TJA1055 Datasheet PDF

●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

●MoreLess

●## 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