Fault-tolerant CAN transceiver | NXP Semiconductors

Overview

Archived content is no longer updated and is made available for historical reference only. The TJA1055 is NXP’s recommended part for Fault-tolerant CAN Transceivers.

The TJA1054 is the interface between the protocol controller and the physical bus wires in a Controller Area Network (CAN). It is primarily intended for low-speed applications up to 125 kBd in passenger cars. The device provides differential receive and transmit capability but will switch to single-wire transmitter and/or receiver in error conditions.

The TJA1054T is pin and downwards compatible with the PCA82C252T and the TJA1053T. This means that these two devices can be replaced by the TJA1054T with retention of all functions.

The important improvements of the TJA1054 with respect to the PCA82C252 and TJA1053 are:

Very low EME due to a very good matching of the CANL and CANH output signals
Good EMI, especially in low power modes
Full wake-up capability during bus failures
Extended bus failure management including short-circuit of the CANH bus line to V_CC
Support for easy system fault diagnosis
Two-edge sensitive wake-up input signal via pin WAKE

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Features

Optimized for in-car low-speed communication

Baud rate up to 125 kBd
Up to 32 nodes can be connected
Supports unshielded bus wires
Very low ElectroMagnetic Emission (EME) due to built-in slope control function and a very good matching of the CANL and CANH bus outputs
Very high ElectroMagnetic Immunity (EMI) in normal and low power operating modes
Fully integrated receiver filters
Transmit Data (TxD) dominant time-out function

Bus failure management

Supports single-wire transmission modes with ground offset voltages up to 1.5 V
Automatic switching to single-wire mode in the event of bus failures, even when the CANH bus wire is short-circuited to V_CC
Automatic reset to differential mode if bus failure is removed
Full wake-up capability during failure modes

Protections

Bus pins short-circuit safe to battery and to ground
Thermally protected
Bus lines protected against transients in an automotive environment
An unpowered node does not disturb the bus lines

Support for low power modes

Low current sleep mode and standby mode with wake-up via the bus lines
Power-on reset flag on the output

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Features

Optimized for in-car low-speed communication

Baud rate up to 125 kBd
Up to 32 nodes can be connected
Supports unshielded bus wires
Very low ElectroMagnetic Emission (EME) due to built-in slope control function and a very good matching of the CANL and CANH bus outputs
Very high ElectroMagnetic Immunity (EMI) in normal and low power operating modes
Fully integrated receiver filters
Transmit Data (TxD) dominant time-out function

Bus failure management

Supports single-wire transmission modes with ground offset voltages up to 1.5 V
Automatic switching to single-wire mode in the event of bus failures, even when the CANH bus wire is short-circuited to V_CC
Automatic reset to differential mode if bus failure is removed
Full wake-up capability during failure modes

Protections