Renesas' half duplex and full duplex RS-485/RS-422 transceivers are available in a variety of speed grades to address any application needing reliable data transmission over twisted pair wiring.

RS-485 uses differential signals to enable long-distance data transmission, even in noisy environments. Also, the conventional RS-422 has been improved and its functionality has been expanded. RS-485 allows the use of up to 32 devices on the same data line. All of the slave devices on the RS-485 bus can communicate with the other 32 slave devices without having to go through the master device.

Features of the Renesas' RS-485/RS-422 Products

  • A line-up of various products, according to the needs of the system
    • High-speed communication support(~40Mbps)
    • PROFIBUS® support
    • Insulated products
    • 125 ℃ operation
  • Highest levels of noise tolerance and ESD protection

Documentation & Downloads

Title Other Languages Type Format File Size Date
Application Notes & White Papers
An Overview of Electromagnetic and Lightning Induced Voltage Transients Application Note PDF 677 KB
R15AN0002: RS-485 Transient Protection in Industrial DC-Supply Buses Application Note PDF 178 KB
3.3V High-Speed Opto-Isolated RS-485 Interface with RV1S9160A and ISL3178E Application Note PDF 247 KB
How to Simplify Industrial PC Interfaces 简体中文 White Paper PDF 920 KB
RS-485 Transceiver Tutorial 简体中文 White Paper PDF 246 KB
AN1991: Isolating RS-485 Interfaces with High-Speed Digital Optocouplers Application Note PDF 513 KB
Design Considerations for High-Speed RS-485 Data Links White Paper PDF 624 KB
AN1990: RS-485 Transceivers in J1708 Physical Layer Applications of Heavy Duty Vehicles Application Note PDF 826 KB
AN1987: RS-485 External Fail-Safe Biasing for Isolated Long Haul Buses Application Note PDF 443 KB
AN1986: External Fail-Safe Biasing of RS-485 Networks Application Note PDF 582 KB
AN1985: Transient Protection for the Standard RS-485 Transceiver: ISL3152E Application Note PDF 335 KB
AN1989: RS-422 vs RS-485: Similarities and Key Differences Application Note PDF 440 KB
AN1976: Important Transient Immunity Tests for RS-485 Networks Application Note PDF 338 KB
AN1979: Surge Protection simplified with Intersil's Overvoltage Protected (OVP) Transceivers Application Note PDF 500 KB
AN1977: Transient Voltage Suppressors: Operation and Features Application Note PDF 365 KB
AN1980: Ground Potential Differences: Origin and Remedies Application Note PDF 375 KB
AN1978: Surge Protection for Intersil's Standard RS-485 Transceivers Application Note PDF 369 KB
AN1593: Add a Loss of Signal (LOS) Indicator to Your RS-485 or RS-422 Transceiver Application Note PDF 559 KB
AN1474: High Temperature Behavior of ISL3158AE Application Note PDF 334 KB
AN1475: High Temperature Behavior of ISL3178AE Application Note PDF 299 KB
AN9867: End of Life Derating: A Necessity or Overkill Application Note PDF 338 KB
Other
R15ZZ0002: Calculating the Power Dissipation of an RS-485 Driver Others PDF 150 KB
R15ZZ0001: Calculating the Power Dissipation of an RS-422 Driver Others PDF 165 KB
TB506: Functional Principles of RS-485 Drivers and Receivers Others PDF 156 KB
TB509: Detecting Bus Signals Correctly with Failsafe Biased RS-485 Receivers Others PDF 240 KB
TB511: The Unit Load Concept Others PDF 253 KB
TB347: Tape and Reel Specification for Integrated Circuits Others PDF 752 KB
TB505: Understanding the Difference between HBM and IEC 61000-4-2 ESD Immunity Others PDF 254 KB