Texas Instruments SN65HVD75D

Overview

SN65HVD75D from Texas Instruments is a 3.3-V, half-duplex RS-485 transceiver with 20 Mbps signaling rate, ±12 kV IEC 61000-4-2 contact ESD protection, 80 mV receiver hysteresis, and <2 µA standby supply current. It operates across –40°C to 125°C and supports up to 200 nodes on a single bus, targeting industrial automation and motion control systems.

For engineers reviewing the SN65HVD75D datasheet, SN65HVD75D pinout, SN65HVD75D application, or SN65HVD75D equivalent, this device delivers high-speed robust communication in harsh environments-especially where ESD resilience, low quiescent power, and wide common-mode range (–7 V to 12 V) are critical for reliable multi-drop RS-485 links.

Technical Context

The SN65HVD75D integrates a differential driver and receiver on a single 3.3-V supply, with internally connected A/B bus terminals enabling half-duplex operation. Its driver supports 60 mA short-circuit output and 1.5–2 V differential output voltage into 54 Ω (RS-485), while the receiver features –200 mV to –150 mV negative-going threshold and –70 mV to –20 mV positive-going threshold.

Control logic includes active-high DE (driver enable) and active-low RE (receiver enable), supporting independent driver/receiver disable states. Glitch-free power-up/power-down behavior ensures bus pins remain high-impedance during supply transitions, preventing false data transmission during system initialization or brownout conditions.

Key Specifications

Pinout & Package

SN65HVD75D is available in an 8-pin SOIC (D) package measuring 4.91 mm × 3.90 mm, optimized for automated assembly and thermal performance in industrial PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN65HVD72D and SN65HVD78D, the SN65HVD75D provides the most widely applicable trade-off: sufficient speed for modern industrial protocols (e.g., PROFIBUS DP, CANopen over RS-485), lower dynamic power than SN65HVD78D, and better bandwidth headroom than SN65HVD72D - making it the default choice for new 20-Mbps RS-485 designs.

Availability

SN65HVD75D is available at Aetrix Electronics and suitable for factory automation, motion control, and telecommunications infrastructure requiring stable component supply, long-term manufacturability, and guaranteed traceable sourcing.

Supply support for SN65HVD75D 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The SN65HVD75D belongs to TI's SN65HVD7x family of robust 3.3-V RS-485 transceivers designed specifically for demanding industrial environments where ESD resilience, wide temperature operation, and multi-node scalability are essential.

FAQ

What is the maximum signaling rate supported by the SN65HVD75D?

The SN65HVD75D supports a maximum signaling rate of 20 Mbps, verified under recommended operating conditions with 54 Ω RS-485 load and 50 pF capacitance. This rate is specified with typical rise/fall times of 2–7 ns and propagation delays of 7–17 ns, making SN65HVD75D suitable for high-speed industrial fieldbuses such as PROFIBUS DP and custom deterministic protocols.

Does the SN65HVD75D require external termination resistors?

Yes, the SN65HVD75D requires an external 120 Ω termination resistor at each end of the RS-485 bus to prevent signal reflections. While the device itself does not integrate termination, its 54 Ω differential output impedance is optimized to drive standard RS-485 loads, and the bus pins tolerate –13 V to +16.5 V - allowing safe use with externally placed terminations near connectors.

Can the SN65HVD75D operate with a 5-V logic controller?

Yes, the SN65HVD75D features 5-V tolerant logic inputs (D, DE, RE), meaning it accepts 0–5 V voltage levels regardless of its 3.3-V VCC supply. This eliminates the need for external level shifters when interfacing with legacy 5-V microcontrollers or FPGAs, simplifying design and reducing BOM count while maintaining signal integrity.

What is the purpose of the RE and DE pins on the SN65HVD75D?

The RE (receiver enable, active-low) and DE (driver enable, active-high) pins provide independent control of receiver and driver sections. When RE = low and DE = low, the SN65HVD75D enters listen-only mode; when RE = low and DE = high, it transmits and receives; when both are high, outputs go high-Z - enabling flexible half-duplex bus arbitration and power-saving states in the SN65HVD75D.

How does the SN65HVD75D handle ESD events on the bus lines?

The SN65HVD75D provides integrated protection: ±12 kV per IEC 61000-4-2 contact discharge and ±15 kV per HBM on bus pins A and B. This protection is achieved via internal silicon structures - no external TVS diodes are required for basic compliance. The device also withstands ±4 kV IEC 61000-4-4 fast transient bursts, ensuring reliable operation in electrically noisy industrial settings.