Texas Instruments SN65HVD232DR

Overview

SN65HVD232DR from Texas Instruments is a 3.3-V, high-speed CAN bus transceiver compliant with ISO 11898-2, designed for industrial and building automation systems requiring robust differential communication up to 1 Mbps. It features ±16 kV HBM ESD protection on bus pins, thermal shutdown, open-circuit fail-safe operation, and operates across –40°C to 85°C ambient temperature.

For engineers reviewing the SN65HVD232DR datasheet, SN65HVD232DR pinout, SN65HVD232DR application, or SN65HVD232DR equivalent, this page delivers verified electrical characteristics, mode-specific timing behavior, bus voltage tolerance (–2 V to 7 V common-mode), and precise functional differentiation from SN65HVD230/SN65HVD231 variants - critical for CANopen, DeviceNet, and HVAC control system integration.

Technical Context

The SN65HVD232DR implements a fixed high-speed CAN physical layer interface without standby/sleep modes or slope control - unlike SN65HVD230/SN65HVD231. Its driver and receiver operate continuously when powered, with no RS pin functionality (RS = NC). The device uses internal biasing to maintain fail-safe dominant-state output during bus open conditions.

It supports bidirectional signal translation between single-ended logic (D/R) and differential CANH/CANL bus lines, with receiver input thresholds of 500–650 mV (VIT−) and 750–900 mV (VIT+), 100 mV hysteresis, and bus input resistance of 20–50 kΩ. Common-mode range is –2 V to 7 V; transient tolerance reaches ±25 V.

Key Specifications

Pinout & Package

SN65HVD232DR is housed in an SOIC-8 package (4.90 mm × 3.91 mm body size) with standard 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CAN transceiver applications.

Compared with SN65HVD232DR, both alternatives add RS pin functionality and VREF output - increasing BOM count and layout complexity without benefit in fixed high-speed, always-active deployments like industrial PLC backplanes or HVAC controllers.

Availability

SN65HVD232DR is available at Aetrix Electronics and suitable for industrial automation, building management systems, and telecom infrastructure projects requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for SN65HVD232DR 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 with over 50 years of innovation in industrial and automotive electronics.

The SN65HVD23x family was developed specifically for robust, 3.3-V CAN physical layer interfacing in harsh industrial environments - emphasizing ESD resilience, wide common-mode operation, and fail-safe behavior over power optimization.

FAQ

What is the function of the RS pin on SN65HVD232DR?

The RS pin on SN65HVD232DR is not connected internally (NC) and serves no functional purpose. Unlike SN65HVD230DR and SN65HVD231DR, the SN65HVD232DR lacks standby, sleep, or slope control modes - it operates exclusively in fixed high-speed mode. Leaving RS unconnected or tying it to GND/VCC has no effect on SN65HVD232DR behavior.

Does SN65HVD232DR support CAN FD?

No, SN65HVD232DR does not support CAN FD. It is specified only for classical CAN (ISO 11898-2) up to 1 Mbps. CAN FD requires higher slew rates, extended data phase timing, and different arbitration/data field handling - none of which are implemented in the SN65HVD232DR architecture or characterization.

What is the maximum bus length supported by SN65HVD232DR at 1 Mbps?

At 1 Mbps, SN65HVD232DR supports up to 40 meters of properly terminated twisted-pair cable (120 Ω), consistent with ISO 11898-2 recommendations. Longer distances require reduced bit rates - e.g., 500 kbps supports ~100 m, and 125 kbps supports ~500 m - due to signal propagation delay and attenuation limits.

Can SN65HVD232DR be used with 5-V microcontrollers?

SN65HVD232DR's D and R pins are 3.3-V logic compatible only. Direct connection to 5-V MCUs risks damaging the transceiver inputs/outputs. A level-shifter or 3.3-V IO buffer is required. The VCC pin must be supplied with 3.0–3.6 V; applying 5 V will exceed absolute maximum ratings and cause permanent damage to SN65HVD232DR.

Is thermal shutdown reset automatically after cooling?

Yes, SN65HVD232DR features automatic thermal shutdown recovery with 10 °C hysteresis. When junction temperature exceeds 165 °C, the device disables driver/receiver outputs until temperature falls below 155 °C, then resumes normal operation without external intervention - ensuring self-protection during sustained overloads or poor heatsinking.