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ST485ABDR

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Very high speed low power RS-485/RS-422 transceiver

Quantity $ per Unit Savings
1 - 9$2.900%
10 - 24$2.6210%
25 - 99$2.4715%
100 - 150$2.1028%
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In stock
$2.90
Parameter NameParameter Value
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius85.0
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
ROHS Compliance GradeEcopack3
GradeIndustrial
Package NameSO-8

The ST485A is a low power, high speed transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in half duplex configuration. The ST485A draws 3 mA (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 receiver input has a fail-safe feature that guarantees a logic high output if both inputs are open circuit.


The ST485A is designed for bi-directional data communications or multipoint bus transmission lines.

Key features
  • Latch-up free up to 500 mA
  • Current limiting and thermal shutdown for driver overload protection
  • Operate from single 5 supply
  • 70mV typical input hysteresis
  • Low supply current: 5 mA max
  • Designed for RS 485 interface applications
  • High data rate > 30 Mbps
  • Driver maintains high impedance in 3-state or with the power off
  • ±4 kV ESD protection
  • -7 to 12 common mode input voltage range