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ST485ECDR Scheda tecnica(PDF) 1 Page - STMicroelectronics

Il numero della parte ST485ECDR
Spiegazioni elettronici  /-15 kV ESD protected, low power RS-485/RS-422 transceiver
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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February 2008
Rev 13
1/18
18
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
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.
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).
SO-8
Table 1.
Device summary
Order codes
Temperature
range
Package
Packaging
ST485EBD
-40 to 85 °C
SO-8 (Tube)
100parts per tube / 20tube per box
ST485ECDR
0 to 70 °C
SO-8 (Tape and reel)
2500 parts per reel
ST485EBDR
-40 to 85 °C
SO-8 (Tape and reel)
2500 parts per reel
ST485EXDR
-55 to 125 °C
SO-8 (Tape and reel)
2500 parts per reel
www.st.com


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