TJA1043TKY
TJA1043TKY - 5 Mbps CAN Transceiver | NXP | Automotive
NXP Semiconductors TJA1043TKY is a high-speed CAN transceiver for automotive networking, providing one CANbus transceiver with differential transmit and receive capability for a protocol controller. The verified distributor data identifies a maximum data rate of 5 Mbps, a 5 V supply, normal, sleep, and standby operating modes, AEC-Q100 qualification, and a 14-pin HVSON package measuring 3 x 4.5 mm. It interfaces a Controller Area Network protocol controller with the physical two-wire CAN bus.
A Controller Area Network transceiver is a physical-layer interface within the CAN network hierarchy. A CAN protocol controller generates and interprets framed messages, while the transceiver converts those digital controller signals into differential bus levels and converts received bus levels back into controller-compatible signals. This division keeps protocol handling and physical-layer signaling separate, allowing a microcontroller-based CAN controller to communicate over a differential, fault-tolerant vehicle network.
The TJA1043TKY supports high-speed CAN communication up to 5 Mbps and includes standby and sleep modes for reduced power use when communication is not continuously required. Normal mode supports active bus communication, while the low-power modes help manage operating current in parked or partially active vehicle systems. The part is identified by distributor listings as automotive-grade and AEC-Q100 qualified. Its small HVSON package supports compact electronic control-unit layouts, although exposed-pad layout and thermal management must follow the NXP datasheet.
The transceiver provides the required interface between a CAN protocol controller and the physical two-wire CAN bus. Differential signaling improves common-mode rejection on vehicle networks, while the transceiver handles the electrical relationship between controller-side TXD and RXD signals and bus-side CANH and CANL conductors. Because these signals interact with wiring, termination, protection, and electromagnetic compatibility requirements, PCB layout and cable routing remain as important as controller firmware.
Typical uses include automotive body-control modules, powertrain controllers, gateway units, comfort systems, engine controllers, and industrial CAN equipment connected to vehicle-grade electronics. The verified data specifically associates the device with 5 Mbps CAN, 5 V operation, low-power sleep and standby states, and automotive qualification. It is suitable when an existing design uses the 14-HVSON footprint and its exact pin functions and exposed-pad requirements.
A critical design step is to reproduce the manufacturer-recommended package land pattern, pin assignments, CAN bus routing, termination, and decoupling exactly from the datasheet. Do not infer exposed-pad connections or bus-component values from the distributor summaries. Before release, validate timing, bus loading, fault behavior, sleep current, EMC performance, and wake behavior across temperature and supply tolerances using the complete manufacturer documentation.
This page combines verified distributor specifications, official NXP documentation, application guidance, and drop-in-replacement constraints. It also identifies where detailed pin-level, electrical-limit, lifecycle, price, and certification information requires direct verification from the manufacturer datasheet or current distributor quotation.
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