The STC3485E is +15 KV ESD protected, slew-rate limited, ultra lower differential line transceivers which provide full RS485 compatibility
while operating from single 3.3V supply. Each part contains one driver and one receiver, which is designed for data transmission
with extended common mode range (-7V to 12V). The STC3485E features slew-rate limited driver that minimizes EMI and reduces
reflections caused by improperly terminated cables, allowing error-free data transmission at data rate up to 500kbps.
All devices feature enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to
±15kV using IEC 1000-4-2 Air-Gap Discharge and ±15kV using the Human Body Model.
Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that
places 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, shorted or idle.
Both parts have power up/down glitch free driver outputs permit live insertion or removal of transceiver from/to data bus. The
CMOS design offers significant power savings without sacrificing ruggedness against overload or ESD damage. Typical quiescent
current is only 500 μA while operating and 1 μA in shutdown.
The STC3485E are fully specified over the commercial an extended industrial temperature range and are available in 8-pin and DIP
packages.