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

SN65HVD1781 (ACTIVE)

70-V Fault-Protected RS-485 Transceivers

Description

These 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. They are also robust to ESD events, with high levels of protection to the human-body-model specification.

These devices combine a differential driver and a differential receiver, which operate from a single power supply. In the 'HVD1782, 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 ('HVD1780, 81)
    • > ±30 V ('HVD1782)
  • 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 Max
    • ICC 4 mA Quiescent During Operation
  • Pin-Compatible With Industry-Standard SN75176
  • Signaling Rates of 115 kbps, 1 Mbps, and up to 10 Mbps
  • APPLICATIONS
    • HVAC Networks
    • Security Electronics
    • Building Automation
    • Telecomm Equipment
    • Motion Control
    • Industrial Networks

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Parametrics Compare all products in RS-485

 
Supply Voltage(s) (Nom) (V)
No. of TX
No. of RX
Duplex
Isolated
Signaling Rate (Max) (Mbps)
HBM ESD (kV)
Number of Nodes
Common Mode Range
Fault Protection (V)
Fail Safe
Rating
Operating Temperature Range (C)
Pin/Package
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    
No     No     No     No     No     No     No     No     No     No    
1     0.115     10     0.115     1     10     0.115     1     10     0.115    
16     16     16     16     16     16     16     16     16     16    
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    
-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    
Idle
Open
Short    
Idle
Open
Short    
Idle
Open
Short    
Idle
Open
Short    
Idle
Open
Short    
Idle
Open
Short    
Idle
Open
Short    
Idle
Open
Short    
Idle
Open
Short    
Idle
Open
Short    
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     -40 to 105     -40 to 105     -40 to 105     -40 to 104
-40 to 105    
8PDIP
8SOIC    
8PDIP
8SOIC    
8PDIP
8SOIC    
8PDIP
8SOIC    
8PDIP
8SOIC    
8PDIP
8SOIC    
14SOIC     14SOIC     14SOIC     8PDIP
8SOIC    
1.85 | 1ku     1.85 | 1ku     2.00 | 1ku     1.85 | 1ku     1.85 | 1ku     2.00 | 1ku     1.90 | 1ku     1.90 | 1ku     2.10 | 1ku     1.95 | 1ku    

Other qualified versions of SN65HVD1781

Version Part Number Definition
Automotive SN65HVD1781-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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