70-V Fault-Protected RS-485 Transceiver With Cable Invert - SN65HVD1794

SN65HVD1794 (ACTIVE)

70-V Fault-Protected RS-485 Transceiver With Cable Invert

 

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 human-body model specifications.

These devices combine a differential driver and a differential receiver, which operate from a single power supply. The driver differential outputs and the receiver differential inputs are connected internally to for a bus port suitable for half-duplex (two-wire bus) communication. A cable invert pin (INV) allows active correction of mis-wires that may occur during installation. Upon detecting communication errors, the user can apply a logic HIGH to the INV pin, effectively inverting the polarity of the differential bus port, thereby correcting for the reversed bus wires.

These devices feature a wide common-mode voltage range, making them suitable for multi-point applications over long cable runs. These devices are characterized from –40°C to 105°C.

For similar features with 3.3 V supply operation, see the SN65HVD1781 (SLLS877).

Features

  • Bus-Pin Fault Protection to > ±70 V
  • Cable Invert Function Allows Correction for Reversed Bus Pins
  • Common-Mode Voltage Range (–20 V to 25 V) More Than Doubles TIA/EIA
    485 Requirement
  • Bus I/O Protection
    • ±16 kV JEDEC HBM Protection
  • Reduced Unit Load for Up to 256 Nodes
  • Failsafe Receiver for Open-Circuit, Short-Circuit and Idle-Bus Conditions
  • Low Power Consumption
    • ICC 5 mA Quiescent During Operation
  • Power-Up, Power-Down Glitch-Free Operation

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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
Isolated
Signaling Rate (Max) (Mbps)
HBM ESD (kV)
IEC 61000-4-2 Contact (+/- kV)
Number of Nodes
Common Mode Range
Fault Protection (V)
Fail Safe
ICC (Max) (mA)
Rating
Operating Temperature Range (C)
Package Group
Pin/Package
SN65HVD1794 SN65HVD1780 SN65HVD1781 SN65HVD1782 SN65HVD1785 SN65HVD1786 SN65HVD1787 SN65HVD1791 SN65HVD1792 SN65HVD1793
5    3.3
5   
3.3
5   
3.3
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    Half    Full    Full    Full   
No    No    No    No    No    No    No    No    No    No   
0.115    0.115    1    10    0.115    1    10    0.115    1    10   
16    16    16    16    16    16    16    16    16    16   
N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A   
256    320    320    64    256    256    64    256    256    256   
-20 to 25    -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   
-70 to 70    -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   
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   
6    6    6    6    6    6    6    6    6    6   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 105    -40 to 105    -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   
PDIP
SOIC   
PDIP
SOIC   
PDIP
SOIC   
PDIP
SOIC   
PDIP
SOIC   
PDIP
SOIC   
PDIP
SOIC   
SOIC    SOIC    SOIC   
8PDIP
8SOIC   
8PDIP
8SOIC   
8PDIP
8SOIC   
8PDIP
8SOIC   
8PDIP
8SOIC   
8PDIP
8SOIC   
8PDIP
8SOIC   
14SOIC    14SOIC    14SOIC   

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