3-V CAN in 5-V CAN Systems
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14Device and Documentation Support
    1. 14.1 Related Links
    2. 14.2 Receiving Notification of Documentation Updates
    3. 14.3 Community Resources
    4. 14.4 Trademarks
    5. 14.5 Electrostatic Discharge Caution
    6. 14.6 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

Package Options

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

11.3.1.2.1 Common Mode Signal

A common-mode signal is an average voltage of the two signal wires that the differential receiver rejects. The common-mode signal comes from the CAN driver, ground noise, and coupled bus noise. Since the bias voltage of the recessive state of the device is dependent on VCC, any noise present or variation of VCC will have an effect on this bias voltage seen by the bus. The SN65HVD23x family has the recessive bias voltage set higher than 0.5*VCC to comply with the ISO 11898-2 CAN standard which states that the recessive bias voltage must be between 2 V and 3 V. The caveat to this is that the common mode voltage will drop by a couple hundred millivolts when driving a dominant bit on the bus. This means that there is a common mode shift between the dominant bit and recessive bit states of the device. While this is not ideal, this small variation in the driver common-mode output is rejected by differential receivers and does not effect data, signal noise margins or error rates.