TJA1041
High speed CAN transceiver
Rev. 06 — 5 December 2007
Product data sheet
1. General description
The TJA1041 provides an advanced interface between the protocol controller and the
physical bus in a Controller Area Network (CAN) node. The TJA1041 is primarily intended
for automotive high-speed CAN applications (up to 1 Mbit/s). The transceiver provides
differential transmit capability to the bus and differential receive capability to the CAN
controller. The TJA1041 is fully compatible to the ISO 11898 standard, and offers
excellent ElectroMagnetic Compatibility (EMC) performance, very low power
consumption, and passive behavior when supply voltage is off. The advanced features
include:
•
Low-power management, supporting local and remote wake-up with wake-up source
recognition and the capability to control the power supply in the rest of the node
•
Several protection and diagnosis functions including short circuits of the bus lines and
first battery connection
•
Automatic adaptation of the I/O-levels, in line with the supply voltage of the controller
2. Features
2.1 Optimized for in-vehicle high speed communication
I
I
I
I
I
I
I
I
I
Fully compatible with the ISO 11898 standard
Communication speed up to 1 Mbit/s
Very low ElectroMagnetic Emission (EME)
Differential receiver with wide common-mode range, offering high ElectroMagnetic
Immunity (EMI)
Passive behavior when supply voltage is off
Automatic I/O-level adaptation to the host controller supply voltage
Recessive bus DC voltage stabilization for further improvement of EME behavior
Listen-only mode for node diagnosis and failure containment
Allows implementation of large networks (more than 110 nodes)
2.2 Low-power management
I
Very low-current in Standby and Sleep mode, with local and remote wake-up
I
Capability to power-down the entire node, still allowing local and remote wake-up
I
Wake-up source recognition
NXP Semiconductors
TJA1041
High speed CAN transceiver
2.3 Protection and diagnosis (detection and signalling)
I
I
I
I
I
I
I
I
I
I
TXD dominant clamping handler with diagnosis
RXD recessive clamping handler with diagnosis
TXD-to-RXD short-circuit handler with diagnosis
Overtemperature protection with diagnosis
Undervoltage detection on pins V
CC
, V
I/O
and V
BAT
Automotive environment transient protected bus pins and pin V
BAT
Short-circuit proof bus pins and pin SPLIT (to battery and to ground)
Bus line short-circuit diagnosis
Bus dominant clamping diagnosis
Cold start diagnosis (first battery connection)
3. Quick reference data
Table 1.
Symbol
V
CC
V
I/O
V
BAT
I
BAT
V
CANH
V
CANL
V
SPLIT
V
esd
Quick reference data
Parameter
DC voltage on pin V
CC
DC voltage on pin V
I/O
DC voltage on pin V
BAT
V
BAT
input current
DC voltage on pin CANH
DC voltage on pin CANL
DC voltage on pin SPLIT
electrostatic discharge voltage
Conditions
operating range
operating range
operating range
V
BAT
= 12 V
0 V < V
CC
< 5.25 V; no time limit
0 V < V
CC
< 5.25 V; no time limit
0 V < V
CC
< 5.25 V; no time limit
Human Body Model (HBM)
pins CANH, CANL and SPLIT
pins TXD, RXD, V
I/O
and STB
all other pins
t
PD(TXD-RXD)
propagation delay TXD to RXD
T
vj
[1]
[1]
Min
4.75
2.8
5
10
−27
−27
−27
−6
−3
−4
40
−40
Typ
-
-
-
-
-
-
-
-
-
-
-
-
Max
5.25
5.25
27
30
+40
+40
+40
+6
+3
+4
255
+150
Unit
V
V
V
µA
V
V
V
kV
kV
kV
ns
°C
V
STB
= 0 V
virtual junction temperature
Equivalent to discharging a 100 pF capacitor via a 1.5 kΩ series resistor (6 kV level with pin GND connected to ground).
4. Ordering information
Table 2.
Ordering information
Package
Name
TJA1041T
TJA1041U
SO14
-
Description
plastic small outline package; 14 leads; body width 3.9 mm
bare die; 1930
×
3200
×
380
µm
Version
SOT108-1
-
Type number
TJA1041_6
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 06 — 5 December 2007
2 of 26
NXP Semiconductors
TJA1041
High speed CAN transceiver
5. Block diagram
VI/O
5
V
CC
3
V
BAT
10
7
TIME-OUT
LEVEL
ADAPTOR
TEMPERATURE
PROTECTION
TJA1041
TXD
1
INH
EN
6
13
STB
14
V
BAT
DRIVER
12
CANH
CANL
WAKE
9
WAKE
COMPARATOR
MODE
CONTROL
+
FAILURE
DETECTOR
+
WAKE-UP
DETECTOR
RXD
RECESSIVE
DETECTION
V
CC
SPLIT
11
SPLIT
V
I/O
ERR
8
V
BAT
V
I/O
LOW POWER
RECEIVER
V
CC
RXD
4
NORMAL
RECEIVER
2
mgu166
GND
Fig 1. Block diagram
TJA1041_6
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 06 — 5 December 2007
3 of 26
NXP Semiconductors
TJA1041
High speed CAN transceiver
6. Pinning information
6.1 Pinning
TXD
GND
V
CC
RXD
V
I/O
EN
INH
1
2
3
4
5
6
7
001aag909
14 STB
13 CANH
12 CANL
TJA1041T
11 SPLIT
10 V
BAT
9
8
WAKE
ERR
Fig 2. Pin configuration
6.2 Pin description
Table 3.
Symbol
TXD
GND
V
CC
RXD
V
I/O
EN
INH
ERR
WAKE
V
BAT
SPLIT
CANL
CANH
STB
Pin description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Description
transmit data input
ground
transceiver supply voltage input
receive data output; reads out data from the bus lines
I/O-level adapter voltage input
enable control input
inhibit output for switching external voltage regulators
error and power-on indication output (active LOW)
local wake-up input
battery voltage input
common-mode stabilization output
LOW-level CAN bus line
HIGH-level CAN bus line
standby control input (active LOW)
TJA1041_6
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 06 — 5 December 2007
4 of 26
NXP Semiconductors
TJA1041
High speed CAN transceiver
7. Functional description
The primary function of a CAN transceiver is to provide the CAN physical layer as
described in the ISO 11898 standard. In the TJA1041 this primary function is
complemented with a number of operating modes, fail-safe features and diagnosis
features, which offer enhanced system reliability and advanced power management
functionality.
7.1 Operating modes
The TJA1041 can be operated in five modes, each with specific features. Control pins
STB and EN select the operating mode. Changing between modes also gives access to a
number of diagnostics flags, available via pin ERR. The following sections describe the
five operating modes.
Table 4
shows the conditions for selecting these modes.
Figure 3
illustrates the mode transitions when V
CC
, V
I/O
and V
BAT
are present.
Table 4.
STB
X
EN
X
Operating mode selection
[1]
Internal flags
UV
NOM
set
cleared
UV
BAT
X
set
pwon;
wake-up
X
[2]
one or both set
both cleared
Sleep mode
[3]
Standby mode
no change from Sleep mode
Standby mode from any
other mode
L
L
cleared
cleared
one or both set
both cleared
Standby mode
no change from Sleep mode
Standby mode from any
other mode
L
H
cleared
cleared
one or both set
both cleared
Standby mode
no change from Sleep mode
go-to-sleep command mode
from any other mode
[4]
H
H
[1]
[2]
[3]
[4]
[5]
Control pins
Operating mode
Pin INH
floating
H
floating
H
H
floating
H
H
floating
H
[4]
H
H
L
H
cleared
cleared
cleared
cleared
X
X
pwon/listen-only mode
normal mode
[5]
X = don’t care.
Setting the pwon flag or the wake-up flag will clear the UV
NOM
flag.
The transceiver directly enters Sleep mode and pin INH is set floating when the UV
NOM
flag is set (so after
the undervoltage detection time on either V
CC
or V
I/O
has elapsed before that voltage level has recovered).
When go-to-sleep command mode is selected for longer than the minimum hold time of the go-to-sleep
command, the transceiver will enter Sleep mode and pin INH is set floating.
On entering normal mode the pwon flag and the wake-up flag will be cleared.
TJA1041_6
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 06 — 5 December 2007
5 of 26
Embedded System
京公网安备 11010802033920号
EEWORLD
