SN75176BDR

The SN65176B and SN75176B differential bus
transceivers are designed for bidirectional data
communication on multipoint bus transmission lines.
They are designed for balanced transmission lines
and meet ANSI Standards TIA/EIA-422-B and TIA/
EIA-485-A and ITU Recommendations V.11 and X.27.
The SN65176B and SN75176B devices combine a
3-state differential line driver and a differential input
line receiver, both of which operate from a single 5-
V power supply. The driver and receiver have activehigh and active-low enables, respectively, that can
be connected together externally to function as a
direction control. The driver differential outputs and
the receiver differential inputs are connected internally
to form differential input/output (I/O) bus ports that
are designed to offer minimum loading to the bus
when the driver is disabled or VCC = 0. These ports
feature wide positive and negative common-mode
voltage ranges, making the device suitable for partyline applications.
The driver is designed for up to 60 mA of sink
or source current. The driver features positive
and negative current limiting and thermal shutdown
for protection from line-fault conditions. Thermal
shutdown is designed to occur at a junction
temperature of approximately 150°C. The receiver
features a minimum input impedance of 12 kΩ, an
input sensitivity of ±200 mV, and a typical input
hysteresis of 50 mV.