Texas Instruments SLLS563B Data Sheet

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SLLS563B − JULY 2003 − REVISED DECEMBER 2003

FEATURES APPLICATIONS Optimized for PROFIBUS Networks Process Automation − Meets the Requirements of EN 50170

Chemical Production

− Signaling Rates Up to 40 Mbps

Brewing and Distillation

− Differential Output Exceeds 2.1 V

Paper Mills

(54 Ω Load) − Low Bus Capacitance: 10 p F (Max) Factory Automation Meets the Requirements of TIA/EIA-485-A Automobile Production ESD Protection Exceeds ±10 k V HBM Rolling, Pressing, Stamping Machines

Failsafe Receiver for Bus Open, Short, Idle Networked Sensors

Up to 160 Transceivers on a Bus General RS-485 Networks Low Skew During Output Transitions and Motor/Motion Control Driver Enabling / Disabling

HVAC and Building Automation Networks

Common-Mode Rejection Up to 50 MHz Networked Security Stations Short-Circuit Current Limit Hot Swap Capable Thermal Shutdown Protection

DESCRIPTION These devices are half-duplex differential transceivers, with characteristics optimized for use in PROFIBUS (EN 50170) applications. The driver output differential voltage exceeds the Profibus requirements of 2.1 V with a 54-Ω load. A signaling rate of up to 40 Mbps allows technology growth to high data transfer speeds. The low bus capacitance provides low signal distortion. The SN65HVD1176 and SN75HVD1176 meet or exceed the requirements of ANSI standard TIA/EIA-485-A (RS-485) for differential data transmission across twisted-pair networks. The driver outputs and receiver inputs are tied together to form a half-duplex bus port, with one-fifth unit load, allowing up to 160 nodes on a single bus. The receiver output stays at logic high when the bus lines are shorted, left open, or when no driver is active. The driver outputs are in high impedance when the supply voltage is below 2.5 V to prevent bus disturbance during power cycling or during live insertion to the bus. An internal current limit protects the transceiver bus pins in short-circuit fault conditions by limiting the output current to a constant value. Thermal shutdown circuitry protects the device against damage due to excessive power dissipation caused by faulty loading and drive conditions. The SN75HVD1176 is characterized for operation at temperatures from 0°C to 70°C. The SN65HVD1176 is characterized for operation at temperatures from −40°C to 85°C.

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