Texas Instruments THVD1410DGKR

Overview

THVD1410DGKR from Texas Instruments is a half-duplex RS-485 transceiver in VSSOP-8 package, operating from 3.3 V to 5.5 V supply, delivering ≥2.1 V differential output at 5 V for PROFIBUS compliance, ±18-kV IEC 61000-4-2 contact ESD protection, and 500 kbps data rate - deployed in industrial motor drives and factory automation networks.

For engineers reviewing the THVD1410DGKR datasheet, THVD1410DGKR pinout, THVD1410DGKR application, or THVD1410DGKR equivalent, key selection criteria include its extended ±15-V common-mode range, <1 µA standby current, failsafe receiver (open/short/idle bus), 1/8 unit load (256-node capacity), and robust IEC EFT/ESD immunity enabling direct deployment in harsh industrial environments without external protection.

Technical Context

The THVD1410DGKR implements a half-duplex RS-485 interface with separate driver enable (DE, active-high, 2-MΩ internal pull-down) and receiver enable (RE, active-low, 2-MΩ internal pull-up), supporting bidirectional communication over long cables. Its receiver features large hysteresis (≥30 mV) and operates across ±15 V common-mode range, ensuring reliable signal detection under ground potential differences.

Driver output meets TIA/EIA-485A with differential voltage ≥2.1 V (min) at 5 V supply and 54-Ω load, while propagation delay is ≤500 ns (typ 250 ns) and rise/fall time ≤680 ns (typ 460 ns). Thermal shutdown activates at 170°C, and the device is characterized from –40°C to 125°C ambient.

Key Specifications

Pinout & Package

VSSOP-8 package (3.00 mm × 3.00 mm), thermally enhanced with exposed thermal pad (to be connected to GND).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RS-485 transceiver applications.

Compared with SN65HVD141DR and MAX14783EASA+, THVD1410DGKR delivers superior noise immunity via guaranteed 2.1-V V_OD and integrated thermal shutdown - making it optimal for PROFIBUS-critical and thermally constrained industrial edge nodes.

Availability

THVD1410DGKR is available at Aetrix Electronics and suitable for motor drives, factory automation & control, and grid infrastructure requiring stable component supply, long-term industrial qualification, and guaranteed availability through 2030.

Supply support for THVD1410DGKR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The THVD14xx family was designed specifically for rugged RS-485/RS-422 communication in harsh industrial environments - prioritizing ESD resilience, wide common-mode tolerance, and failsafe reliability over raw speed.

FAQ

What is the maximum data rate supported by THVD1410DGKR?

The THVD1410DGKR supports a maximum signaling rate of 500 kbps. This is confirmed in the device comparison table and switching characteristics section of the official datasheet. The 500-kbps limit applies across the full –40°C to 125°C temperature range and 3.3–5.5 V supply range. Higher-speed variants (e.g., THVD1450) reach 50 Mbps but use different internal driver circuitry - THVD1410DGKR is optimized for robustness, not speed.

Does THVD1410DGKR require external bus termination resistors?

Yes, THVD1410DGKR requires external 120-Ω termination resistors at the far ends of the RS-485 bus to prevent signal reflections. The device itself does not integrate termination. The recommended differential load resistance is 54 Ω (for RS-485 standard compliance), achieved by placing two 120-Ω resistors - one at each bus end - between A and B lines. Proper termination is essential to maintain signal integrity at 500 kbps over distances exceeding 10 meters.

How does the failsafe feature of THVD1410DGKR behave during an open bus condition?

During an open bus condition, the THVD1410DGKR receiver outputs a logic-high state at the R pin. This behavior is guaranteed by internal biasing that forces the receiver output high when differential voltage |V_ID| falls below the hysteresis threshold (≤30 mV). The same high output occurs during shorted (A=B) or idle (no driver active) bus states - preventing undefined logic levels and ensuring deterministic microcontroller input in fault scenarios.

Can THVD1410DGKR operate with a 3.3-V supply while maintaining PROFIBUS compliance?

No - PROFIBUS compliance requires ≥2.1 V differential output voltage (V_OD), which is only guaranteed at V_CC = 5 V ±10% per the datasheet. At 3.3 V supply, THVD1410DGKR delivers ≥1.5 V V_OD (min), sufficient for generic RS-485 but not PROFIBUS DP. For 3.3-V systems needing PROFIBUS, a level-shifter or 5-V local supply for the transceiver is required to meet the 2.1-V specification.

What is the function of the thermal pad on the THVD1410DGKR VSSOP-8 package?

The exposed thermal pad on the THVD1410DGKR VSSOP-8 package has no electrical function but serves a critical thermal role: it must be soldered to a GND plane on the PCB to reduce junction-to-board thermal resistance (R_θJB = 76.1°C/W). This improves heat dissipation during continuous 500-kbps operation at elevated ambient temperatures, preventing thermal shutdown and ensuring reliable operation up to 125°C ambient.