TJA1055T/3,518

IC CAN TXRX FAULT-TOL 14-SOIC

Overview

The TJA1055 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 TJA1055 is the enhanced version of the TJA1054 and TJA1054A. TJA1055 has the same functionality but in addition offering a number of improvements. The most important improvements of the TJA1055 with respect to the TJA1054 and TJA1054A are:

* Improved ElectroStatic Discharge ESD performance

* Lower current consumption in sleep mode

* Wake-up signalling on RXD and ERR without VCC active

* 3 V interfacing with microcontroller possible with TJA1055T/3

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## Features

**Optimized for in-car low-speed communication**

* Pin-to-pin compatible with TJA1054 and TJA1054A

* 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 operating mode and in low power modes

* Fully integrated receiver filters

* Transmit Data TxD dominant time-out function

* High ESD robustness:

* +-8 kV Electrostatic Discharge ESD protection Human Body Model HBM for off-board pins

* +-6 kV Electrostatic Discharge ESD protection IEC 61000-4-2 for off-board pins

* Low-voltage microcontroller support

**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 VCC

* 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

* Microcontroller interface without reverse current paths, if unpowered

**Support for low power modes**

* Low current sleep mode and standby mode with wake-up via the bus lines

* Software accessible power-on reset flag

## Features