TJA1043T/1U - High-Speed CAN Transceiver | NXP
N.º de pieza: TJA1043T/1U ✓ ActivoTJA1043T/1U Descripción general
A CAN transceiver, also called a CAN physical-layer interface, converts logic-level TXD and RXD signals into the differential voltage used on a CAN network. In the larger electronics hierarchy, it belongs to the CAN interface IC family, within the broader category of interface ICs and communication semiconductors. The CAN bus itself is a robust two-wire communication network commonly used in automotive electronics, industrial automation, transportation, and embedded control systems.
The TJA1043 provides separate TXD and RXD controller connections, control pins for standby and sleep behavior, and connections for the differential CANH and CANL conductors. The standby and sleep functions are useful in systems where low-power operation or controlled bus participation is required. The split-termination arrangement gives a board designer additional flexibility when configuring bus termination and EMC performance.
Operationally, the transceiver is intended for use with a separate CAN controller rather than as a standalone bus node. The controller generates transmit data and receives decoded bus information, while the TJA1043 translates between controller logic and the physical CAN bus. Its high-speed CAN positioning makes it appropriate for systems requiring reliable communication over longer in-vehicle or industrial cable runs when the associated controller, termination network, and wiring satisfy the required bus conditions.
Typical uses include automotive body and powertrain electronics, industrial automation equipment, robotics, elevator controls, building automation, and embedded CAN gateways. In these systems, the TJA1043 can sit between the physical bus and a controller such as a CAN controller MCU, an automotive communication processor, or an embedded communications bridge. Standby and sleep support helps designers balance responsive bus access against standby power.
The primary design consideration is preserving correct CAN bus termination and signal integrity. The split termination network must be configured according to the manufacturer application guidance, and the PCB should provide a short return path to the transceiver ground pins. Designers should also verify controller logic levels, enable-state polarity, transceiver supply requirements, and bus topology before releasing a production design.
This page consolidates the verified NXP and distributor references, distinguishes the available same-family and cross-brand drop-in candidates, and adds practical comparison, selection, and design guidance that is not consolidated on a typical distributor listing.
Alternativas directas para TJA1043T/1U — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
TJA1443AT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TJA1044T/1U
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TJA1045T/3/1J
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TCAN1043A
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TJA1043T/1U Especificaciones
| Product Type | High-speed CAN transceiver |
| CAN Transceiver Count | 1/1 |
| Bus Interface | Two-wire CAN bus |
| Controller Interface | TXD and RXD |
| Low-Power Modes | Standby and sleep modes |
| Encapsulado | 14-SO |
| Recuento de pines | 14 pins |
| Tipo de montaje | Surface mount |
Configuración de pines de TJA1043T/1U
| Pin 1 | TXD — Transmit data input from the CAN controller |
| Pin 2 | RXD — Receive data output to the CAN controller |
| Pin 3 | S — Split-termination connection |
| Pin 4 | NC — Not connected; confirm against the manufacturer datasheet |
| Pin 5 | VIO — I/O supply input |
| Pin 6 | GND — Ground connection |
| Pin 7 | CANL — CAN low-side bus connection |
| Pin 8 | CANH — CAN high-side bus connection |
| Pin 9 | GND — Ground connection |
| Pin 10 | VCC — Transceiver supply input |
| Pin 11 | STBN — Standby control input |
| Pin 12 | EN — Enable control input |
| Pin 13 | NC — Not connected; confirm against the manufacturer datasheet |
| Pin 14 | S — Split-termination connection |
Aplicaciones típicas
TJA1043T/1U es adecuado para 6 aplicacións: Automotive Body Control Modules, Industrial Automation Controllers, Robotics and Machine Control, Building Automation Networks, Electric Vehicle Charging Systems, Embedded CAN Gateways.
Automotive Body Control Modules
The TJA1043T/1U is suitable for an automotive body-control module that connects a CAN-capable microcontroller to a two-wire vehicle network. Its high-speed CAN transceiver role separates physical signaling from protocol handling, while standby and sleep modes can reduce activity during selected operating states. In this arrangement, TXD and RXD connect to the controller, CANH and CANL connect to the bus, and the split termination is implemented according to the manufacturer application guidance. The exact order code should be checked for operating-temperature and automotive-qualification requirements before production release.
Recomendado
Industrial Automation Controllers
The TJA1043T/1U can provide the physical-layer interface for industrial automation equipment such as motor controllers, sensor gateways, and PLC peripherals. Its 14-SO package supports compact surface-mounted PCB layouts, and its TXD/RXD interface allows a dedicated CAN controller or MCU peripheral to manage protocol traffic. Standby and sleep functions are useful when machinery alternates between active production and low-energy states. Industrial implementations must verify supply voltage, bus data rate, temperature range, grounding, and split-termination values against the NXP datasheet because those numerical limits were not included in the supplied records.
Recomendado
Robotics and Machine Control
The TJA1043T/1U is appropriate for CAN-connected robot controllers, motor drives, and remote actuator modules where deterministic command and status traffic must share a two-wire bus. A system controller supplies TXD and reads RXD, while the transceiver converts those logic signals into the differential CAN bus representation. The 14-SO package helps reduce board area compared with larger through-hole alternatives, and sleep or standby can be applied when a subsystem is inactive. Engineers should confirm maximum bus data rate and propagation timing for the selected controller and cable length before selecting termination and routing.
Recomendado
Building Automation Networks
The TJA1043T/1U can serve as the CAN physical-layer interface in building automation controllers for HVAC equipment, lighting panels, access controls, and environmental sensors. It allows a host controller to exchange messages over a shared differential bus while reducing the number of separate communication conductors. The transceiver’s standby and sleep modes support equipment that spends substantial time idle, while the 14-SO package enables compact controller boards. A production design should use the manufacturer’s split-termination implementation and verify EMC, grounding, bus length, and interoperability with every equipment type connected to the network.
Recomendado
Electric Vehicle Charging Systems
The TJA1043T/1U is applicable to CAN communication links within electric-vehicle charging equipment, battery-management interfaces, and vehicle-to-grid communication modules. It provides the physical bus connection for a CAN controller while TXD and RXD remain compatible with digital controller logic. Low-power operating states can benefit systems that periodically communicate or remain connected to a stationary charger. Because the verified records do not state isolation, surge protection, temperature, or automotive qualification, a charging-system designer must add the appropriate external protection and confirm that the exact NXP order code meets the end-product safety requirements.
Recomendado
Embedded CAN Gateways
The TJA1043T/1U fits embedded gateways that translate between a CAN bus and another communications interface such as Ethernet, serial, or a microcontroller-centric network. The CAN side requires a separate protocol controller, but the transceiver handles the physical differential signaling and gives the controller direct TXD and RXD access. Its small 14-SO package supports compact gateway boards, and standby or sleep modes can conserve power during low-traffic periods. Before using it as a generic industrial gateway element, verify logic-voltage compatibility, data-rate limits, wake behavior, termination, and the controller’s supported CAN standard.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TJA1043T/1U — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TJA1443AT | TJA1044T/1U | TJA1045T/3/1J | TCAN1043A |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments |
| Package | 14-SO | 14-SO - same package | 14-SO - same package | 14-SO - same package | 14-SO - same package |
| Product Type | High-speed CAN transceiver | CAN transceiver | High-speed CAN transceiver | High-speed CAN transceiver | High-speed CAN transceiver |
Diferenciadores clave
- Exact NXP order-code continuity (frente a TJA1443AT)
- Original NXP low-power feature set (frente a TJA1045T/3/1J)
- Single-manufacturer support path (frente a TCAN1043A)
- Established physical-layer role (frente a TJA1044T/1U)
Notas de diseño
Place the transceiver beside the CAN connector or bus header, and keep the CANH and CANL routes short, direct, and symmetrical. Avoid routing these conductors beneath digital clocks, switching regulators, or other high-current paths. The split-termination components should connect to the S pins using the exact topology shown in the NXP datasheet; changing the termination arrangement can alter signal amplitude, common-mode behavior, EMC performance, and fault tolerance.
Provide local decoupling at VCC and VIO and return those current paths directly to the transceiver ground pins. Check the manufacturer’s required input capacitance, voltage tolerances, sequencing rules, and power-up behavior before selecting capacitors. The supplied records do not contain these numerical requirements, so the official datasheet and application guidance must control the power network rather than relying on generic values.
Do not treat standby, sleep, enable, TXD, and RXD behavior as interchangeable when substituting a related transceiver. A pin-compatible replacement can still have different sleep timing, wake conditions, default pin states, or bus-driver behavior. Validate the MCU pull resistors, controller reset sequence, bus quiescent state, and state-transition timing with the exact alternative part before production release.
A CAN bus often extends beyond a single PCB, making common-mode energy and radiated emissions important. Use the manufacturer’s split-termination approach, provide a low-impedance chassis or signal-ground strategy appropriate to the installation, and apply the required bus filtering or protection at the connector. Validate emissions and immunity at the finished-system level because a laboratory bus arrangement may not reproduce field cable behavior.
Información de cumplimiento
The supplied verified records did not extract specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements for this exact order code. Compliance must be confirmed from the current NXP product declaration or manufacturer documentation.
