ST485AB_07 Datasheet, PDF (1/19 Pages) STMicroelectronics – Very high speed low power RS-485/RS-422 transceiver

ST485AB
Very high speed
low power RS-485/RS-422 transceiver
Features
■ Low supply current: 5 mA max
■ High data rate > 30 Mbps
■ Designed for RS 485 interface applications
■ -7 to 12 common mode input voltage range
■ Driver maintains high impedance in 3-state or
with the power off
■ 70mV typical input hysteresis
■ Operate from single 5 supply
■ ±4 kV ESD protection
■ Current limiting and thermal shutdown for
driver overload protection
■ Latch-up free up to 500 mA
Description
The ST485A is a low power, high speed
transceiver for RS-485 and RS-422
communications. The device contains one driver
and one receiver in half duplex configuration. The
ST485A draws 3 mA (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 receiver
input has a fail-safe feature that guarantees a
logic high output if both inputs are open circuit.
DIP-8
SO-8
The ST485A is designed for bi-directional data
communications or multipoint bus transmission
lines.
Table 1. Device summary
Order code
Temperature
range
ST485ABN
-40 to 85 °C
ST485ABDR -40 to 85 °C
August 2007
Package
DIP-8
SO-8 (Tape & reel)
Rev. 3
Packaging
50parts per tube / 40tube per box
2500 parts per reel
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