ST4485EBDR

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3.3 V Powered, 15 kV ESD protected, up to 20 Mbps RS-485/RS-422 transceiver, [-40oC, 105oC] temperature range

Quantity $ per Unit Savings
1 - 9$2.930%
10 - 24$2.6510%
25 - 40$2.5015%
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Parameter NameParameter Value
Supply Voltage Min Volt3.0
Supply Voltage Max Volt3.6
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius105.0
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
RoHs compliantEcopack3
GradeIndustrial
Package NameSO-8

The ST4485EB device is a ± 15 kV ESD protected, 3.3 V low power transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in half duplex configuration.


The ST4485EB transmits and receives at a guaranteed data rate of at least 20 Mbps.


All transmitter outputs and receiver inputs are protected to ± 15 kV using “Human Body Model”.


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

Key features
  • ESD protection
    • ± 15 kV human body model
    • ± 8 kV IEC 1000-4-2 contact discharge
  • Operate from a single 3.3 V supply - no charge pump required
  • Interoperable with 5 V logic
  • 1 μA low current shutdown mode max.
  • Guaranteed 20 Mbps data rate
  • -7 to 12 V common mode input voltage range
  • Half duplex versions available
  • Industry standard 75176 pinout
  • Current limiting and thermal shutdown for driver overload protection
  • Guaranteed high receiver output state for floating inputs with no signal present
  • Allow up to 64 transceivers on the bus
  • Wide operating temperature range: -40 to +105 °C