Texas Instruments SN65HVD75DGKR

Overview

SN65HVD75DGKR 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, and 80 mV receiver hysteresis, designed for industrial automation and motion control systems requiring robust noise immunity over long cable runs.

For engineers reviewing the SN65HVD75DGKR datasheet, SN65HVD75DGKR pinout, SN65HVD75DGKR application, or SN65HVD75DGKR equivalent, this device delivers high-speed differential communication with low quiescent current (<1 mA), 5-V-tolerant logic inputs, and glitch-free power-up behavior-critical for factory-floor and telecom infrastructure designs.

Technical Context

The SN65HVD75DGKR integrates a single 3.3-V driver and receiver in half-duplex configuration, supporting up to 20 Mbps signaling with <14 ns typical driver propagation delay and <70 ns receiver propagation delay under RS-485 load (RL = 54 Ω, CL = 50 pF). Its bus I/O pins withstand ±12 kV IEC 61000-4-2 contact discharge and ±4 kV IEC 61000-4-4 fast transient bursts.

It operates across –40°C to 125°C, features 5-V-tolerant DE/RE/D logic inputs, and maintains stable common-mode output voltage (VOC(SS) = VCC/2 ±1 V) with <200 mV peak-to-peak ripple. Driver differential output voltage is 1.5–2.0 V into 54 Ω, enabling reliable signal integrity on multi-point buses.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN65HVD75DGKR, SN65HVD72DR trades speed for lower cost and higher node count tolerance, while MAX13487EASA+ offers enhanced HBM protection but omits IEC-level surge hardening critical for industrial deployment.

Availability

SN65HVD75DGKR is available at Aetrix Electronics and suitable for factory automation, motion control, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for SN65HVD75DGKR 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 SN65HVD7x family was engineered specifically for rugged RS-485 communication in harsh industrial environments, emphasizing ESD resilience, wide temperature operation, and interoperability across multi-vendor networks.

FAQ

What is the maximum signaling rate supported by the SN65HVD75DGKR?

The SN65HVD75DGKR supports a maximum signaling rate of 20 Mbps, verified under RS-485 load conditions (RL = 54 Ω, CL = 50 pF) with typical driver propagation delay of 7–11 ns and receiver delay of 60–70 ns. This rate enables real-time motion control and high-throughput telemetry in industrial networks.

Does the SN65HVD75DGKR require external termination resistors?

Yes, the SN65HVD75DGKR requires an external 54 Ω termination resistor across bus lines A and B at each end of the RS-485 trunk to prevent signal reflections. The device itself does not integrate termination; its differential output voltage (1.5–2.0 V) is specified into that 54 Ω load per RS-485 standards.

Can the SN65HVD75DGKR operate with a 5-V microcontroller interface?

Yes, the SN65HVD75DGKR features 5-V-tolerant logic inputs (D, DE, RE), allowing direct connection to 5-V GPIOs without level shifters. Its VCC remains strictly 3.0–3.6 V, so only the logic-side pins-not the supply-accept 5-V signals.

What is the purpose of the RE and DE pins on the SN65HVD75DGKR?

The RE (active-low receiver enable) and DE (active-high driver enable) pins control half-duplex directionality: RE = low enables receiver output (R), DE = high enables driver outputs (A/B). Both asserted simultaneously cause bus contention; proper sequencing (e.g., DE low before RE high) avoids glitches.

Is the SN65HVD75DGKR suitable for operation beyond 125°C ambient?

No-the SN65HVD75DGKR is characterized and guaranteed for operation from –40°C to 125°C ambient temperature. Junction temperature must not exceed 150°C under operating conditions, and thermal shutdown activates at 170°C. For >125°C ambient, derating or heatsinking is required and not validated by TI.