ST485ER_06 Datasheet, PDF (1/19 Pages) STMicroelectronics – ±15KV ESD protected, Low power RS-485/RS-422 transceiver

ST485ER
±15KV ESD protected, Low power
RS-485/RS-422 transceiver
General features
■ Low quiescent current: 300µA
■ Designed for RS-485 interface application
■ -7V to 12V common mode input voltage range
■ Driver maintains high impedance in 3-state or
with the power OFF
■ 70mV tipycal input hysteresis
■ 30ns propagation delay, 5ns skew
■ Operate from a single 5V supply
■ Current limiting and thermal shutdown for
driver overload protection
■ ESD protection:
– ±15KV (H.B.M.)
– ±8KV (IEC-1000-4-2 contact discharge)
■ Allows up to 256 transceivers on the bus
Description
The ST485E is al low power transceiver for RS-
485 and RS-422 communication. Each driver
output and receiver input is protected against
±15KV electrostatic discharge (H.B.M.) ±8KV
(IEC-1000-4-2 contact discharge) shocks, without
DIP-8
SO-8
latchup. These parts contain one driver and one
receiver.
This transceiver draws 300µA (typ.) of supply
current when unloaded or fully loaded with
disabled drivers.
It operates from a single 5V supply.
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.
The ST485E is designed for bi-directional data
communications on multipoint bus transmission
line (half-duplex applciations).
Order code
Part number Temperature range
ST485ERBN
ST485ERBDR
-40 to 85 °C
-40 to 85 °C
October 2006
Package
DIP-8
SO-8 (Tape & reel)
Rev 5
Packaging
50parts per tube / 40tube per box
2500 parts per reel
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www.st.com
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