Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
FEATURES
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 ElectroMagnetic Emission (EME) due to
built-in slope control function and a very good matching
of the CANL and CANH bus outputs
•
Good ElectroMagnetic Immunity (EMI) in normal
operating mode and in low power 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 and standby mode with wake-up via
the bus lines
•
Power-on reset flag on the output.
ORDERING INFORMATION
TYPE
NUMBER
TJA1054AT
TJA1054AU
PACKAGE
NAME
SO14
−
DESCRIPTION
plastic small outline package; 14 leads; body width 3.9 mm
bare die; 1990
×
2730
×
375
µm
GENERAL DESCRIPTION
TJA1054A
The TJA1054A 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 kBaud 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 TJA1054A is the ESD improved version of the
TJA1054. For an overview of the differences between the
TJA1054 and the TJA1054A, please refer to “Appendix A”.
The TJA1054AT is, as the TJA1054T, pin and downwards
compatible with the PCA82C252T and the TJA1053T. This
means that these two devices can be replaced by the
TJA1054AT or the TJA1054T with retention of all
functions.
The most important improvements of the TJA1054 and the
TJA1054A with respect to the PCA82C252 and the
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.
VERSION
SOT108-1
−
2004 Mar 23
2
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
QUICK REFERENCE DATA
SYMBOL
V
CC
V
BAT
PARAMETER
supply voltage on pin V
CC
battery voltage on pin BAT
no time limit
operating mode; note 1
load dump
I
BAT
V
CANH
V
CANL
∆V
CANH
∆V
CANL
t
PD(L)
t
r
t
f
T
vj
Note
battery current on pin BAT
CANH bus line voltage
CANL bus line voltage
CANH bus line transmitter
voltage drop
CANL bus line transmitter
voltage drop
propagation delay TXD (LOW)
to RXD (LOW)
bus line output rise time
bus line output fall time
virtual junction temperature
between 10% and 90%;
C1 = 10 nF; see Fig.5
between 10% and 90%;
C1 = 1 nF; see Fig.5
sleep mode; V
CC
= 0 V;
V
BAT
= 12 V
V
CC
= 0 to 5.0 V; V
BAT
≥
0 V;
no time limit
V
CC
= 0 to 5.0 V; V
BAT
≥
0 V;
no time limit
I
CANH
=
−40
mA
I
CANL
= 40 mA
CONDITIONS
MIN.
4.75
−0.3
5.0
−
−
−27
−27
−
−
−
−
−
−40
−
−
−
−
30
−
−
−
−
1
0.6
0.3
−
TYP.
TJA1054A
MAX.
5.25
+40
27
40
50
+40
+40
1.4
1.4
−
−
−
+150
V
V
V
V
UNIT
µA
V
V
V
V
µs
µs
µs
°C
1. A local or remote wake-up event will be signalled at the transceiver pins RXD and NERR if V
BAT
= 5.3 V to 27 V
(see Table 2).
2004 Mar 23
3
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PINNING
SYMBOL
INH
TXD
RXD
ERR
STB
EN
WAKE
RTH
RTL
V
CC
CANH
CANL
GND
BAT
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DESCRIPTION
TJA1054A
inhibit output for switching an external voltage regulator if a wake-up signal occurs
transmit data input for activating the driver to the bus lines
receive data output for reading out the data from the bus lines
error, wake-up and power-on indication output; active LOW in normal operating mode when the bus
has a failure, and in low power modes (wake-up signal or in power-on standby)
standby digital control signal input (active LOW); together with the input signal on pin EN this input
determines the state of the transceiver (in normal and low power modes); see Table 2 and Fig.3
enable digital control signal input; together with the input signal on pin STB this input determines
the state of the transceiver (in normal and low power modes); see Table 2 and Fig.3
local wake-up signal input (active LOW); both falling and rising edges are detected
termination resistor connection; in case of a CANH bus wire error the line is terminated with a
predefined impedance
termination resistor connection; in case of a CANL bus wire the line is terminated with a predefined
impedance
supply voltage
HIGH-level CAN bus line
LOW-level CAN bus line
ground
battery supply voltage
handbook, halfpage
INH
TXD
RXD
ERR
STB
EN
WAKE
1
2
3
4
5
6
7
MGU379
14 BAT
13 GND
12 CANL
TJA1054AT
11 CANH
10 VCC
9
8
RTL
RTH
Fig.2 Pin configuration.
2004 Mar 23
5
Power technology
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