Texas Instruments THVD1454DRCR

Overview

THVD1454DRCR from Texas Instruments is a half-duplex RS-485 transceiver with integrated 120 Ω switchable termination, slew rate control (500 kbps or 20 Mbps), ±16-kV HBM ESD protection, and operation from 3 V to 5.5 V supply. It supports PROFIBUS-compatible differential output (>2.1 V at 5 V) and failsafe operation across open/short/idle bus conditions - deployed in industrial motor drives and factory automation networks.

For engineers reviewing the THVD1454DRCR datasheet, THVD1454DRCR pinout, THVD1454DRCR application, or THVD1454DRCR equivalent, key selection criteria include configurable data rate via SLR pin, on-chip termination enable/disable via TERM pin, bus fault tolerance up to ±16 V, thermal shutdown at 150–170 °C, and compatibility with long-cable multi-point RS-485 topologies requiring <3 mA quiescent current.

Technical Context

The THVD1454DRCR implements a half-duplex RS-485 physical layer interface with dual-mode driver slew control: SLR = high enables 500-kbps operation with receiver-side low-pass filtering (~800 kHz cutoff), while SLR = low/floating enables full 20-Mbps signaling with no slew limiting. Its internal 120 Ω termination resistor (102–138 Ω over temp/voltage) is digitally enabled via TERM pin and remains linear across –6 V to +6 V common-mode range.

Receiver input thresholds are asymmetric: V_TH+ = –85 mV to –45 mV and V_TH– = –200 mV to –150 mV, with 30–50 mV hysteresis, ensuring robust noise immunity. Bus I/O pins feature ±8-kV IEC 61000-4-2 contact discharge protection and ±4-kV fast transient burst immunity, eliminating need for external TVS diodes in many industrial deployments.

Key Specifications

Pinout & Package

THVD1454DRCR uses a thermally efficient 10-pin VSON package (3 mm × 3 mm), with exposed thermal pad connected to GND for optimal junction-to-board thermal resistance (R_θJB = 21.9 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN65HVD1478DR and MAX14783EASA+, THVD1454DRCR uniquely integrates both termination and slew control in a 3×3 mm package, enabling single-PCB designs for heterogeneous-speed networks while reducing external component count by ≥3 per node.

Availability

THVD1454DRCR is available at Aetrix Electronics and suitable for factory automation, motor drives, and smart metering applications requiring stable component supply, long-lifecycle assurance, and guaranteed traceable sourcing.

Supply support for THVD1454DRCR 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 and embedded processing technologies, with decades of industrial interface IC expertise and broad qualification across automotive, industrial, and communications markets.

The THVD1454DRCR belongs to TI's robust RS-485 transceiver portfolio designed specifically for harsh industrial environments - emphasizing integrated protection, configurability, and thermal resilience in compact packages.

FAQ

What is the maximum bus fault voltage THVD1454DRCR can withstand?

The THVD1454DRCR supports ±16 V absolute maximum voltage on bus pins A and B, meaning it tolerates sustained short-circuits or miswiring events up to 16 V above or below ground without damage. This rating is specified in Absolute Maximum Ratings (Section 6.1) and verified across temperature and process corners - critical for deployment in unattended industrial fieldbus nodes where wiring faults may persist for hours.

How does the TERM pin control the internal 120 Ω resistor in THVD1454DRCR?

In THVD1454DRCR, the TERM pin is a digital input: applying VCC enables the 120 Ω resistor across A and B, while grounding or leaving it floating disables it. The resistor exhibits 102–138 Ω variation over temperature (–40 °C to +125 °C) and common-mode voltage (–7 V to +12 V), as characterized in Figures 8-1 and 8-2 - enabling reliable impedance matching without external calibration.

Does THVD1454DRCR support PROFIBUS DP communication?

Yes - THVD1454DRCR delivers ≥2.1 V differential output into 54 Ω at 5 V supply (Section 6.7), satisfying PROFIBUS DP Class 3 driver requirement (IEC 61158-2). Its 20 Mbps mode, ±16 V fault tolerance, and IEC 61000-4-2 Level 4 ESD rating make it suitable for PROFIBUS segments operating in electrically noisy factory environments.

What happens to the receiver output R when the bus is disconnected (open-circuit)?

When the bus is open-circuited, THVD1454DRCR's receiver enters failsafe mode and drives R high - guaranteed by internal biasing that pulls the differential input toward a valid high state. This behavior is confirmed in Table 8-2 and ensures UART receivers do not interpret floating bus lines as random data, preventing framing errors in PLC and RTU applications.

Can THVD1454DRCR operate from a 3.3 V supply while maintaining 20 Mbps data rate?

Yes - THVD1454DRCR supports 20 Mbps operation at VCC = 3.3 V, with typical driver rise/fall time of 5–9 ns and propagation delay of 14–22 ns (Section 6.9). Its 3–5.5 V supply range and rail-to-rail logic compatibility allow direct interfacing with 3.3 V microcontrollers without level shifters, simplifying design in modern low-voltage industrial controllers.