TJA1041A
High-speed CAN transceiver
Rev. 04 — 29 July 2008
Product data sheet
1. General description
The TJA1041A provides an advanced interface between the protocol controller and the
physical bus in a Controller Area Network (CAN) node. The TJA1041A 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 TJA1041A 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
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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
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Capability to power down the entire node, still allowing local and remote wake-up
I
Wake-up source recognition
2.3 Protection and diagnosis (detection and signalling)
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TXD dominant clamping handler with diagnosis
NXP Semiconductors
TJA1041A
High-speed CAN transceiver
I
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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
I
BAT
Quick reference data
Parameter
DC voltage on
pin V
CC
DC voltage on
pin V
I/O
V
BAT
input current
Conditions
operating range
operating range
normal or pwon/listen-only mode
standby mode;
V
CC
> 4.75 V; V
I/O
= 2.8 V;
V
INH
= V
WAKE
= V
BAT
= 12 V
sleep mode;
V
INH
= V
CC
= V
I/O
= 0 V;
V
WAKE
= V
BAT
= 12 V
V
CANH
V
CANL
V
SPLIT
V
esd
DC voltage on pin
CANH
DC voltage on pin
CANL
DC voltage on pin
SPLIT
electrostatic
discharge voltage
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
Typ
Max
5.25
5.25
40
30
Unit
V
V
µA
µA
4.75 -
2.8
15
10
-
30
20
10
20
30
µA
−27
−27
−27
-
-
-
+40
+40
+40
V
V
V
−6
−3
−4
40
−40
-
-
-
-
-
+6
+3
+4
255
kV
kV
kV
ns
V
STB
= 0 V
virtual junction
temperature
+150
°C
Equivalent to discharging a 100 pF capacitor via a 1.5 kΩ series resistor (6 kV level with pin GND
connected to ground).
TJA1041A_4
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 29 July 2008
2 of 25
NXP Semiconductors
TJA1041A
High-speed CAN transceiver
4. Ordering information
Table 2.
Ordering information
Package
Name
TJA1041AT
TJA1041AU
SO14
-
Description
plastic small outline package; 14 leads; body width 3.9 mm
bare die; 1920
×
3190
×
380
µm
Version
SOT108-1
-
Type number
5. Block diagram
V
I/O
5
V
CC
3
V
BAT
10
7
TIME-OUT
LEVEL
ADAPTOR
TEMPERATURE
PROTECTION
TJA1041A
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
mnb115
GND
Fig 1.
Block diagram
TJA1041A_4
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 29 July 2008
3 of 25
NXP Semiconductors
TJA1041A
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
001aag910
14 STB
13 CANH
12 CANL
TJA1041A
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)
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 TJA1041A 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.
TJA1041A_4
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 29 July 2008
4 of 25
NXP Semiconductors
TJA1041A
High-speed CAN transceiver
7.1 Operating modes
The TJA1041A 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
Internal flags
UV
NOM
set
cleared
UV
BAT
X
set
pwon;
wake-up
X
[1]
one or both set
both cleared
Sleep mode
[2]
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
[3]
H
H
[1]
[2]
[3]
[4]
Control pins
Operating mode
Pin INH
floating
H
floating
H
H
floating
H
H
floating
H
[3]
H
H
L
H
cleared
cleared
cleared
cleared
X
X
Pwon/Listen-only mode
Normal mode
[4]
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.
TJA1041A_4
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 29 July 2008
5 of 25
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