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
