Electronic Design
  • Resources
  • Directory
  • Webinars
  • CAD Models
  • Video
  • Blogs
  • More Publications
  • Advertise
    • Search
  • Top Stories
  • Tech Topics
  • Analog
  • Power
  • Embedded
  • Test
  • AI / ML
  • Automotive
  • Data Sheets
  • Topics
    - TechXchange Topics --- Markets --AutomotiveAutomation-- Technologies --AnalogPowerTest & MeasurementEmbedded
    Resources
    Electronic Design ResourcesTop Stories of the WeekNew ProductsKit Close-UpElectronic Design LibrarySearch Data SheetsCompany DirectoryBlogsContribute
    Members
    ContentBenefitsSubscribeDigital editions
    Advertise
    https://www.facebook.com/ElectronicDesign
    https://www.linkedin.com/groups/4210549/
    https://twitter.com/ElectronicDesgn
    https://www.youtube.com/channel/UCXKEiQ9dob20rIqTA7ONfJg
    1. Technologies
    2. Components
    3. Electromechanical

    RS-485/RS-422 Serial Transceivers Now Can Hit 32 Mbits/s

    June 17, 2009
    The popular RS-485 and RS-422 serial data networks used in industrial automation can now be made better than ever thanks to Exar’s SP349x series of transceivers, which offer data rates to 32 Mbits/s and increased line protection. When designing new RS-485
    Staff

    The popular RS-485 and RS-422 serial data networks used in industrial automation can now be made better than ever thanks to Exar’s SP349x series of transceivers, which offer data rates to 32 Mbits/s and increased line protection. They’re also pin-compatible with Exar’s previous SP349x series transceivers. When designing new RS-485 and RS-422 hardware and next-generation industrial networks for process control, plant environmental control, and remote sensing and metering applications, you can get the extra speed often demanded.

    The SP3495E is a half-duplex RS-485 transceiver, while the SP3496E and RS3497E are full-duplex RS-485 transceivers. They all permit the implementation of bidirectional communications on a single multipoint/multidrop balanced bus transmission line. Each device contains one differential driver and one differential receiver. The family offers several choices: half-duplex, full-duplex, or full-duplex with enable/shutdown. Separate enable pins control the driver and receiver independently or may be externally connected together as a direction control.

    The transceivers operate from a single 3.3-V power supply and load the data bus only half as much as a standard RS-485 unit-load. This allows up to 64 devices to be connected simultaneously on a bus without violating required RS-485 signal margin and without using repeaters. Short-circuit protection and thermal shutdown prevent excessive power dissipation caused by bus contention or by shorting outputs to ground or a voltage source. This forces the driver output into a high impedance state if the absolute value of the output current exceeds 250 mA or if junction temperature exceeds 165°C.

    The advanced fail-safe feature guarantees a logic-high receiver output if the receiver’s differential inputs are shorted, open-circuit, or shunted by a termination resistor. All inputs and outputs have electrostatic discharge (ESD) protection. Bus-pins are ESD protected up to ±15 kV Human Body Model. Robust ESD protection, advanced fail-safe specifications, and hot-swap glitch protection are all vital features for critical applications like precision control of motor positioning in factory automation systems with high-speed communication.

    Samples of the SP3495E and SP3496E are available now in an eight-pin small-outline (SOIC) package supporting the –40°C to 85°C temperature range. In addition, samples of the SP3497E are available in a 14-pin SOIC package supporting the –40°C to 85°C temperature range. Lead-free and packages that comply with the European Union’s Restrictions on Hazardous Substances (RoHS) are available. In 1000-piece quantities, the SP349xE family price is $1.25.

    Exar Corp.

    ww.exar.com

    Continue Reading

    Upgrade Optoisolation Devices with Pin-to-Pin Semiconductor-Based Replacements

    Ensuring Robust Embedded-Memory Solutions in Automotive Apps

    Sponsored Recommendations

    Take Charge with Littelfuse Charging Solutions for Peak Performance in Material Handling EVs

    Nov. 28, 2023

    Nexperia Webinar: Application Specific MOSFETs and GaN Solutions for the Automotive Market

    Nov. 28, 2023

    TTI Transportation Resource Center

    Nov. 28, 2023

    Molex: What Happens When the Driver’s Seat is Empty?

    Nov. 28, 2023

    Comments

    To join the conversation, and become an exclusive member of Electronic Design, create an account today!

    I already have an account

    New

    Checking Out the NXP Hovergames NavQPlus

    TrustInSoft Helps Root Out Bugs to Deliver Reliable Code

    Edge AI: Rewards are Matched by Challenges

    Most Read

    Observability Framework Exposes DDS

    Quick Poll: Is right to repair a consideration when designing your product?

    MEMS Mirrors: The Next Big Wave in MEMS Technology


    Sponsored

    Communication in Industrial Networks

    LMG3422R030

    Use High-Current IGBT Drivers with Built-In Protection for Reliable Industrial Motor Control

    Electronic Design
    https://www.facebook.com/ElectronicDesign
    https://www.linkedin.com/groups/4210549/
    https://twitter.com/ElectronicDesgn
    https://www.youtube.com/channel/UCXKEiQ9dob20rIqTA7ONfJg
    • About Us
    • Contact Us
    • Advertise
    • Do Not Sell or Share
    • Privacy & Cookie Policy
    • Terms of Service
    © 2023 Endeavor Business Media, LLC. All rights reserved.
    Endeavor Business Media Logo