Texas Instruments SNx5176B Differential Bus Transceivers

The Texas Instruments SN65176B and SN75176B devices combine a differential input line receiver and a 3-state differential line driver, which operate from a single 5V power supply. The driver has an active-high enable, and the receiver has an active-low enable, which can connect externally to function as a direction control. The receiver differential inputs and the driver differential outputs are connected internally to form differential input/output (I/O) bus ports designed to offer minimum loading to the bus when the driver is V_CC = 0 or is disabled. These ports feature wide negative and positive common-mode voltage ranges, making the device appropriate for party-line applications.

The driver is designed for up to 60mA of source or sink current. The driver features negative and positive thermal shutdown and current limiting for protection from line-fault conditions. Thermal shutdown is designed to occur at a junction temperature of approximately 150°C. The receiver features an input sensitivity of ±200mV, a minimum input impedance of 12kΩ, and a typical input hysteresis of 50mV.