TJA1049T/3J
TJA1049T/3J - 3-5V High-Speed CAN Transceiver | NXP
The NXP TJA1049T/3J is a high-speed CAN transceiver with integrated standby mode for connecting a CAN protocol controller to a physical two-wire CAN bus. It supports direct interfacing with microcontrollers operating from 3 V to 5 V and implements CAN physical-layer requirements identified by NXP with ISO 11898-2:2003, ISO 11898-5:2007, and the pending updated ISO 11898-2:2016 version. The device is supplied in an 8-pin SOIC package.
A CAN transceiver is an interface IC that bridges a host controller and a differential communication bus. The CAN controller generates and interprets CAN frames, while the transceiver converts those digital signals into robust differential bus levels and converts received bus levels back into logic-compatible signals. In the hierarchy of electronic components, the TJA1049T/3J belongs to the CAN interface and physical-layer transceiver class, within interface ICs and networking semiconductors.
The principal verified features include a 3 V to 5 V microcontroller-interface range, high-speed CAN operation, differential transmit and receive capability, standby support, and compatibility with the CAN physical layer standards listed by NXP. Its standby function is intended for systems that need low-current operation while retaining bus wake-up capability. The physical two-wire interface supports integration into automotive and industrial CAN networks while leaving arbitration, framing, error management, and message scheduling to the CAN controller.
Technical use requires a CAN controller with TXD and RXD signal connections, a suitable transceiver supply, CAN bus termination, common-mode support, and correctly configured logic levels. The standby pin and mode timing should be reviewed against the system power-management strategy because entering or leaving standby can affect node availability. Because the verified excerpt does not provide a complete timing table, absolute transceiver delay, loop-delay, propagation-delay, receiver threshold, bus-fault, and current-limit values are left as data-needed fields rather than inferred.
Typical applications include automotive body and powertrain electronics, industrial automation equipment, transport systems, embedded gateways, motor controllers, sensor networks, and CAN-based diagnostic equipment. The 8-pin SOIC package is useful when a through-hole-compatible surface-mount assembly process and a compact two-wire bus interface are required.
For robust PCB implementation, place the transceiver close to the connector and CAN bus routing, provide solid ground-plane continuity, route CANH and CANL as a tight differential pair, and place termination only at the physical ends of the bus. Verify that the selected CAN controller, supply voltage, transceiver mode pins, and termination strategy match the complete manufacturer datasheet before production release.
This page consolidates verified NXP product information, distributor references, package details, interface standards, application context, and design guidance. Missing electrical timing, current, environmental, and absolute maximum values are explicitly marked where the supplied verified data does not support a trustworthy value.
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