DS96176CN Datasheet | National Semiconductor

DS96176 RS-485/RS-422 Differential Bus Transceiver May 1998 DS96176 RS-485/RS-422 Differential Bus Transceiver General Description The DS96176 Differential Bus Transceiver is a monolithic integrated circuit designed for bidirectional data munication on balanced multipoint bus transmission lines. The transceiver meets EIA Standard RS-485 as well as RS-422A. The DS96176 bines a TRI-STATE® differential line driver and a differential input line receiver, both of which operate from a single 5.0V power supply. The driver and receiver have an active Enable that can be externally connected to function as a direction control. The driver differential outputs and the receiver differential inputs are internally connected 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 when VCC = 0V. These ports feature wide positive and negative mon mode voltage ranges, making the device suitable for multipoint applications in noisy environments. The driver is designed to handle loads up to 60 m A 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 junction temperature of approximately 160˚C. The receiver Features a typical input impedance of 15 kΩ, an input sensitivity of ±200 m V, and a typical input hysteresis of 50 m V. The DS96176 can be used in transmission line applications employing the DS96172 and the DS96174 quad differential line drivers and the DS96173 and DS96175 quad differential line receivers. Features n Bidirectional transceiver n Meets EIA Standard RS-422A and RS-485 n Designed for multipoint transmission n TRI-STATE driver and receiver enables n Individual driver and receiver enables n Wide positive and negative input/output bus voltage ranges n Driver output capability ±60 m A Maximum n Thermal shutdown protection n Driver positive and...