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RS-485 & RS-422 transceivers

SN65HVD78

ACTIVE

3.3 V Half-Duplex RS-485, with IEC ESD, 50 Mbps

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Data sheet

SN65HVD78

ACTIVE
Data sheet Order now

Product details

Number of receivers 1 Number of transmitters 1 Duplex Half Supply voltage (nom) (V) 3.3 Signaling rate (max) (Mbps) 50 IEC 61000-4-2 contact (±V) 12000 Fault protection (V) -13 to 16.5 Common-mode range (V) -7 to 12 Number of nodes 200 Features IEC ESD protection Isolated No Supply current (max) (µA) 950 Rating Catalog Operating temperature range (°C) -40 to 125
Number of receivers 1 Number of transmitters 1 Duplex Half Supply voltage (nom) (V) 3.3 Signaling rate (max) (Mbps) 50 IEC 61000-4-2 contact (±V) 12000 Fault protection (V) -13 to 16.5 Common-mode range (V) -7 to 12 Number of nodes 200 Features IEC ESD protection Isolated No Supply current (max) (µA) 950 Rating Catalog Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6 VSON (DRB) 8 9 mm² 3 x 3 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Small-size VSSOP Packages Save Board Space, or SOIC for Drop-in Compatibility
  • Bus I/O Protection
    • >±15 kV HBM Protection
    • >±12 kV IEC 61000-4-2 Contact Discharge
    • >±4 kV IEC 61000-4-4 Fast Transient Burst
  • Extended Industrial Temperature Range
    –40°C to 125°C
  • Large Receiver Hysteresis (80 mV) for Noise Rejection
  • Low Unit-Loading Allows Over 200 Connected Nodes
  • Low Power Consumption
    • Low Standby Supply Current: < 2 µA
    • ICC < 1 mA Quiescent During Operation
  • 5-V Tolerant Logic Inputs Compatible With
    3.3-V or 5-V Controllers
  • Signaling Rate Options Optimized for:
    250 kbps, 20 Mbps, 50 Mbps
  • Glitch Free Power-Up and Power-Down Bus Inputs and Outputs
  • Small-size VSSOP Packages Save Board Space, or SOIC for Drop-in Compatibility
  • Bus I/O Protection
    • >±15 kV HBM Protection
    • >±12 kV IEC 61000-4-2 Contact Discharge
    • >±4 kV IEC 61000-4-4 Fast Transient Burst
  • Extended Industrial Temperature Range
    –40°C to 125°C
  • Large Receiver Hysteresis (80 mV) for Noise Rejection
  • Low Unit-Loading Allows Over 200 Connected Nodes
  • Low Power Consumption
    • Low Standby Supply Current: < 2 µA
    • ICC < 1 mA Quiescent During Operation
  • 5-V Tolerant Logic Inputs Compatible With
    3.3-V or 5-V Controllers
  • Signaling Rate Options Optimized for:
    250 kbps, 20 Mbps, 50 Mbps
  • Glitch Free Power-Up and Power-Down Bus Inputs and Outputs

These devices have robust 3.3-V drivers and receivers in a small package for demanding industrial applications. The bus pins are robust to ESD events with high levels of protection to Human-Body Model and IEC Contact Discharge specifications.

Each of these devices combines a differential driver and a differential receiver which operate from a single 3.3-V 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. These devices feature a wide common-mode voltage range making the devices suitable for multi-point applications over long cable runs. These devices are characterized from –40°C to 125°C.

These devices have robust 3.3-V drivers and receivers in a small package for demanding industrial applications. The bus pins are robust to ESD events with high levels of protection to Human-Body Model and IEC Contact Discharge specifications.

Each of these devices combines a differential driver and a differential receiver which operate from a single 3.3-V 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. These devices feature a wide common-mode voltage range making the devices suitable for multi-point applications over long cable runs. These devices are characterized from –40°C to 125°C.
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Technical documentation

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Type Title Date
* Data sheet SN65HVD7x 3.3-V Supply RS-485 With IEC ESD protection datasheet (Rev. H) PDF | HTML 11 Mar 2019
EVM User's guide RS-485 Half-Duplex EVM User's Guide (Rev. C) PDF | HTML 01 Sep 2021
White paper RS-485 Basics Series 24 Feb 2021
Technical article A cost-effective option to get started with integrated position sensing PDF | HTML 11 Jul 2018
Technical article RS-485 basics: the RS-485 receiver PDF | HTML 09 Feb 2016
Technical article Designing an EMC-compliant interface to motor position encoders – Part 3 PDF | HTML 14 Sep 2015
EVM User's guide SN65HVD7x EVM User's Guide 09 Mar 2012

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