ST490A_06 Datasheet, PDF (1/17 Pages) STMicroelectronics – Low power high speed RS-485/RS-422 transceiver

General features
s Low supply current: 5mA max
s -7V to 12V common mode input voltage range
s 70mV tipycal input hysteresis
s Designed for 25Mbps operation
s Operate from a single 5V supply
s ±4kV ESD protection
s Current limiting and thermal shutdown for
driver overload protection
Description
The ST490A is a low power transceiver for RS-
485 and RS-422 communications. The device
contains one driver and one receiver in full duplex
configuration. The ST490A draws 5mA (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 receiver
input has a fail-safe feature that guarantees a
logic high output if both inputs are open circuit.
ST490A
Low power high speed
RS-485/RS-422 transceiver
DIP-8
SO-8
Order code
Part number Temperature range
ST490ACN
ST490ABN
ST490ACDR
ST490ABDR
0 to 70 °C
-40 to 85 °C
0 to 70 °C
-40 to 85 °C
May 2006
Package
DIP-8
DIP-8
SO-8 (Tape & Reel)
SO-8 (Tape & Reel)
Rev 3
Packaging
50parts per tube / 40tube per box
50parts per tube / 40tube per box
2500 parts per reel
2500 parts per reel
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www.st.com
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