TJA1055T/3/1J
TJA1055T/3/1J - 125 kBd Fault-Tolerant CAN Transceiver | NXP
NXP Semiconductors TJA1055T/3/1J is an enhanced fault-tolerant Controller Area Network transceiver with differential transmit and receive capability, optimized for low-speed CAN communication up to 125 kBd. The device operates from a 5 V to 28 V supply range, includes a 3 V VIO variant for interfacing with low-voltage CAN controllers, and is offered in a 14-pin SO surface-mount tape-and-reel package. It is designed for passenger-car body and comfort electronics where fault tolerance and low-speed in-vehicle networking are important.
A CAN transceiver is the physical-layer interface between a CAN protocol controller and the differential CAN bus. It converts controller logic signals into CANH and CANL bus activity and converts differential bus voltage into a receive signal. Positioned within the hierarchy of CAN interface ICs, transceiver ICs, interface ICs, and semiconductors, the TJA1055T provides the electrical interface required to connect digital controllers to a robust in-vehicle communication network.
The TJA1055T/3/1J provides operation at data rates up to 125 kBd, differential receive and transmit functions, and sleep or standby operating modes for reduced power consumption. Its supply-voltage coverage supports systems operating from 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, and 28 V environments. The /3 order-code variant provides a 3 V VIO interface, allowing compatibility with controllers or logic domains using a lower supply voltage.
The device uses differential bus signaling to provide common-mode rejection and improve robustness against noise found in vehicle electrical environments. Its fault-tolerant design is intended for low-speed CAN networks in passenger cars rather than high-bandwidth automotive Ethernet or high-speed CAN FD systems. The 14-pin SO package supports compact surface-mount assembly while exposing the controller interface, bus interface, power, ground, and control connections required by the device architecture.
Typical applications include vehicle body-control modules, door and seat controllers, climate-control interfaces, lighting controllers, comfort systems, and distributed low-speed passenger-car networks. The combination of a 125 kBd maximum data rate, broad supply range, sleep or standby support, and 3 V VIO option makes the TJA1055T/3/1J appropriate where a 3.3 V controller must communicate with a conventional 12 V or 24 V vehicle CAN network.
When designing the PCB layout, treat CANH and CANL as a controlled-impedance differential pair routed as symmetrically as practical, with a continuous return path beneath the pair. Keep the transceiver close to the bus connector or bus-header, minimize stub branches, and follow the grounding and decoupling recommendations in the manufacturer datasheet. Component values and layout distances not present in the supplied source extract remain unverified and must be confirmed from the complete NXP datasheet before release.
This page consolidates the verified NXP product information, distributor listings, order-code distinctions, and package data for TJA1055T/3/1J. It also distinguishes confirmed drop-in references from unsupported cross-brand equivalents, highlights verified design parameters, and clearly identifies pricing, pin-mapping, and detailed electrical values that still require confirmation.
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