Texas Instruments TCAN3403DRBRQ1

Overview

TCAN3403DRBRQ1 from Texas Instruments is an AEC-Q100 qualified 3.3V automotive CAN FD transceiver in VSON-8 package, supporting classical CAN and CAN FD up to 8 Mbps with ±58V bus fault protection, 1.7V–3.6V I/O voltage range via VIO pin, and low-power standby mode with remote wake-up capability. It serves as the physical layer interface between MCU CAN controllers and automotive high-speed CAN buses in body control modules and ADAS systems.

For engineers reviewing the TCAN3403DRBRQ1 datasheet, TCAN3403DRBRQ1 pinout, TCAN3403DRBRQ1 application, or TCAN3403DRBRQ1 equivalent, key selection criteria include its VIO-based logic-level translation, ±30V common-mode input range, 95–180 ns total loop delay, thermal shutdown, TXD-dominant time-out, and compatibility with ISO 11898-2:2016.

Technical Context

The TCAN3403DRBRQ1 implements a differential driver/receiver pair with integrated VIO-supplied level-shifting logic interface, enabling direct connection to 1.8V/2.5V/3.3V MCUs without external level translators. Its symmetrical propagation delays (tPROP(LOOP1): 95–180 ns, tPROP(LOOP2): 120–180 ns) and tight timing symmetry (ΔtREC: –50 to +20 ns) ensure robust timing margins at 5–8 Mbps CAN FD data rates.

It operates across –40°C to 150°C junction temperature, features undervoltage detection on both VCC (2.75V rise / 2.5V fall) and VIO (1.6V rise / 1.4V fall), and supports three operational modes: normal (55 mA typical ICC), standby (1–4 µA ICC), and unpowered hot-plug state with high-impedance bus/logic pins.

Key Specifications

Pinout & Package

VSON-8 (DRB) package: 3 mm × 3 mm, wettable flanks for AOI, thermal pad connected to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCAN3403DRBRQ1, TCAN337GDRBRQ1 offers smaller size and lower cost but sacrifices VIO flexibility and 8 Mbps capability, while SN65HVD256DR provides legacy 5V compatibility at the expense of modern FD performance, power efficiency, and AEC-Q100 functional safety documentation.

Availability

TCAN3403DRBRQ1 is available at Aetrix Electronics and suitable for automotive body control modules, ADAS domain controllers, gateway ECUs, and infotainment head units requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.

Supply support for TCAN3403DRBRQ1 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 automotive, industrial, and personal electronics markets.

The TCAN340x-Q1 product line delivers AEC-Q100 qualified, functional-safety-capable CAN FD transceivers designed specifically for next-generation automotive networks demanding high-speed data transfer, ultra-low standby power, and robust EMC/ESD resilience.

FAQ

What is the maximum CAN FD data rate supported by the TCAN3403DRBRQ1?

The TCAN3403DRBRQ1 supports optimized CAN FD performance up to 8 Mbps in simplified networks, with certified operation up to 5 Mbps in full ISO 11898-2:2016-compliant heterogeneous networks. Its timing characteristics-including 95–180 ns total loop delay and ±20 ns receiver timing symmetry-enable reliable 8 Mbps operation when bus topology and termination meet specification requirements. TCAN3403DRBRQ1 achieves this while maintaining <1.5 V differential output voltage tolerance and <50 ns pulse skew.

Does the TCAN3403DRBRQ1 require an external level shifter when interfacing with a 1.8V microcontroller?

No, the TCAN3403DRBRQ1 does not require an external level shifter when interfacing with a 1.8V microcontroller. Its dedicated VIO pin accepts 1.7V–3.6V supply, establishing logic thresholds referenced to that voltage-enabling direct connection to 1.8V, 2.5V, or 3.3V MCUs. The TXD input threshold is 0.7×VIO, and RXD output swing is referenced to VIO, ensuring full signal integrity without added components. TCAN3403DRBRQ1 leverages this architecture to eliminate BOM cost and PCB space associated with discrete translators.

How does the TCAN3403DRBRQ1 handle undervoltage conditions on VCC and VIO supplies?

The TCAN3403DRBRQ1 incorporates independent undervoltage detection circuits on both VCC and VIO. VCC UVLO triggers at 2.75V (rising) and 2.5V (falling) with 120 mV hysteresis; VIO UVLO activates at 1.6V (rising) and 1.4V (falling) with 50 mV hysteresis. When either supply drops below its falling threshold, the device enters a defined fail-safe state: driver outputs go high-impedance, RXD is forced recessive, and bus pins remain isolated. This behavior prevents bus corruption during power ramp-up/down and is documented in the TCAN3403DRBRQ1 datasheet Section 6.6.

What package options are available for the TCAN3403DRBRQ1, and which one is used in this part number?

The TCAN3403DRBRQ1 is exclusively offered in the VSON-8 (DRB) package: 3 mm × 3 mm body with wettable flanks for automated optical inspection. While the TCAN3403-Q1 family also includes SOIC-8 (D) and SOT-23 (DDF) variants, the "DRBRQ1" suffix explicitly denotes the DRB package per Texas Instruments' orderable part numbering convention. This package features an exposed thermal pad that must be connected to PCB ground via multiple vias to achieve optimal thermal performance (RΘJB = 23.2 °C/W).

Can the TCAN3403DRBRQ1 enter ultra-low power shutdown mode like the TCAN3404-Q1?

No, the TCAN3403DRBRQ1 does not support ultra-low power shutdown mode. That feature is exclusive to the TCAN3404-Q1, which includes a dedicated SHDN pin to disable all internal blocks and reduce current to 2–5 µA. The TCAN3403DRBRQ1 supports only normal mode and low-power standby mode (1–4 µA), controlled via the STB pin. Its pinout omits SHDN functionality-pin 5 is VIO, not SHDN-and the datasheet clearly differentiates these variants in Section 4 (Device Comparison) and Table 5-1 (Pin Functions). Using TCAN3403DRBRQ1 in shutdown-critical applications requires external power gating.