Product details


Number of receivers 1 Number of transmitters 1 Duplex Half Supply voltage (Nom) (V) 3.3, 5 Signaling rate (Max) (Mbps) 20 IEC 61000-4-2 contact (+/- kV) 8 Fault protection (V) -15 to 15 Common mode range -12 to 12 Number of nodes 256 Features Extended common mode, IEC ESD protection, Surge protection Isolated No ICC (Max) (mA) 3 Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other RS-485 & RS-422 transceivers

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other RS-485 & RS-422 transceivers


  • Meets or Exceeds the Requirements of the TIA/EIA-485A Standard
  • 3 V to 5.5 V Supply Voltage
  • Bus I/O Protection
    • ± 16 kV HBM ESD
    • ± 8 kV IEC 61000-4-2 Contact Discharge
    • ± 30 kV IEC 61000-4-2 Air-Gap Discharge
    • ± 4 kV IEC 61000-4-4 Electrical Fast Transient
    • ± 2.5 kV IEC 61000-4-5 1.2/50-µs Surge
  • Available in Two Speed Grades
    • THVD1419: 250 kbps
    • THVD1429: 20 Mbps
  • Extended Ambient
    Temperature Range: -40°C to 125°C
  • Extended Operational
    Common-Mode Range: ± 12 V
  • Receiver Hysteresis for Noise Rejection: 30 mV
  • Low Power Consumption
    • Standby Supply Current: < 2 µA
    • Current During Operation: < 3 mA
  • Glitch-Free Power-Up/Down for Hot Plug-in Capability
  • Open, Short, and Idle Bus Failsafe
  • 1/8 Unit Load (Up to 256 Bus Nodes)
  • Industry Standard 8-Pin SOIC
    for Drop-in Compatibility

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open-in-new Find other RS-485 & RS-422 transceivers


THVD1419 and THVD1429 are half-duplex RS-485 transceivers with integrated surge protection. Surge protection is achieved by integrating transient voltage suppressor (TVS) diodes in the standard 8-pin SOIC (D) package. This feature provides a substantial increase in reliability for better immunity to noise transients coupled to the data cable, eliminating the need for external protection components.

Each of these devices operates from a single 3.3 V or 5 V supply. The devices in this family feature a wide common-mode voltage range which makes them suitable for multi-point applications over long cable runs.

The THVD1419 and THVD1429 devices are available in the industry standard SOIC package for easy drop-in without any PCB changes. These devices are characterized over ambient free-air temperatures from –40°C to 125°C.

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NEW THVD1439V PREVIEW 3.3-V to 5-V, 250-Kbps, RS-485 transceiver with integrated 4-kV IEC surge protection Integrates ±4kV IEC 61000-4-5 surge protection and supports 1.8-V to 5.5-V IO voltage range.

Technical documentation

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Type Title Date
* Data sheet THVD14x9 3.3-V to 5-V RS-485 transceivers with surge protection datasheet (Rev. C) Mar. 19, 2019
Technical article Frequently asked questions and answers for RS-485 transceivers Apr. 09, 2019
Technical article Can your RS-485 communication survive the great outdoors? Mar. 29, 2019
Application note Signal Integrity versus Data Rate and Cable Length for RS-485 Transceivers Dec. 05, 2018
User guide RS-485 Half-Duplex EVM User's Guide (Rev. B) Jun. 12, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide
The RS-485 half-duplex evaluation module (EVM) helps designers evaluate device performance, supporting fast development and analysis of data-transmission systems using any of the SN65HVD1x, SN65HVD2x, SN65HVD7x, SN65HVD8x and SN65HVD96 half-duplex transceivers. The EVM board comes without the RS-485 (...)

The EVM lets you quickly, easily and accurately evaluate TI's family of RS-485 products.

  • RS-485 half-duplex EVM PWB
  • Screw-type SMA jacks and Bergstik headers serve as the I/O connections
  • Banana jacks serve as the DC power input terminals

Design tools & simulation

SLLM421.ZIP (67 KB) - IBIS Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide

CAD/CAE symbols

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SOIC (D) 8 View options

Ordering & quality

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  • MSL rating/Peak reflow
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  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

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