SLLSFF7A may   2021  – december 2021 ISOW1044

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Description Continued
  7. 6 Device Comparison Table
  8. 7 Pin Configuration and Functions
  9. 8 Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  ESD Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4  ThermalInformation
    5. 8.5  Power Ratings
    6. 8.6  Insulation Specifications
    7. 8.7  Safety-Related Certifications
    8. 8.8  Safety Limiting Values
    9. 8.9  Electrical Characteristics
    10. 8.10 Supply Current Characteristics
    11. 8.11 Switching Characteristics
    12. 8.12 Insulation Characteristics Curves
    13. 8.13 Typical Characteristics
  10. 9 Parameter Measurement Information
  11. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Power Isolation
    3. 10.3 Signal Isolation
    4. 10.4 CAN Transceiver
      1. 10.4.1 Remote Wake Request via Wake-Up Pattern (WUP) in Standby Mode
    5. 10.5 Functional Block Diagram
    6. 10.6 Feature Description
      1. 10.6.1 CAN Bus States
      2. 10.6.2 Digital Inputs and Outputs: TXD (Input) and RXD (Output)
      3. 10.6.3 TXD Dominant Timeout (DTO)
      4. 10.6.4 Power-Up and Power-Down Behavior
      5. 10.6.5 Protection Features
      6. 10.6.6 Floating Pins, Unpowered Device
      7. 10.6.7 Glitch-Free Power Up and Power Down
    7. 10.7 Device Functional Modes
    8. 10.8 Device I/O Schematics
  12. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
        1. 11.2.2.1 Bus Loading, Length and Number of Nodes
        2. 11.2.2.2 CAN Termination
      3. 11.2.3 Application Curve
      4. 11.2.4 Insulation Lifetime
  13. 12Power Supply Recommendations
  14. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  15. 14Device and Documentation Support
    1. 14.1 Documentation Support
      1. 14.1.1 Related Documentation
    2. 14.2 Receiving Notification of Documentation Updates
    3. 14.3 Support Resources
    4. 14.4 Trademarks
    5. 14.5 Electrostatic Discharge Caution
    6. 14.6 Glossary
  16. 15Mechanical, Packaging, and Orderable Information

10.7 Device Functional Modes

Table 10-1 lists the supply configuration for these devices:

Table 10-1 Supply configuration Function Table
INPUTS OUTPUTS
VDD VIO EN/FLT BUS OUTPUT (CANH/CANL) RXD VISOOUT(2)
< VDD(UVLO+) >VIO(UVLO+) X High-Z Recessive (Default High) OFF
>VDD(UVLO+) <VIO(UVLO+) X High-Z Recessive (Default High) Invalid Operation
5 V 1.71 V to 5.5 V H or Open Per Device Mode (1) and TXD Mirrors Bus 5 V
5 V 1.71 V to 5.5 V L High-Z Recessive (Default High) OFF
(1) At Normal mode (STB = L), BUS OUTPUT follows TXD. Otherwise if at Standby mode (STB = H or Open), BUS OUTPUT is High-Z.
(2) VISOOUT shorted to VISOIN on PCB. GND2 and GISOIN pins are shorted together and EN/FLT = High.

Table 10-2 shows the different driver functional modes:

Table 10-2 Driver Functional Table
INPUTS OUTPUTS
VDD(1) VIO EN/FLT STB INPUT TXD CANH (3) CANL (3) DRIVEN BUS STATE
PU PU H or Open L L H L Dominant
H or Open Z Z Recessive
H or Open X Hi-Z Hi-Z Weak pull-down to ground
L X X Hi-Z Hi-Z Weak pull-down to ground
PD PU X X X Hi-Z Hi-Z Weak pull-down to ground
PU PD(2) X X X Invalid Operation
(1) PU=Powered up, PD=Powered down; H=high level; L=Low level; X=Irrelevant; Z = common-mode (recessive) biased to VISOIN/2 , Hi-Z=High impedance state
(2) A strongly driven input signal on TXD can weakly power the floating VIO through an internal protection diode and cause an undetermined output.
(3) VISOOUT shorted to VISOIN on PCB and GND2 and GISOIN pins are shorted together and EN/FLT = High

At Normal mode (STB = L), the CAN outputs follow the logic states at data input, TXD. A logic low at the TXD input causes the CAN output to go dominant. Therefore the differential output voltage defined by Equation 2 is positive. A logic high at the TXD input causes the CAN BUS to go recessive. Therefore the differential output voltage defined by Equation 2 is negative.

Equation 2. VOD = VCANH – VCANL

At Standby mode (STB = H or Open), both outputs go to the high-impedance (Hi-Z) state. The logic state at the TXD pin is irrelevant when this mode. The driver is disabled (bus outputs are in the Hi-Z) by default when the STB pin is left open. The TXD pin has an internal pullup resistor.

Table 10-3 shows the different receiver functional modes:

Table 10-3 Receiver Functional Table
INPUTS OUTPUT
VDD(1) VIO EN/FLT STB CAN DIFFERENTIAL INPUTS VID = VCANH- VCANL BUS STATE RXD (3)
PU PU H or Open L VID