SN65HVD1781 70-V Fault-Protected RS-485 Transceivers | TI.com

SN65HVD1781 (ACTIVE)

70-V Fault-Protected RS-485 Transceivers

70-V Fault-Protected RS-485 Transceivers - SN65HVD1781
 

Description

The SN65HVD178x devices are designed to survive overvoltage faults such as direct shorts to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications. The devices are also robust to ESD events with high levels of protection to the human-body-model specification.

The SN65HVD178x devices combine a differential driver and a differential receiver, which operate from a single power supply. In the SN65HVD1782, the driver differential outputs and the receiver differential inputs are connected internally to form a bus port suitable for half-duplex (two-wire bus) communication. This port features a wide common-mode voltage range, making the devices suitable for multipoint applications over long cable runs. These devices are characterized from –40°C to 125°C. These devices are pin-compatible with the industry-standard SN75176 transceiver, making them drop-in upgrades in most systems.

These devices are fully compliant with ANSI TIA/EIA 485-A with a 5-V supply and can operate with a 3.3-V supply with reduced driver output voltage for low-power applications. For applications where operation is required over an extended common-mode voltage range, see the SN65HVD1785 (SLLS872) data sheet.

Features

  • Bus-Pin Fault Protection to:
    • > ±70 V (SN65HVD1780, SN65HVD1781)
    • > ±30 V (SN65HVD1782)
  • Operation With 3.3-V to 5-V Supply Range
  • ±16-kV HBM Protection on Bus Pins
  • Reduced Unit Load for Up to 320 Nodes
  • Failsafe Receiver for Open-Circuit, Short-Circuit, and Idle-Bus Conditions
  • Low Power Consumption
    • Low Standby Supply Current, 1 µA Maximum
    • ICC 4-mA Quiescent Current During Operation
  • Pin-Compatible With Industry-Standard SN75176
  • Signaling Rates of 115 kbps, 1 Mbps, and up to 10 Mbps
  • Create a Custom Design using the SN65HVD178x with the WEBENCH® Power Designer

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Parametrics Compare all products in RS-485/RS-422

 
Supply Voltage(s) (Nom) (V)
No. of TX
No. of RX
Duplex
Signaling Rate (Max) (Mbps)
IEC 61000-4-2 Contact (+/- kV)
HBM ESD (kV)
Fault Protection (V)
Number of Nodes
Common Mode Range
ICC (Max) (mA)
Isolated
Rating
Operating Temperature Range (C)
Package Group
Approx. Price (US$)
SN65HVD1781 SN65HVD1780 SN65HVD1782 SN65HVD1785 SN65HVD1786 SN65HVD1787 SN65HVD1791 SN65HVD1792 SN65HVD1793 SN65HVD1794
3.3
5    
3.3
5    
3.3
5    
5     5     5     5     5     5     5    
1     1     1     1     1     1     1     1     1     1    
1     1     1     1     1     1     1     1     1     1    
Half     Half     Half     Half     Half     Half     Full     Full     Full     Half    
1     0.115     10     0.115     1     10     0.115     1     10     0.115    
N/A     N/A     N/A     N/A     N/A     N/A     N/A     N/A     N/A     N/A    
16     16     16     16     16     16     16     16     16     16    
-70 to 70     -70 to 70     -30 to 30     -70 to 70     -70 to 70     -30 to 30     -70 to 70     -70 to 70     -30 to 30     -70 to 70    
320     320     64     256     256     64     256     256     256     256    
-7 to 12     -7 to 12     -7 to 12     -20 to 25     -20 to 25     -20 to 25     -20 to 25     -20 to 25     -20 to 25     -20 to 25    
6     6     6     6     6     6     6     6     6     6    
No     No     No     No     No     No     No     No     No     No    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 105
-40 to 125    
-40 to 105     -40 to 105     -40 to 105     -40 to 105     -40 to 105