ST485 Datasheet, PDF (1/19 Pages) STMicroelectronics – Low power RS-485/RS-422 transceiver

ST485
Low power
RS-485/RS-422 transceiver
General features
I Low quiescent current: 300mA
I Designed for RS-485 interface application
I -7V to 12V common mode input voltage range
I Driver maintains high impedance in 3-state or
with the power OFF
I 70mV tipycal input hysteresis
I 30ns propagation delay, 5ns skew
I Operate from a single 5V supply
I Current limiting and thermal shutdown for
driver overload protection
I Allows up to 64 transceivers on the bus
Description
The ST485 is al low power transceiver for RS-485
and RS-422 communication. Each part contains
one driver and one receiver.
This transceiver draw 300mA (typ.) of supply
current when unloaded or fully loaded with
disabled drivers.
It operates from a single 5V supply.
DIP-8
SO-8
Driver is short-circuit current limited and is
protected against excessive power dissipation by
thermal shutdown circuitry that placed the driver
outputs into a high-impedance state.
The ST485 is designed for bi-directional data
communications on multipoint bus transmission
line (half-duplex applciations).
The ST485 is available in three temperature
range: commercial (0°C to 70°C), industrial (-
40°C to 850°C) and automotive (-55°C to 125°C)
Order code
Part number Temperature range
ST485CN
ST485BN
ST485XN
ST485CD
ST485BD
ST485CDR
ST485BDR
ST485XDR
0 to 70 °C
-40 to 85 °C
-55 to 125 °C
0 to 70 °C
-40 to 85 °C
0 to 70 °C
-40 to 85 °C
-55 to 125 °C
Package
DIP-8
DIP-8
DIP-8
SO-8 (Tube)
SO-8 (Tube)
SO-8 (Tape & reel)
SO-8 (Tape & reel)
SO-8 (Tape & reel)
Comments
50parts per tube / 40tube per box
50parts per tube / 40tube per box
50parts per tube / 40tube per box
100parts per tube / 20tube per box
100parts per tube / 20tube per box
2500 parts per reel
2500 parts per reel
2500 parts per reel
March 2006
Rev 12
1/19
www.st.com
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