Texas Instruments TCAN4550RGYR

Overview

TCAN4550RGYR from Texas Instruments is an automotive-grade CAN FD controller with integrated transceiver and SPI interface, supporting up to 5 Mbps data rate, ISO 11898-1:2015 and Bosch M_CAN Rev 3.2.1.1 protocol compliance, ±42 V bus fault protection, and 3.3–5 V I/O logic compatibility. It serves as a system-level CAN FD bridge between microcontrollers lacking native CAN FD support and high-reliability vehicle or industrial bus networks.

For engineers reviewing the TCAN4550RGYR datasheet, TCAN4550RGYR pinout, TCAN4550RGYR application, or TCAN4550RGYR equivalent, key selection criteria include its dual-mode operation (normal/standby/sleep/failsafe), integrated 5 V VCCOUT regulator, wake-up capability via WAKE pin or CAN bus pattern, and robust EMC performance per ISO 7637-3 and IEC 61000-4-2.

Technical Context

The TCAN4550RGYR integrates a fully compliant M_CAN controller core with configurable message RAM, TX/RX buffers, and hardware filtering, coupled with a high-immunity CAN FD transceiver featuring dominant timeout, thermal shutdown, and unpowered-bus high-impedance behavior. Its SPI slave interface operates at up to 18 MHz, enabling real-time message handling without CPU overhead.

It implements ISO 11898-2:2016 physical layer requirements including ±12 V common-mode range, differential output symmetry (VSYM < ±10%), and fast switching (tpHR ≤ 110 ns, tpLD ≤ 100 ns). The device supports local wake-up (LWU) and bus wake-up (WUP) with programmable filter timing (tWK_FILTER ≤ 1.8 µs) and timeout (tWK_TIMEOUT ≤ 2.9 ms).

Key Specifications

Pinout & Package

VQFN-20 (RGY) package, 4.50 mm × 3.50 mm, thermally enhanced with exposed pad soldered to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP2518FD-E/ML and TJA1044GT/3, the TCAN4550RGYR uniquely combines CAN FD controller, transceiver, 5 V regulator, and wake-up logic in one VQFN-20 package - reducing component count by ≥4 and enabling single-chip CAN FD node implementation in space- and power-constrained applications.

Availability

TCAN4550RGYR is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, off-highway telematics gateways, and medical imaging equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TCAN4550RGYR 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 decades of automotive qualification expertise and AEC-Q100-compliant product development.

The TCAN4550RGYR belongs to TI's automotive CAN FD interface portfolio, designed specifically to simplify high-speed, robust vehicle network integration for ECUs where space, power efficiency, and functional safety are critical.

FAQ

What is the maximum CAN FD data rate supported by the TCAN4550RGYR?

The TCAN4550RGYR supports CAN FD data rates up to 5 Mbps, as specified in the datasheet under recommended operating conditions. This capability is validated per ISO 11898-1:2015 and Bosch M_CAN Revision 3.2.1.1, and requires proper PCB layout, termination, and bus load management. The TCAN4550RGYR achieves this rate with minimal signal distortion due to its controlled slew-rate drivers and tight propagation delay matching (tpHR/tpLD skew ≤ 40 ns).

Does the TCAN4550RGYR require an external crystal, or can it accept a clock input?

The TCAN4550RGYR supports both configurations: a 20 MHz or 40 MHz fundamental crystal connected between OSC1 and OSC2, or a single-ended clock signal applied to OSC1 with OSC2 grounded. The device's oscillator circuit is designed for low-jitter operation and meets ±0.5% frequency tolerance at both frequencies, ensuring reliable CAN FD bit timing accuracy. No external load capacitors are needed when using the internal oscillator configuration.

How does the TCAN4550RGYR handle wake-up from sleep mode?

The TCAN4550RGYR supports two independent wake-up sources: local wake-up via the WAKE pin (accepting ±42 V pulses) and bus wake-up via ISO 11898-2 Wake-Up Pattern (WUP) on the CAN bus. Upon detection, it asserts nWKRQ within ≤1.8 µs (tWK_FILTER), exits sleep mode in ≤200 µs (tMODE_SLP_STBY), and enables VCCOUT within 1.5 ms (tMODE_SLP_STBY_VCCOUT_ON). The TCAN4550RGYR maintains <42 µA sleep current (ISUP) while monitoring for wake events.

What protection features does the TCAN4550RGYR include for automotive environments?

The TCAN4550RGYR integrates multiple automotive-grade protections: ±42 V bus fault tolerance on CANH/CANL, ±12 V common-mode range, HBM ±12 kV ESD on bus pins, IEC 61000-4-2 ±15 kV air discharge immunity, ISO 7637-3 Pulse 1/2a/3a/3b transient suppression, thermal shutdown (160 °C trip), and dominant time-out (1–5 ms) to prevent bus lock-up. These features are verified per AEC-Q100 stress testing and eliminate need for most external protection components in typical ECU designs.

Can the TCAN4550RGYR operate with a 3.3 V microcontroller SPI interface?

Yes, the TCAN4550RGYR supports 3.3 V to 5 V logic levels on its SPI interface (SCLK, SDI, SDO, nCS) and GPIO pins via the VIO supply pin. When VIO = 3.3 V, all digital inputs recognize VIH ≥ 2.31 V and VIL ≤ 0.99 V, and outputs drive VOH ≥ 2.64 V and VOL ≤ 0.66 V - ensuring robust interoperability with 3.3 V MCUs without level-shifting. The TCAN4550RGYR also tolerates VIO up to 5.25 V, enabling direct connection to 5 V systems.