SLLSFF7B May   2021  – August 2026 ISOW1044

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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 Ratings
    6. 6.6  Insulation Specifications
    7. 6.7  Safety-Related Certifications
    8. 6.8  Safety Limiting Values
    9. 6.9  Electrical Characteristics
    10. 6.10 Supply Current Characteristics
    11. 6.11 Switching Characteristics
    12. 6.12 Insulation Characteristics Curves
    13. 6.13 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Power Isolation
    3. 8.3 Signal Isolation
    4. 8.4 CAN Transceiver
    5. 8.5 Remote Wake Request Using Wake-Up Pattern (WUP) in Standby Mode
    6. 8.6 Functional Block Diagram
    7. 8.7 Feature Description
      1. 8.7.1 CAN Bus States
      2. 8.7.2 Digital Inputs and Outputs: TXD (Input) and RXD (Output)
      3. 8.7.3 TXD Dominant Timeout (DTO)
      4. 8.7.4 Power-Up and Power-Down Behavior
      5. 8.7.5 Protection Features
      6. 8.7.6 Floating Pins, Unpowered Device
      7. 8.7.7 Glitch-Free Power Up and Power Down
    8. 8.8 Device Functional Modes
    9. 8.9 Device I/O Schematics
  10. 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
        1. 9.2.2.1 Bus Loading, Length and Number of Nodes
        2. 9.2.2.2 CAN Termination
      3. 9.2.3 Application Curve
        1. 9.2.3.1 Insulation Lifetime
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

8.8 Device Functional Modes

Table 8-1 lists the supply configuration for these devices:

Table 8-1 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
5V 1.71V to 5.5V H or Open Per Device Mode (1) and TXD Mirrors Bus 5V
5V 1.71V to 5.5V 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 8-2 shows the different driver functional modes:

Table 8-2 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. V O D = V C A N H - V C A N L

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 8-3 shows the different receiver functional modes:

Table 8-3 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 > 0.9V Dominant L
0.5V< VID < 0.9V Undefined Undefined
VID < 0.5V Recessive H
H or Open VID > 1.15V Dominant H (L if a remote wake event occurred)
0.4V< VID < 1.15V Undefined
VID < 0.4V Recessive
X Open (VID = 0V) Open H
L X X X Hi-Z
PD PU X X X X Hi-Z
PU PD(2) X X X X Invalid Operation
(1) PU=Powered up, PD=Powered down; H=high level; L=Low level; X=Irrelevant; 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. GND2 and GISOIN pins are shorted together and EN/FLT = High

At Normal mode (STB = L), the receiver output, RXD, goes low when the differential input voltage defined by Equation 3 is greater than the positive input threshold, VIT+. The receiver output, RXD, goes high when the differential input voltage defined by Equation 3 is less than the negative input threshold, VIT–. If the VID voltage is between the VIT+ and VIT– thresholds, the output is indeterminate.

Equation 3. V I D = V C A N H - V C A N L

At Standby mode (STB = H or Open), RXD output goes high and if a remote wake-up event occurs, RXD output goes low.

Other device feature functional states are shown inTable 8-4 and Table 8-5 below:

Table 8-4 DC-DC Converter Enable/Disable
INPUTSOUTPUT
VDD VIO EN/FLT VISOOUT
PUPUH or Open5V
PUPULOFF
Table 8-5 General Purpose Logic Input/Output
INPUTS OUTPUT Comments
VDD(1)(2) VIO EN/FLT IN OUT
PU PU H or Open H H Output channel assumes logic state governed by IN
L L
Open L Default state
L X Hi-Z Device is in disabled state when either of VDD or VIO is missing
PD PU X X Hi-Z
PU PD X X Invalid Operation
(1) PU = Powered Up; PD = Powered Down; H = Logic High; L= Logic Low; X = Irrelevant, Hi-Z = High Impedance (OFF) state
(2) VISOOUT shorted to VISOIN on PCB. GND2 and GISOIN pins are shorted together and EN=High