TJA1042AT/3/0Z - 5Mbps CAN Transceiver | NXP
N.º de pieza: TJA1042AT/3/0Z ✓ ActivoTJA1042AT/3/0Z Descripción general
A CAN transceiver is an interface IC that converts logic-level TXD and RXD signals into the differential CANH and CANL bus signals used by Controller Area Network systems. Within the hierarchy of CAN interface ICs, physical-layer transceivers connect automotive and industrial network controllers to the bus while adding bus protection, standby behavior, and standardized digital interfaces. The TJA1042 family is specifically designed for high-speed automotive CAN networks.
Principal features include a maximum CAN data rate of 5 Mbps, one-transceiver one-receiver organization, differential bus output, low-power Standby mode, and VIO support in the /3 version. The separate VIO rail allows the controller-facing pins to operate from a lower voltage while CANH, CANL, and the transceiver core use the 5 V supply. The Arrow product listing identifies the device as an automotive AEC-Q100 8-pin SOIC transceiver.
The TJA1042AT/3/0Z uses pin 5 as VIO rather than the SPLIT common-mode stabilization function found on the TJA1042T version. This distinction is important during replacement because the two suffix families do not have identical pin 5 functions. The /3 device also provides bus wake-up capability and passive behavior when unpowered, characteristics that support low-power automotive networking and robust bus integration.
Typical applications include automotive body and chassis control modules, powertrain and gateway controllers, industrial CAN equipment, robotics, and embedded transport systems. It is particularly suitable where a microcontroller or dedicated CAN controller requires a 5 Mbps physical interface while its digital I/O operates at 3.3 V. The low-power Standby function helps reduce current consumption when the node is not actively communicating.
When laying out a circuit, place the transceiver close to the CANH and CANL connector, keep the bus traces short and matched, and provide the decoupling and common-mode components recommended by the NXP TJA1042 manufacturer datasheet. Verify that VIO is connected correctly on the /3 version and that PCB exposure, automotive qualification, and temperature requirements match the intended installation.
This page combines the NXP manufacturer datasheet, product listings, verified drop-in candidates, interface comparisons, and practical PCB guidance. It helps engineers identify the correct /3 variant, distinguish VIO from SPLIT implementations, and plan a CAN transceiver layout without relying on a generic SOIC-8 pinout.
Alternativas directas para TJA1042AT/3/0Z — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
TJA1042BT/3/0Z
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TJA1042BT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TCAN1042H
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TCAN1044A-Q1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TJA1042AT/3/0Z Especificaciones
| Product Type | High-speed CAN transceiver |
| CAN Data Rate | 5 Mbps |
| Transceiver Configuration | 1 transceiver, 1 receiver |
| Primary Supply Voltage | 5 V |
| Controller Interface Supply | VIO for 3.3 V or 5 V controller interfacing |
| Bus Interface | Differential two-wire CANH/CANL |
| Low-Power Mode | Standby with bus wake-up capability |
| Unpowered Behavior | Passive |
| Encapsulado | 8-pin SOIC, 3.90 mm width |
| Automotive Qualification | AEC-Q100 qualified |
| Estado RoHS | ROHS3 compliant |
| Tipo de montaje | Surface mount |
| TXD Interface | 1 digital input |
| RXD Interface | 1 digital output |
| SPLIT Pin Function | Not used on the /3 version; pin 5 is VIO |
Configuración de pines de TJA1042AT/3/0Z
| Pin 1 | TXD — Transmitter data input from the CAN controller |
| Pin 2 | GND — Ground connection |
| Pin 3 | VIO — Controller-side I/O supply input |
| Pin 4 | RXD — Receive data output to the CAN controller |
| Pin 5 | VIO — Controller-side I/O supply for the /3 version |
| Pin 6 | CANL — CAN low bus output and input |
| Pin 7 | CANH — CAN high bus output and input |
| Pin 8 | VCC — Transceiver positive supply input |
Aplicaciones típicas
TJA1042AT/3/0Z es adecuado para 6 aplicacións: Automotive Body Control Module, Vehicle Gateway Controller, Industrial CAN Control System, Robotics and Motion Controller, Embedded Transport and Diagnostics, Low-Power CAN Sensor Network.
Automotive Body Control Module
The TJA1042AT/3/0Z fits an automotive body-control node that connects a 3.3 V or 5 V controller to a 5 Mbps CAN network. Its VIO supply lets the controller-side TXD and RXD interface use a lower logic voltage while the CAN transceiver core operates from 5 V. The device is identified as AEC-Q100 qualified and automotive, while Standby mode reduces activity when the node is idle. In a distributed vehicle network, the differential CANH and CANL interface supports robust communication between door, lighting, climate, and seat controllers. Layout remains critical: route the bus pair as a controlled impedance-coupled pair, keep them away from switching nodes, and place protection and common-mode components close to the external connector.
Recomendado
Vehicle Gateway Controller
A vehicle gateway can use the TJA1042AT/3/0Z to connect a domain controller or gateway processor to a high-speed CAN backbone. The 5 Mbps transceiver rate provides sufficient bandwidth for supervisory messages, status transfer, and distributed vehicle functions, while the /3 VIO interface supports direct connection to modern controller logic. Standby mode and bus wake-up capability are useful for modules that spend substantial time in reduced-power states. The design should use the NXP application guidance for bus biasing and termination, preserve symmetry between CANH and CANL, and verify that the external common-mode and ESD network does not degrade signal integrity or automotive transient requirements.
Recomendado
Industrial CAN Control System
The TJA1042AT/3/0Z is suitable for industrial controllers, remote I/O stations, and factory equipment that use a high-speed CAN network. The 5 Mbps bus interface provides a practical balance between throughput, cable length, and electromagnetic-control requirements for short industrial networks. VIO allows the TXD and RXD side to operate from 3.3 V while the physical transceiver uses 5 V, making the part useful with modern embedded processors. For reliable deployment, provide local decoupling, use the datasheet-recommended common-mode network, establish a low-impedance ground reference, and isolate noisy switching converters and relay drivers from the CAN route.
Recomendado
Robotics and Motion Controller
The TJA1042AT/3/0Z can connect a robot controller to motor, sensor, and safety subsystems operating on a CAN network. The 5 Mbps interface accommodates frequent command and status traffic on compact mobile robots, while the VIO input supports 3.3 V controller logic. Standby mode is valuable for battery-powered platforms because it reduces current use when communication is not continuously required, and bus wake-up can support coordinated activation of distributed modules. The physical implementation should maintain a short differential pair, use common-mode protection suited to motor environments, and keep CAN routing away from high-current motor paths to reduce radiated and conducted interference.
Recomendado
Embedded Transport and Diagnostics
The TJA1042AT/3/0Z is appropriate for embedded transportation, diagnostic, and test equipment that must communicate with CAN-based subsystems. The device's 5 Mbps rate supports real-time command exchange and diagnostic data transfer, while the 8-pin SOIC package simplifies assembly in compact control hardware. The VIO interface allows operation with lower-voltage controller I/O, reducing the number of level-shifting stages in the design. In diagnostic equipment, the bus cable may be long and exposed to external interference, so designers should follow the NXP recommendation for common-mode components, use proper 120-ohm termination at the physical endpoints, and verify signal integrity with realistic harness loading.
Recomendado
Low-Power CAN Sensor Network
The TJA1042AT/3/0Z can serve as the physical-layer device in a low-power CAN sensor network when the host controller supports bus wake-up. Standby mode reduces power consumption during idle intervals, while passive behavior when unpowered helps prevent the transceiver from obstructing communication among other active nodes. The 5 Mbps capability is more than adequate for many distributed sensor installations with short cable runs and infrequent updates. The VIO pin supports 3.3 V host logic, reducing system-level power and level-conversion requirements. For battery-powered nodes, calculate the standby and wake-up current budget, protect the bus pins against external surges, and ensure the chosen pull network does not add excessive loading to the differential bus.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TJA1042AT/3/0Z — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TJA1042BT/3/0Z | TJA1042BT | TCAN1042H | TCAN1044A-Q1 |
|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments | Texas Instruments |
| Product Type | High-speed CAN transceiver | High-speed CAN transceiver | High-speed CAN transceiver | High-speed CAN transceiver | High-speed CAN transceiver |
Diferenciadores clave
- Automotive-qualified NXP option with a 5 Mbps CAN interface (frente a TCAN1044A-Q1)
- Dedicated VIO pin supports controller voltage adaptation (frente a TJA1042T)
- Low-power Standby and bus wake-up behavior (frente a TCAN1042H)
Notas de diseño
Route CANH and CANL as a tightly coupled differential pair from the TJA1042AT/3/0Z to the connector or bus header. Keep the pair free of test pads, high-current switching paths, and unrelated digital clocks unless the layout engine confirms adequate spacing. Place the transceiver close to the protection network and connector to minimize radiated emissions and susceptibility. Use a continuous ground reference beneath the pair where practical, and follow the NXP TJA1042 manufacturer datasheet for the recommended common-mode component placement.
Do not treat every TJA1042 suffix as electrically interchangeable at the PCB level. The TJA1042T version uses SPLIT on pin 5, while the TJA1042AT/3/0Z uses the VIO function in the /3 family. Connecting the wrong pin 5 implementation can prevent the controller-side supply from operating correctly or alter common-mode behavior. Confirm the exact ordering code, inspect the PCB net attached to pin 5, and review the NXP pin-description table before substituting a component.
Decouple VCC locally at the transceiver and connect VIO to the selected controller logic supply for the /3 configuration. Keep the supply-return path short and place bulk energy storage near the power source rather than at the transceiver pins. Validate startup, standby, bus wake-up, and unpowered behavior in the complete module because the TJA1042 can be passive when unpowered and can participate in bus activity during wake-up. Confirm controller TXD and RXD levels against the VIO voltage used in the design.
Información de cumplimiento
The Full Electronic product listing identifies the device as ROHS3 compliant, and the Arrow listing identifies it as an automotive AEC-Q100 8-pin SOIC transceiver.