ZHCSL04A March   2020  – July 2020 ISO1044

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions—8 Pins
  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 - DC Specification
    10. 6.10 Switching Characteristics
    11. 6.11 Insulation Characteristics Curves
    12. 6.12 Typical Characteristics
  7. Parametric Measurement Information
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 CAN Bus States
      2. 8.3.2 Digital Inputs and Outputs: TXD (Input) and RXD (Output)
      3. 8.3.3 Protection Features
        1. 8.3.3.1 TXD Dominant Timeout (DTO)
        2. 8.3.3.2 Thermal Shutdown (TSD)
        3. 8.3.3.3 Undervoltage Lockout and Default State
        4. 8.3.3.4 Floating Pins
        5. 8.3.3.5 Unpowered Device
        6. 8.3.3.6 CAN Bus Short Circuit Current Limiting
    4. 8.4 Device Functional Modes
  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
  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 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Device Functional Modes

Table 8-2 and Table 8-3 list the driver and receiver functions. Table 8-4 lists the functional modes for the ISO1044B device.

Table 8-2 Driver Function Table
INPUTOUTPUTSDRIVEN BUS STATE
TXD(1)CANH(1)CANL(1)
LHLDominant
HZZRecessive
H = high level, L = low level, Z = common mode (recessive) bias to VCC / 2. See Figure 8-1 and Figure 8-2 for bus state and common mode bias information.
Table 8-3 Receiver Function Table
DEVICE MODECAN DIFFERENTIAL INPUTS
VID = VCANH – VCANL(3)
BUS STATERXD PIN(1)
NormalVID ≥ VIT(MAX)DominantL
VIT(MIN) < VID < VIT(MAX)UndefinedUndefined
VID ≤ VIT(MIN)RecessiveH
Open (VID ≈ 0 V)OpenH
H = high level, L = low level
Table 8-4 Function Table
DRIVER(1)RECEIVER
INPUTSOUTPUTSBUS STATEDIFFERENTIAL INPUTS VID = CANH–CANL(3)OUTPUT
RXD
BUS STATE
TXDCANHCANL
L(2)HLDOMINANTVID ≥ VIT(MAX)LDOMINANT
HZZRECESSIVEVIT(MIN) < VID < VIT(MAX)UndefinedUndefined
OpenZZRECESSIVEVID ≤ VIT(MIN)HRECESSIVE
X if VCC1 supply < UVVCC1ZZRECESSIVEOpen (VID ≈ 0 V)HRECESSIVE
H = high level; L = low level; X = irrelevant; Z = high impedance
Logic low pulses to prevent dominant time-out.
See Receiver Electrical Characteristics section for input thresholds.