CA-IF4820HM

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RS-485/RS-422 Transceiver

The CA-IF48xx family of devices are low-power transceivers for RS-485/RS-422 communications in harsh environments. All devices have ±30V fault protection for overvoltage conditions on the bus lines that ensure robust protection for the communication interface. They also feature ±15V wide common-mode range (CMR), this feature was specifically designed for systems where there is a large common-mode voltage present due to either nearby electrically noisy equipment or large ground differences due to different earth grounds or long distance transmission. The bus pins of these devices are protected against ±15kV (for the full-duplex transceivers) and ±30kV (for the half-duplex transceivers) electro-static discharge (ESD) shocks, eliminating the need for additional system level protection components. The CA-IF48xx family of devices contains one driver(TX) and one receiver(RX), operates over the +3V to +5.5V supply range, making these devices convenient for designers to use one part with either +3.3V or +5V supply systems. The CA-IF48xxHS/HM/HD devices provide half duplex transceivers, and the CA-IF48xxFS/FM/FD devices provide full-duplex transceivers. The CA-IF4820 and CA-IF4850 can transmit and receive at data rates up to 20Mbps and up to 50Mbps respectively, while the CA-IF4805 is specified for data rates up to 500kbps. These devices also include fail-safe circuitry, guaranteeing a logic high receiver output when the receiver inputs are shorted or open. All devices are specified over the -40°C to +125°C wide operating temperature range and are available in small 8- pin MSOP, 8-pin DFN packages for space constrained applications and 8-pin SOIC for drop-in compatibility.

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  • Features

    High-Performance and Compliant with RS-485 EIA/TIA-485 Standard

    Low EMI 500kbps Data Rate (CA-IF4805) and up to 50Mbps (CA-IF4850), 20Mbps (CA-IF4820) High-Speed Data Rates
    1/8 Unit Load Enables up to 256 Nodes on the Same Bus

    Integrated Protection for Robust Communication

    ±30V Fault Protection Range on Driver Outputs/Receiver Inputs
    ±15V Common-Mode Voltage Range
    ±15kV Human Body Model ESD Protection for the Full-duplex Devices (CA-IF48xxFS/FM/FD)
    ±30kV Human Body Model ESD Protection for the Half-duplex Devices (CA-IF48xxHS/HM/HD)
    Short-Circuit Protection
    Thermal Shutdown
    True Fail-Safe Guarantees Known Receiver Output State

    Low Power

    960µA (max.) @ Receive Mode
    Shutdown Current < 5µA

    3V to 5.5V Supply Voltage Range

    Wide Operating Temperature Range

    –40°C to 125°C

    8 pin SOIC

    8 pin MSOP and 8 pin DFN Packages

  • Applications

    • Motor Drive

    • Factory Automation & Control

    • Grid Infrastructure

    • Home and Building Automation

    • Video Surveillance

    • Process Control

    • Telecommunication Equipment

  • Device Information

    Part numberPackagePackage size (NOM)  
    CA-IF48xxxDDFN83mm*3mm
    CA-IF48xxxMMSOP8
    CA-IF48xxxSSOIC83.9mm*4.9mm
  • Simplified Functional Diagram

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