Philips Semiconductors
Preliminary specification
Fault-tolerant CAN transceiver
TJA1054
FEATURES
GENERAL DESCRIPTION
The TJA1054 is the interface between the protocol
controller and the physical wires of the bus lines in a
Control Area Network (CAN). It is primarily intended for
low-speed applications, up to 125 kBaud, in passenger
cars. The device provides differential transmit capability
but will switch in error conditions to single-wire transmitter
and/or receiver.
Optimized for in-car low-speed communication
• Baud rate up to 125 kBaud
• Up to 32 nodes can be connected
• Supports unshielded bus wires
• Very low Radio Frequency Interference (RFI) due to
built-in slope control function and a very good matching
of the CANL and CANH bus outputs
The TJA1054T is pin and upwards compatible with the
PCA82C252T and the TJA1053T. This means that these
two devices can be replaced by the TJA1054T with
retention of all functions.
• Fully integrated receiver filters
• Permanent dominant monitoring of transmit data input
• Good immunity performance of ElectroMagnetic
Compatibility (EMC) in normal operating mode and in
low power modes.
The most important improvements are:
• Very low RFI due to a very good matching of the CANL
and CANH bus lines outputs
Bus failure management
• Good immunity performance of EMC, especially in low
power modes
• Supports single-wire transmission modes with ground
offset voltages up to 1.5 V
• Fully wake-up capability during failure modes
• Automatic switching to single-wire mode in the event of
bus failures, even when the CANH bus wire is
short-circuited to VCC
• Extended bus failure management including
short-circuit of the CANH bus line to VCC
• Supports easy fault localization
• Automatic reset to differential mode if bus failure is
removed
• Two-edge sensitive wake-up input signal via pin WAKE.
• Fully wake-up capability during failure modes.
Protection
• Short-circuit proof to battery and ground in
12 V powered systems
• 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 and standby mode with wake-up via
the bus lines
• Power-on reset flag on the output.
ORDERING INFORMATION
TYPE
PACKAGE
NUMBER
NAME
DESCRIPTION
plastic small outline package; 14 leads; body width 3.9 mm
VERSION
TJA1054T
SO14
SOT108-1
1999 Feb 11
2
NXP [ NXP ]
