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MAX1482, MAX1483
20µA, 1/8-Unit-Load, Slew-Rate-Limited, RS-485 Transceivers


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Description
FULL DATA SHEET (PDF, 604kB)
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The MAX1482 and MAX1483 are low-power transceivers for RS-485 and RS-422 communication. Both feature slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables. Data rates are guaranteed up to 250kbps.

The MAX1482/MAX1483 draw only 20µA of supply current. Additionally, they have a low-current shutdown mode that consumes only 0.1µA. Both parts operate from a single +5V supply.

Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit.
The MAX1482 is full duplex and the MAX1483 is half duplex. Both parts have a 1/8-unit-load input impedance that guarantees up to 256 transceivers on the bus.

Key Features   Applications/Uses
  • Low 20µA Operating Current
  • Slew-Rate Limited for Reduced EMI and Reduced Reflections
  • 0.1µA Low-Current Shutdown Mode
  • Designed for RS-485 and RS-422 Applications
  • Operate from a Single +5V Supply
  • -7V to +12V Common-Mode Input Voltage Range
  • Allows up to 256 Transceivers on the Bus—Guaranteed (1/8-unit load)
  • Current Limiting and Thermal Shutdown for Driver Overload Protection

 
  • Industrial Control Local Area Networks
  • Large 256-Node LANs
  • Low-Power RS-485/RS-422 Networks
  • Transceivers for EMI-Sensitive Applications

    Key Specifications:   RS-422/485 Line Driver/Receivers
    Part Number Number of Tx/Rx Duplex Supply Voltage (V) Typ. ICC (mA) Data Rate (kbps) Tx EN Rx EN Typ. Shutdown ICC (µA) Number of Rx/Tx on Bus Package Price**
    MAX1482  1Tx + 1Rx Full 5 0.02 250 Yes Yes 0.1 256 PDIP/14
    SOIC/14
    $1.15 @ 1k
    MAX1483  Half PDIP/8
    SOIC/8
    uMAX/8
    $1.15 @ 1k
    See All RS-422/485 Line Driver/Receivers (150)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX1482, MAX1483: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-0367; Rev 1; 2006-06-28
    This page last modified: 2007-05-29



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