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    ST485EBDR

    The ST485E is a low power transceiver for RS485 and RS-422 communication. Each driver
    output and receiver input is protected against
    ± 15 kV electrostatic discharge (HBM) (ESD)
    shocks, without latch-up. These parts contain one
    driver and one receiver in half duplex
    configuration.
    This transceiver draws 300 µA (typ.) of supply
    current when unloaded or fully loaded with
    disabled drivers.
    It operates from a single 5 V supply.
    Driver is short-circuit current limited and is
    protected against excessive power dissipation by
    thermal shutdown circuitry that place the driver
    outputs into a high-impedance state.
    The ST485E is designed for bi-directional data
    communications on multipoint bus transmission
    lines (half-duplex applications).

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      SPECIFICATION

      ■ Low quiescent current: 300 µA
      ■ Designed for RS-485 interface application
      ■ – 7 V to 12 V common mode input voltage range
      ■ Driver maintains high impedance in 3-state or
      with the power OFF
      ■ 70 mV typical input hysteresis
      ■ 30 ns propagation delay, 5 ns skew
      ■ Operates from a single 5 V supply
      ■ Current limiting and thermal shutdown for
      driver overload protection
      ■ ESD protection:
      – ± 15 kV (HBM)
      – ± 8 kV (IEC-1000-4-2 contact discharge)
      ■ Allows up to 256 transceivers on the bus