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Description
The ST3485E is ±15kV ESD protected, 3.3V low
power transceiver for RS-485 and RS-422
communications. The device contains one driver
and one receiver in half duplex configuration. The
ST3485E transmits and receives at a guaranteed
data rate of at least 12Mbps.
All transmitter outputs and receiver inputs are
protected to ±15kV using Human Body Model.
Driver is short-circuit current limited and is
protected against excessive power dissipation by
thermal shutdown circuitry that places the driver
General features
■ ESD protection
– ±15kV human body model
– ±8kV IEC 1000-4-2 contact discharge
■ Operate from a single 3.3V supply - no charge
pump required
■ Interoperable with 5V logic
■ 1µA low current shutdown mode max
■ Guaranteed 12Mbps data rate
■ -7 to 12 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