The SN75176A differential bus
transceiver is a monolithic integrated circuit designed for bidirectional data
communication on multipoint bus-transmission lines. It is designed for balanced
transmission lines and meets ANSI Standard EIA/TIA-422-B and ITU Recommendation
V.11.The
SN75176A combines 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 active-high and active-low enables, respectively, that can be
externally connected together 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 whenever the driver is disabled or VCC = 0. These ports feature
wide positive and negative common-mode voltage ranges making the device suitable for
party-line applications.The driver is designed to handle loads
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.The SN75176A can be used in
transmission-line applications employing the SN75172 and SN75174 quadruple
differential line drivers and SN75173 and SN75175 quadruple differential line
receivers.The SN75176A is characterized for
operation from 0°C to 70°C.
