ST485ERB

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15 kV ESD protected, low-power RS-485/RS-422 transceiver

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Product overview

Description

The ST485ERB is a low-power transceiver for RS-485 and RS-422 communication. Each driver output and receiver input is protected against ±15 kV electrostatic discharge (HBM) ± 8 kV (IEC-1000-4-2 contact discharge) shocks, without latch-up. These parts contain one driver and one receiver.

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.

The driver is a short-circuit current which is limited and protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state.

The ST485ERB is designed for bi-directional data communication on multipoint bus transmission lines (half-duplex applications).

  • All features

    • Low quiescent current: 300 µA
    • Designed for RS-485 interface applications
    • - 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 64 transceivers on the bus

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STMicroelectronics - ST485ERB

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST485ERBDR
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SO-8 Industrial Ecopack3

ST485ERBDR

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SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-8

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Industrial

RoHS Compliance Grade

Ecopack3

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors