TJA1043T-1J - High-Speed CAN Transceiver, 5Mbit/s | NXP
MPN: TJA1043T-1J ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.76 | $276.00 |
| 500 | $2.41 | $1,205.00 |
| 1,000 | $2.07 | $2,070.00 |
| 2,500 | $1.84 | $4,600.00 |
TJA1043T-1J Overview
A CAN transceiver is an interface IC that translates single-ended logic-level TXD/RXD signals from a microcontroller into the differential voltage signaling required on the CANH and CANL bus wires, while simultaneously protecting the controller from bus-side ESD and EMC events. Within the broader hierarchy, the TJA1043 belongs to the class of bus transceivers (also called physical-layer devices or PHYs), which sit between the data-link-layer CAN controller and the physical CAN bus medium in an in-vehicle network.
Key features include very low quiescent current consumption in standby and sleep modes, passive bus behavior when supply is off (no reverse current into the bus), integrated thermal shutdown, and bus-pin ESD protection up to ±8 kV HBM. The VIO pin allows the logic supply to be tied directly to a 3.3V microcontroller without level shifters, simplifying mixed-voltage ECU designs.
Typical applications include automotive body and powertrain ECUs, gateway modules, ADAS sensor nodes, industrial CAN automation networks, and CAN-FD backbone segments where bus termination biasing and EMC robustness are critical. The SPLIT pin stabilizes the recessive bus common-mode voltage, especially important in networks with multiple unpowered nodes.
When designing with this device, keep the SPLIT pin terminated through a capacitor to ground per the datasheet reference design, and ensure the VIO and VCC rails are sequenced correctly to avoid latch-up during cold-crank events in 12V automotive systems.
Drop-in alternatives for TJA1043T-1J — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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TJA1043T/1J
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TCAN1043ADRQ1
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TJA1043T-1J Specifications
| Product Type | High-Speed CAN Transceiver |
| Protocol | CAN 2.0 A/B, CAN FD (physical layer) |
| Maximum Data Rate | 5 Mbit/s |
| Supply Voltage VCC | 4.5 V to 5.5 V |
| Logic Supply VIO | 2.8 V to 5.5 V |
| Operating Temperature Range | -40 °C to +150 °C (Tj) |
| Package | SOIC-14 |
| Mounting Type | Surface Mount |
| Bus Pins ESD (HBM) | ±8 kV |
| Common-Mode Range | -12 V to +12 V |
| Wake Input | Yes (WAKE pin) |
| Enable Pin | Yes (EN) |
| Standby Control | Yes (STBN) |
| SPLIT Pin | Yes |
| Compliance | ISO 11898-2:2024 |
| AEC-Q100 | Yes |
| RoHS | Compliant |
TJA1043T-1J Pin Configuration
| Pin 1 | TXD — Transmit data input from CAN controller (logic-level) |
| Pin 2 | GND — Ground |
| Pin 3 | VCC — 5V supply for bus driver |
| Pin 4 | RXD — Receive data output to CAN controller |
| Pin 5 | SPLIT — Stabilization output for bus common-mode voltage (to GND via capacitor) |
| Pin 6 | VIO — Logic supply for digital I/O pins (2.8–5.5V) |
| Pin 7 | EN — Enable control input (active-high) |
| Pin 8 | STBN — Standby control input (active-low) |
| Pin 9 | WAKE — Local wake-up input |
| Pin 10 | CANH — CAN high bus line |
| Pin 11 | CANL — CAN low bus line |
| Pin 12 | Reserved — Per datasheet pin mapping (verify in datasheet) |
| Pin 13 | Reserved — Per datasheet pin mapping (verify in datasheet) |
| Pin 14 | NC / EP — Not connected or exposed pad (verify in datasheet) |
Typical Applications
TJA1043T-1J is suitable for 6 applications: Automotive Body Control Module (BCM), CAN-FD Powertrain ECU (Engine/Transmission), ADAS Sensor CAN Node (Radar/Camera), Industrial CAN-FD Automation Network, Vehicle Central Gateway / Body Domain Controller, Off-Highway & Agricultural CAN Networks.
Automotive Body Control Module (BCM)
The TJA1043T-1J is a strong fit for automotive BCM CAN bus nodes thanks to its 5 Mbit/s CAN-FD capability, ±8 kV HBM ESD on bus pins, and AEC-Q100 automotive qualification. Its VIO supply pin lets it interface directly to 3.3V microcontrollers without level shifters, reducing BOM cost and PCB area. In a typical BCM the transceiver sits between the host MCU's CAN controller and the chassis CAN bus carrying lighting, mirror, and door-zone messages. The SPLIT pin stabilizes recessive common-mode voltage when multiple body ECUs are unpowered during parking, eliminating bus-drift-induced error frames during cold-crank. Standby/sleep modes with low quiescent current keep the BCM within typical <100 µA quiescent budgets required for parasitic-drain-sensitive vehicles.
Recommended
CAN-FD Powertrain ECU (Engine/Transmission)
In powertrain ECUs, the TJA1043T-1J provides the physical-layer robustness required for noisy under-hood electrical environments while supporting 5 Mbit/s CAN-FD for high-bandwidth torque and emissions data. Its -40 °C to +150 °C Tj range covers extreme under-hood thermal conditions, and the part's passive bus behavior when VCC is removed prevents reverse current flow that could disturb other in-progress CAN transactions during engine off-crank. The SPLIT pin stabilizes the bus common-mode voltage across the wide common-mode range of -12 V to +12 V, reducing EMC emissions in the high-current alternator environment. For OEMs designing new CAN-FD powertrain platforms, the TJA1043T-1J offers a mature, automotive-qualified PHY with extensive field data.
Recommended
ADAS Sensor CAN Node (Radar/Camera)
ADAS sensors such as front radar and surround-view camera ECUs require deterministic low-latency CAN communication with the central compute node, which the TJA1043T-1J's optimized loop-delay symmetry enables at CAN-FD arbitration rates up to 5 Mbit/s. The VIO pin allows direct interfacing with low-power 3.3V sensor MCUs, while ±8 kV HBM ESD on CANH/CANL protects against handling transients during sensor assembly and field replacement. SPLIT pin biasing prevents asymmetric bus drift when neighboring sensors enter standby. The transceiver's AEC-Q100 qualification and extended temperature range make it suitable for behind-the-bumper or windshield-mount sensor pod environments where ambient temperatures can swing rapidly.
Recommended
Industrial CAN-FD Automation Network
Industrial CAN-FD networks in factory automation, building HVAC, and process-control systems benefit from the TJA1043T-1J's robust EMC, ±8 kV ESD protection, and 5 Mbit/s data rate that future-proofs legacy 1 Mbit/s CAN lines. The SPLIT pin stabilizes long-cable backbones where common-mode voltages can drift significantly during faults. VIO support for 2.8–5.5V microcontrollers makes it compatible with the wide range of industrial MCUs from NXP, ST, and Renesas. Although the part is AEC-Q100 qualified, its industrial temperature grade and high ESD withstand make it equally suitable for factory-floor PLC I/O modules and variable-frequency drive control boards.
Recommended
Vehicle Central Gateway / Body Domain Controller
Central CAN gateways routing between powertrain, chassis, body, and infotainment domains rely on the TJA1043T-1J's SPLIT-pin biasing and passive-off behavior to manage complex mixed-powernet topologies. The transceiver's high common-mode range (-12V to +12V) tolerates ground-shift transients common in multi-domain vehicles where 12V battery feed lines cross multiple harnesses. The VIO supply pin allows gateway MCUs to operate at 3.3V while CAN bus signaling stays at standard 5V high-power levels, simplifying mixed-voltage system design. Its 5 Mbit/s CAN-FD support enables bandwidth-heavy gateway routing of ADAS sensor streams without protocol bottlenecks.
Recommended
Off-Highway & Agricultural CAN Networks
Off-highway equipment such as tractors, harvesters, and construction machines use CAN buses for engine, transmission, and implement-bus communication, where the TJA1043T-1J's wide operating temperature range and high ESD robustness protect against the harsher mechanical and electrical environment. The SPLIT pin and passive-off features support large CAN bus networks where many nodes may be temporarily unpowered during implement disconnects. Its AEC-Q100 grade and proven CAN-FD performance allow off-highway OEMs to leverage automotive supply-chain economies of scale, reducing unit costs versus specialized industrial CAN transceivers while delivering superior robustness.
Recommended
Recommended Products Summary
Engineering reference data for TJA1043T-1J — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TJA1043T/1J | TJA1443AT/0Z | TCAN1043ADRQ1 | TLE62513GEXUMA2 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments | Infineon |
| Package | SOIC-14 | SOIC-14 (same) | SOIC-14 (same) | SOIC-14 (same) | DSO-14 (SOIC-14 compatible) |
| Maximum Data Rate | 5 Mbit/s | 5 Mbit/s | 5 Mbit/s | 5 Mbit/s | 5 Mbit/s |
| VIO Logic Supply Pin | Yes (2.8–5.5V) | Yes | Yes | Yes | Yes |
| SPLIT Pin | Yes | Yes | Yes | Yes | Varies by variant |
| AEC-Q100 Qualification | Yes | Yes | Yes | Yes (-Q1 suffix) | Yes |
| Generation | 3rd gen (legacy current production) | 3rd gen (same die) | Next-gen (form-fit-functional replacement) | TI next-gen | Infineon equivalent |
| RoHS / Halogen-Free | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
Key Differentiators
- Mature NXP third-generation CAN-FD PHY with VIO and SPLIT (vs TJA1051T/3/1J)
- Direct pin-to-pin upgrade path to TJA1443AT (vs TCAN1043A (TI))
- AEC-Q100 qualified with ±8 kV HBM bus-pin ESD (vs TLE62513GXUMA2 (Infineon))
- Passive-off bus behavior protects ECU during supply loss (vs Generic CAN transceivers)
Design Notes
Place 100 nF decoupling capacitors as close as possible to the VCC and VIO pins, with a shared ground return via a low-impedance plane. The SPLIT pin must be terminated to ground through a 100 nF (typical) ceramic capacitor per the NXP reference design - this stabilizes the recessive bus common-mode voltage, especially important for networks with multiple unpowered nodes. Keep the CANH/CANL traces as a tightly coupled 100-ohm differential pair with 4x–5x dielectric spacing, and place the bus ESD protection (if external) within 10 mm of the connector.
Sequencing matters: ensure VIO is present before or simultaneously with VCC during cold-crank recovery to avoid logic-pin latch-up. The TJA1043T-1J supports passive-off behavior - when VCC is removed, the bus pins do not back-power the transceiver through CANH/CANL, protecting the ECU from parasitic battery drain. For standby/sleep current compliance, use the WAKE pin to selectively wake only intended nodes rather than holding the entire bus in standby.
Do not leave the SPLIT pin floating - it must have the recommended capacitor to ground or the bus common-mode voltage will drift, causing EMC issues and possible error frames in mixed-network segments. Do not operate without proper bus termination (typically 120 ohm at each end of the bus); unterminated CAN segments cause signal reflections that exceed the TJA1043T-1J's receiver common-mode range. Also verify the VIO supply level matches the host MCU's logic level - mismatched VIO (e.g., 5V MCU with 3.3V VIO) can damage MCU I/O cells or fail RXD logic thresholds.
Keep the TJA1043T-1J within 10 mm of the CAN bus connector to minimize common-mode coupling on unshielded stubs. Use a ground guard trace or via-fence around the bus traces to improve ESD/EMC immunity. The exposed pad (if any) must be soldered to a sufficiently large copper pour for thermal dissipation during sustained bus-fault conditions. Avoid routing the WAKE and STBN traces near noisy switching nodes - these pins are high-impedance and sensitive to capacitive coupling that can cause spurious wake events.
Compliance Information
RoHS compliant and halogen-free per NXP product page. AEC-Q100 qualified for automotive applications. Country of origin: Thailand.
