ST485E_07 Datasheet, PDF (1/19 Pages) STMicroelectronics – ±15KV ESD protected, low power RS-485/RS-422 transceiver

ST485E
±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 typical input hysteresis
■ 30ns propagation delay, 5ns skew
■ Operates 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 64 transceivers on the bus
Description
The ST485E is a 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.) (ESD)
shocks, without latch-up. These parts contain one
DIP-8
SO-8
driver and one receiver in half duplex
configuration.
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 place the driver
outputs into a high-impedance state.
The ST485E is designed for bi-directional data
communications on multipoint bus transmission
lines (half-duplex applications).
Order codes
Part numbers Temperature range
ST485ECN
ST485EBN
ST485EXN
ST485EBD
ST485ECDR
ST485EBDR
ST485EXDR
0 to 70 °C
-40 to 85 °C
-55 to 125 °C
-40 to 85 °C
0 to 70 °C
-40 to 85 °C
-55 to 125 °C
January 2007
Package
DIP-8
DIP-8
DIP-8
SO-8 (Tube)
SO-8 (Tape & reel)
SO-8 (Tape & reel)
SO-8 (Tape & reel)
Rev 11
Packaging
50parts per tube / 40tube per box
50parts per tube / 40tube per box
50parts per tube / 40tube per box
100parts per tube / 20tube per box
2500 parts per reel
2500 parts per reel
2500 parts per reel
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www.st.com
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