概要

Support is limited to customers who have already adopted these products.

The Intersil ISL81485 is a BiCMOS, 5V powered, single transceiver that meets both the RS-485 and RS-422 standards for balanced communication, and features a larger output voltage and higher data rate to benefit high speed applications. Unlike competitive devices, this Intersil transceiver is specified for 10% tolerance supplies (4. 5V to 5. 5V), and it delivers a much larger worst case differential output voltage (2. 0V compared to the typical 1. 5V) over the full supply range. The increased output voltage translates into longer reach, or better data integrity, at the 30Mbps data rate. This device presents a 1 unit load to the RS-485 bus, which allows up to 32 transceivers on the network. Receiver (Rx) inputs feature a fail-safe if open design, which ensures a logic high Rx output if Rx inputs are floating. Driver (Tx) outputs are short circuit protected, even for voltages exceeding the power supply voltage. Additionally, on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive.

ISL81485 Functional Diagram
ISL81485 Functional Diagram
  • Specified for 10% Tolerance Supplies
  • High Data Rates up to 30Mbps
  • Large Differential Output Voltage 2.0V(min.) into 54Ω
  • Drop-In Replacement for the ADM1485
  • One Unit Load Allows up to 32 Devices on the Bus
  • Low Quiescent Current 800µA
  • -7V to +12V Common Mode Input Voltage Range
  • Three State Rx and Tx Outputs
  • 15ns (Max) Propagation Delays, 5ns (Max) Skew
  • Operates from a Single +5V Supply (10% Tolerance)
  • Current Limiting and Thermal Shutdown for driver Overload Protection
  • Pb-free available

アプリケーション

  • SCSI "Fast 20" Drivers and Receivers
  • Factory Automation
  • Field Bus Networks
  • Security Networks
  • Building Environmental Control Systems
  • Industrial/Process Control Networks

ドキュメント

設計・開発

ECADモデル

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ECADモデルを調べる
Diagram of ECAD Models

製品選択

    Processing table
    Pkg. Type
    Carrier Type
    ご購入 / サンプル
    型名
    ISL81485IB
    circle廃止品
    memory
    view_in_ar
    		SOICN Tube
    ISL81485IB-T
    circle廃止品
    memory
    view_in_ar
    		SOICN Reel
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