This is information on a product in full production.
September 2013 DocID025158 Rev 2 1/18
ST4485EB
3.3 V powered, 15 kV ESD protected, up to 20 Mbps RS-485/
RS-422 transceiver
Datasheet - production data
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
Applications
Industrial systems control
Telecommunications
Description
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.
Table 1. Device summary
Order code Temperature range Package Packaging
ST4485EBDR -40 to 105 °C SO-8 (tape and reel) 2500 parts per reel
www.st.com
