Product details

Number of receivers 1 Number of transmitters 1 Duplex Half Supply voltage (Nom) (V) 5 Signaling rate (Max) (Mbps) 0.115 IEC 61000-4-2 contact (+/- kV) Fault protection (V) -70 to 70 Common mode range -20 to 25 Number of nodes 256 Features Fault protection Isolated No ICC (Max) (mA) 6 Rating Catalog Operating temperature range (C) -40 to 105
Number of receivers 1 Number of transmitters 1 Duplex Half Supply voltage (Nom) (V) 5 Signaling rate (Max) (Mbps) 0.115 IEC 61000-4-2 contact (+/- kV) Fault protection (V) -70 to 70 Common mode range -20 to 25 Number of nodes 256 Features Fault protection Isolated No ICC (Max) (mA) 6 Rating Catalog Operating temperature range (C) -40 to 105
PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9
  • 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
  • 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

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).

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).

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Technical documentation

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* Data sheet 70-V Fault-Protected RS-485 Transceivers with Cable Invert datasheet (Rev. A) 28 Sep 2012
User guide RS-485 Half-Duplex EVM User's Guide (Rev. C) 01 Sep 2021

Design & development

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Evaluation board

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Evaluation board

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Simulation model

SN65HVD1794 IBIS Model

SLLM097.ZIP (27 KB) - IBIS Model
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