SLLSFS1B August   2023  – April 2024 THVD4431

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  ESD Ratings [IEC]
    4. 5.4  Recommended Operating Conditions
    5. 5.5  Thermal Information
    6. 5.6  Power Dissipation
    7. 5.7  Electrical Characteristics
    8. 5.8  Switching Characteristics_RS-485_500kbps
    9. 5.9  Switching Characteristics_RS-485_20Mbps
    10. 5.10 Switching Characteristics, Driver_RS232
    11. 5.11 Switching Characteristics, Receiver_RS232
    12. 5.12 Switching Characteristics_MODE switching
    13. 5.13 Switching Characteristics_RS-485_Termination resistor
    14. 5.14 Switching Characteristics_Loopback mode
    15. 5.15 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Integrated IEC ESD and EFT Protection
      2. 7.3.2 Protection Features
      3. 7.3.3 RS-485 Receiver Fail-Safe Operation
      4. 7.3.4 Low-Power Shutdown Mode
      5. 7.3.5 On-chip Switchable Termination Resistor
      6. 7.3.6 Operational Data Rate
      7. 7.3.7 Diagnostic Loopback
      8. 7.3.8 Integrated Charge pump for RS-232
    4. 7.4 Device Functional Modes
      1. 7.4.1 RS-485 Functionality
      2. 7.4.2 RS-232 Functionality
      3. 7.4.3 Mode Control
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Data Rate and Bus Length for RS-485
        2. 8.2.1.2 Stub Length for RS-485 Network
        3. 8.2.1.3 Bus Loading for RS-485 Network
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Meets or exceeds the requirements of the TIA/EIA-485A and TIA/EIA-232F standards
  • 3 transmitters, 5 receivers for RS-232
  • 1 transmitter, 1 receiver for RS-485
  • On-chip switchable 120Ω termination resistor for RS-485 mode
  • Integrated charge-pump for RS-232 signaling
  • 3V to 5.5V supply voltage
  • 1.65V to 5.5V supply for logic data and control signals
  • RS-485 differential output exceeds 2.1V for PROFIBUS compatibility with 5V supply
  • Large output swing (typical ± 9V) for RS-232 mode
  • SLR Pin Selectable Data Rates:
    • RS-232 3T5R mode: 250kbps and 1Mbps
    • RS-485 half-duplex and full-duplex mode: 500kbps and 20Mbps
  • Bus I/O protection
    • ±16kV HBM ESD
    • ±8kV IEC 61000-4-2 contact and ±15kV air-gap discharge
    • ±4kV IEC 61000-4-4 fast transient burst
  • Diagnostic loopback for both RS-232 and RS-485 modes
  • Shutdown pin for low current consumption (10µA typical) in disabled state
  • Glitch-free power-up/down for hot plug-in capability
  • 1/8 unit load (up to 256 bus nodes) for RS-485
  • Open, short, and idle bus failsafe for RS-485 receiver
  • Bus short-circuit protection, thermal shutdown
  • Extended ambient temperature range: -40°C to 125°C
  • Space-saving thermally efficient 6mm x 6mm VQFN-40 package