ST485EB Datasheet, PDF (1/18 Pages) STMicroelectronics – +/-15 kV ESD protected, low power RS-485/RS-422 transceiver

ST485EB
ST485EC - ST485EX
±15 kV ESD protected, low power
RS-485/RS-422 transceiver
Features
■ Low quiescent current: 300 µA
■ Designed for RS-485 interface application
■ -7 V to 12 V common mode input voltage range
■ Driver maintains high impedance in 3-state or
with the power OFF
■ 70 mV typical input hysteresis
■ 30 ns propagation delay, 5 ns skew
■ Operates from a single 5 V supply
■ Current limiting and thermal shutdown for
driver overload protection
■ ESD protection:
– ±15 kV (H.B.M.)
– ±8 kV (IEC-1000-4-2 contact discharge)
■ Allows up to 256 transceivers on the bus
Description
SO-8
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).
The ST485E is a low power transceiver for RS-
485 and RS-422 communication. Each driver
output and receiver input is protected against
±15 kV electrostatic discharge (H.B.M.) (ESD)
shocks, without latch-up. These parts contain one
driver and one receiver in half duplex
configuration.
This transceiver draws 300 µA (typ.) of supply
current when unloaded or fully loaded with
disabled drivers.
It operates from a single 5 V supply.
Table 1. Device summary
Order codes
Temperature
range
Package
Packaging
ST485EBD
ST485ECDR
ST485EBDR
ST485EXDR
-40 to 85 °C
0 to 70 °C
-40 to 85 °C
-55 to 125 °C
SO-8 (Tube)
SO-8 (Tape and reel)
SO-8 (Tape and reel)
SO-8 (Tape and reel)
100parts per tube / 20tube per box
2500 parts per reel
2500 parts per reel
2500 parts per reel
February 2008
Rev 13
1/18
www.st.com
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