SN65HVD1176

SN75HVD1176

SLLS563C − JULY 2003 − REVISED APRIL 2005

PROFIBUS RS485 TRANSCEIVERS

FEATURES

− Meets the Requirements of EN 50170

− Signaling Rates Up to 40 Mbps

− Differential Output Exceeds 2.1 V

(54

Ω Load)

− Low Bus Capacitance: 10 pF (Max)

Driver Enabling / Disabling

DESCRIPTION

APPLICATIONS

−

Chemical Production

−

Brewing and Distillation

−

Paper Mills

−

Automobile Production

−

Rolling, Pressing, Stamping Machines

−

Networked Sensors

−

Motor/Motion Control

−

HVAC and Building Automation Networks

−

Networked Security Stations

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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LOGIC DIAGRAM (POSITIVE LOGIC)

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

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 2003, Texas Instruments Incorporated