SN65HVD1176_08 Datasheet, PDF (1/19 Pages) Texas Instruments – PROFIBUS RS-485 TRANSCEIVERS

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SN65HVD1176
SN75HVD1176
SLLS563D – JULY 2003 – REVISED DECEMBER 2007
PROFIBUS RS-485 TRANSCEIVERS
FEATURES
1
• Optimized for PROFIBUS Networks
– Signaling Rates Up to 40 Mbps
– Differential Output Exceeds 2.1 V
(54 Ω Load)
– Low Bus Capacitance of 10 pF (Max)
• Meets the Requirements of TIA/EIA-485-A
• ESD Protection Exceeds ±10 kV HBM
• Failsafe Receiver for Bus Open, Short, Idle
• Up to 160 Transceivers on a Bus
• Low Skew During Output Transitions and
Driver Enabling / Disabling
• Common-Mode Rejection Up to 50 MHz
• Short-Circuit Current Limit
• Hot Swap Capable
• Thermal Shutdown Protection
APPLICATIONS
• Process Automation
– Chemical Production
– Brewing and Distillation
– Paper Mills
• Factory Automation
– Automobile Production
– Rolling, Pressing, Stamping Machines
– Networked Sensors
• General RS-485 Networks
– Motor/Motion Control
– HVAC and Building Automation Networks
– Networked Security Stations
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.
D PACKAGE
(TOP VIEW)
R
1
RE
2
DE
3
D
4
8
VCC
7
B
6
A
5
GND
LOGIC DIAGRAM (POSITIVE LOGIC)
A
D
B
DE
RE
R
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2007, Texas Instruments Incorporated