SLLSF19 December   2017 TCAN4420

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Functional Block Diagram
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 ESD Ratings Specifications
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Thermal Information
    6. 6.6 Power Supply Characteristics
    7. 6.7 AC and DC Electrical Characteristics
    8. 6.8 Timing Requirements
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 TXD Dominant Time Out (DTO)
      2. 8.3.2 CAN Bus Short Circuit Current Limiting
      3. 8.3.3 Thermal Shutdown
      4. 8.3.4 Under Voltage Lockout (UVLO) and Unpowered Device
        1. 8.3.4.1 VIO Supply PIN
    4. 8.4 Device Functional Modes
      1. 8.4.1 Polarity Configuration
      2. 8.4.2 Normal Polarity Mode
      3. 8.4.3 Reverse Polarity Mode
      4. 8.4.4 Driver and Receiver Function
      5. 8.4.5 Floating Terminals
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 Bus Loading, Length and Number of Nodes
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 CAN Termination
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Device Nomenclature
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.1 Overview

The TCAN4420 is a high-speed CAN transceiver that meets the specifications of the ISO 11898-2 (2016) High Speed CAN (Controller Are Network) physical layer standards. It includes many protection features providing device and CAN network robustness. It also allows for the polarity of the CAN pins to be controlled externally by a micro-controller through the use of the polarity switch pin, SW.

The CAN bus has two logical states during operation: recessive and dominant. See Figure 6 and Figure 7.

A recessive bus state occurs when the bus is biased to a common mode of VCC/2 via the receivers bias unit. Recessive is equivalent to logic high on the TXD pin and is typically a differential voltage on the bus of approximately 0 V.

A dominant bus state occurs when the bus is driven differentially by one or more drivers. The driver produces a current which flows through the termination resistors on the bus and generates a differential voltage. Dominant is equivalent to logic low on the TXD pin and is a differential voltage on the bus greater than the minimum required threshold for a CAN dominant.

The host microprocessor of the CAN node uses the TXD terminal, pin 1, to drive the bus and receives data from the bus via the RXD terminal, pin 4. The TCAN4420 integrates level shifting capabilities into the RXD output via the VIO pin. This feature eliminates the need for an additional level shifter between the host microprocessor and the RXD output of the CAN transceiver.