Texas Instruments SN65HVD72D

Overview

SN65HVD72D from Texas Instruments is a 3.3-V half-duplex RS-485 transceiver in SOIC-8 package, supporting up to 250 kbps signaling rate, ±12 kV IEC 61000-4-2 contact ESD protection, and 80 mV receiver hysteresis for noise immunity in industrial bus networks.

For engineers reviewing the SN65HVD72D datasheet, SN65HVD72D pinout, SN65HVD72D application, or SN65HVD72D equivalent, this device delivers robust bus communication with low quiescent current (<2 µA standby), 5-V-tolerant logic inputs, and glitch-free power-up behavior-critical for factory automation and motion control designs requiring long-cable multi-drop reliability.

Technical Context

The SN65HVD72D integrates a single 3.3-V differential driver and receiver in half-duplex configuration, with internally connected A/B bus terminals forming a two-wire RS-485 port. Its wide common-mode range (–7 V to 12 V) enables operation over extended cable runs in electrically noisy environments.

It features active-high driver enable (DE) and active-low receiver enable (RE), enabling precise bus direction control. The device implements thermal shutdown at 170°C and supports up to 213 unit loads, allowing >200 nodes on a single bus segment without repeaters.

Key Specifications

Pinout & Package

SN65HVD72D is housed in an 8-pin SOIC package (4.91 mm × 3.90 mm), optimized for automated assembly and board-level EMI mitigation via ground-plane proximity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX13487EESA+ and ADM3485EARZ, SN65HVD72D uniquely combines 1/8-unit-load drive strength, integrated thermal shutdown, and guaranteed 213-node support - making it the only option among the three qualified for high-density industrial RS-485 networks with embedded fault resilience.

Availability

SN65HVD72D is available at Aetrix Electronics and suitable for factory automation, motion control, and building management systems requiring stable component supply across multi-year production lifecycles.

Supply support for SN65HVD72D 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 SN65HVD72D belongs to TI's SN65HVD7x family of 3.3-V RS-485 transceivers engineered for harsh industrial environments - emphasizing ESD robustness, wide temperature operation, and multi-node bus scalability.

FAQ

What is the maximum signaling rate supported by the SN65HVD72D?

The SN65HVD72D supports a maximum signaling rate of 250 kbps, with guaranteed timing performance including driver propagation delay ≤1.0 µs and receiver propagation delay ≤100 ns under recommended operating conditions. This rate is optimized for Modbus RTU, Profibus DP, and other deterministic industrial protocols requiring stable bit timing over long cables.

Does the SN65HVD72D include thermal protection?

Yes, the SN65HVD72D incorporates thermal shutdown circuitry that disables the driver outputs when the junction temperature reaches 170°C. This feature protects the device during sustained bus short-circuits or overheating conditions, and recovery occurs automatically once the die cools below the hysteresis threshold - a key reliability differentiator versus non-shutdown alternatives.

Can the SN65HVD72D operate with a 5-V microcontroller interface?

Yes, the SN65HVD72D features 5-V tolerant logic inputs (D, DE, RE), allowing direct connection to 5-V GPIOs without level-shifting circuitry. Its VCC supply remains strictly 3.3-V (3.0–3.6 V), but input pins safely accept voltages up to 5.7 V - simplifying integration with mixed-voltage control systems while maintaining RS-485 signal integrity.

What package options are available for the SN65HVD72D?

The SN65HVD72D is offered in an 8-pin SOIC package (D package, 4.91 mm × 3.90 mm). While the SN65HVD7x family also includes VSSOP and VSON variants, the "D" suffix specifically denotes the SOIC-8 variant - verified in TI's official orderable addendum and mechanical drawings for SN65HVD72D.

How many nodes can be connected to a single SN65HVD72D bus segment?

The SN65HVD72D presents only 1/8 unit load to the RS-485 bus, enabling up to 213 compliant nodes on a single segment without repeaters. This high node count stems from its ultra-low bus input leakage (<150 µA at VI = 12 V) and is explicitly confirmed in TI's Device Comparison Table - critical for large-scale sensor or actuator networks.