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  4. LTC2873

Data Sheet Rev. B
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Overview

Features and Benefits

  • One RS485 or One RS232 Transceiver
  • 3V to 5.5V Supply Voltage
  • Up to 20Mbps RS485
  • Slew-Controlled RS232 Operation:
    • Selectable 1Mbps or 250kbps
  • Automatic Selection of Integrated RS485 (120Ω) and RS232 (5kΩ) Termination Resistors
  • High ESD: ±26kV HBM
  • Logic Loopback Mode
  • 1.7V to 5.5V Logic Interface
  • Supports Up to 256 RS485 Nodes
  • RS485 Receiver Failsafe Eliminates UART Lockup
  • H-Grade Available (–40°C to 125°C)
  • Available in 24-Pin 4mm × 5mm QFN Package

Product Details

The LTC2873 is a robust pin-configurable multiprotocol transceiver that supports RS232, RS485, and RS422 protocols while operating on a single 3V to 5.5V supply. The LTC2873 can be configured as a half-duplex RS485 transceiver or as an RS232 transceiver using the same two bus pins.

A pin-controlled integrated termination resistor allows for easy interface reconfiguration, eliminating external resistors and control relays. Loopback mode steers the driver inputs to the receiver outputs for diagnostic self-test. The RS485 receiver supports up to 256 nodes per bus, and features full failsafe operation for floating, shorted or terminated inputs.

An integrated DC/DC boost converter uses a tiny 2mm × 1.6mm inductor and one capacitor, eliminating the need for multiple supplies when driving RS232 levels.

Applications

  • Software Selectable RS232/RS485/RS422 Interface
  • Industrial Sensors and Actuators
  • Alarm Systems
  • Traffic Control and Monitoring
  • Highway Signs and Jumbo Displays

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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Documentation & Resources

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  • Data Sheets (1)
  • Reliability Data (1)
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  • Product Selection Guide (1)
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  • Technical Articles (1)
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    Tools & Simulations

    Linduino

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    Linduino code repository on GitHub and instructions on how to use the code.

    Purchase Linduino

    Linduino

    Code Files

    LTC2873 - DC2364A.ino

    IBIS Models

    Product Recommendations

    LTC2873 Companion Parts

    Recommended Related Parts

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    LTC2873CUFD#PBF Material Declaration Reliability Data 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
    LTC2873CUFD#TRPBF Material Declaration Reliability Data 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
    LTC2873HUFD#PBF Material Declaration Reliability Data 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
    LTC2873HUFD#TRPBF Material Declaration Reliability Data 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
    LTC2873IUFD#PBF Material Declaration Reliability Data 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
    LTC2873IUFD#TRPBF Material Declaration Reliability Data 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
    Wafer Fabrication Data R521 Reliability Data

    Support & Discussions

    LTC2873 Discussions

    RE: Using LTC2873 with VEE = 0V
    RE: LTM2881 and LTM2882 in Space Applications
    All LTC2873 Discussions
    LTC2873 Contact ADI Technical Support »
    LTC2873 Ask your question »
    LTC2873 Contact ADI Technical Support » LTC2873 Ask your question »

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    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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