SN65HVD1781A-Q1 (ACTIVE)

Automotive, Fault-Protected RS-485 Transceivers With 3.3-V to 5-V Operation

 

Description

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

The SN65HVD1781A-Q1 combines 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 form a bus port suitable for half-duplex (two-wire bus) communication. This port features a wide common-mode voltage range, making the device suitable for multipoint applications over long cable runs. The device is characterized from –40°C to 125°C. The SN65HVD1781A-Q1 device is pin-compatible with the industry-standard SN75176 transceiver, making it a drop-in upgrade in most systems.

The device is 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

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1:
      –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESG Classification Level C3B
  • Bus-Pin Fault Protection to: > ±70 V
  • 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 During Operation
  • Pin-Compatible With Industry-Standard SN75176
  • Signaling Rates up to 1 Mbps

All trademarks are the property of their respective owners.

View more

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
SN65HVD1781A-Q1 SN65HVD1780-Q1 SN65HVD1781-Q1 SN65HVD1782-Q1
3.3
5   
3.3
5   
3.3
5   
3.3
5   
1    1    1    1   
1    1    1    1   
Half    Half    Half    Half   
No    No    No    No   
  0.115    1    10   
16    16    16    16   
N/A    N/A    N/A    N/A   
320    320    320    64   
-7 to 12    -7 to 12    -7 to 12    -7 to 12   
-70 to 70    -70 to 70    -70 to 70    -30 to 30   
Idle
Open
Short   
Idle
Open
Short   
Idle
Open
Short   
Idle
Open
Short   
6    6    6    6   
Automotive    Automotive    Automotive    Automotive   
-40 to 125    -40 to 125    -40 to 125    -40 to 125   
SOIC    SOIC    SOIC    SOIC   
8SOIC    8SOIC    8SOIC    8SOIC