TJA1145
High-speed CAN transceiver for partial networking
Rev. 4 — 09 May 2018
Product data sheet
1. General description
The TJA1145 is a high-speed CAN transceiver that provides an interface between a
Controller Area Network (CAN) protocol controller and the physical two-wire CAN bus.
The transceiver is designed for high-speed CAN applications in the automotive industry,
providing differential transmit and receive capability to (a microcontroller with) a CAN
protocol controller.
The TJA1145 features very low power consumption in Standby and Sleep modes and
supports ISO 11898-2:2016 compliant CAN Partial Networking by means of a selective
wake-up function.
A dedicated implementation of the partial networking function has been embedded into
the TJA1145/FD variants TJA1145T/FD and TJA1145TK/FD (see
Section 7.3.2
for further
details on CAN FD). This function is called ‘FD-passive’ and is the ability to ignore CAN
FD frames while waiting for a valid wake-up frame in Sleep/Standby mode. This additional
feature of partial networking is the perfect fit for networks that support both CAN FD and
standard CAN 2.0 communications. It allows normal CAN controllers that do not need to
communicate CAN FD messages to remain in partial networking Sleep/Standby mode
during CAN FD communication without generating bus errors.
Advanced power management regulates the supply throughout the node and supports
local and remote wake-up functionality. I/O levels are automatically adjusted to the I/O
levels of the controller, allowing the TJA1145 to interface directly with 3.3 V to 5 V
microcontrollers. An SPI interface is provided for transceiver control and for retrieving
status information. Bus connections are truly floating when power is off.
The TJA1145 implements the CAN physical layer as defined in ISO 11898-2:2016 and
SAE J2284-1 to SAE J2284-4. This implementation enables reliable communication in the
CAN FD fast phase at data rates up to 2 Mbit/s.
These features make the TJA1145 the ideal choice for high-speed CAN networks
containing nodes that are always connected to the battery supply line but, in order to
minimize current consumption, are only active when required by the application.
2. Features and benefits
2.1 General
ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-4 compliant
Timing guaranteed for data rates up to 2 Mbit/s
Autonomous bus biasing according to ISO 11898-2:2016
Optimized for in-vehicle high-speed CAN communication
No ‘false’ wake-ups due to CAN FD in TJA1145/FD variants
NXP Semiconductors
TJA1145
High-speed CAN transceiver for partial networking
2.2 Designed for automotive applications
8
kV ElectroStatic Discharge (ESD) protection, according to the Human Body Model
(HBM) on the CAN bus pins
6
kV ESD protection, according to IEC 61000-4-2 on pins BAT and WAKE and on the
CAN bus pins
CAN bus pins short-circuit proof to
58
V
Battery and CAN bus pins protected against transients according to ISO 7637-3, test
pulses 1, 2a, 3a and 3b.
Suitable for use in 12 V and 24 V systems
Available in SO14 and leadless HVSON14 package (3 mm
4.5 mm) with improved
Automated Optical Inspection (AOI) capability
AEC-Q100 qualified
Dark green product (halogen free and Restriction of Hazardous Substances (RoHS)
compliant)
2.3 Advanced ECU power management system
Very low-current Standby and Sleep modes, with full wake-up capability
Entire node can be powered down via the inhibit output
Remote wake-up capability via standard CAN wake-up pattern or via
ISO 11898-2:2016 compliant selective wake-up frame detection
Local wake-up via the WAKE pin
Wake-up source recognition
Bit rates of 50 kbit/s, 100 kbit/s, 125 kbit/s, 250 kbit/s, 500 kbit/s and 1 Mbit/s
supported during selective wake-up'
Local and/or remote wake-up can be disabled to reduce current consumption
Transceiver disengages from the bus when the battery supply is removed
VIO input allows for direct interfacing with 3.3 V to 5 V microcontrollers
2.4 Protection and diagnosis
16-, 24- or 32-bit SPI for configuration, control and diagnosis
Transmit Data (TXD) dominant time-out function with diagnosis
Overtemperature warning and shut-down
Undervoltage detection and recovery on pins VCC, VIO and BAT
Cold start diagnosis (via bits PO and NMS)
Advanced system and transceiver interrupt handling
TJA1145
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet
Rev. 4 — 09 May 2018
2 of 57
NXP Semiconductors
TJA1145
High-speed CAN transceiver for partial networking
3. Quick reference data
Table 1.
Symbol
V
BAT
V
CC
V
IO
Quick reference data
Parameter
battery supply voltage
supply voltage
supply voltage on pin V
IO
V
BAT
falling
Conditions
Min
4.5
4.5
2.85
2.8
4.5
V
BAT
> 4.5 V
Normal mode
Sleep mode; CAN Offline mode;
40 C
< T
vj
< 85
C;
V
BAT
= 7 V to 18 V
Standby mode; CAN Offline mode;
40 C
< T
vj
< 85
C;
V
BAT
= 7 V to 18 V
I
CC
supply current
CAN Active mode; CAN recessive; V
TXD
= V
IO
CAN Active mode; CAN dominant; V
TXD
= 0 V
Standby/Normal mode; CAN inactive;
40 C
< T
vj
< 85
C
Sleep mode; CAN inactive;
40 C
< T
vj
< 85
C
I
IO
V
ESD
V
CANH
V
CANL
T
vj
supply current on pin V
IO
electrostatic discharge voltage
voltage on pin CANH
voltage on pin CANL
virtual junction temperature
Standby/Normal mode;
40 C
< T
vj
< 85
C
Sleep mode;
40 C
< T
vj
< 85
C
IEC 61000-4-2 on pins CANH, CANL
2.7
-
-
-
-
-
-
-
-
-
6
58
58
40
Typ Max
-
-
-
-
-
-
1
40
44
3
45
4.7
3.8
7.1
5
-
-
-
-
28
5.5
5.5
3
4.75
2.85
1.5
59
68
6
65
8.5
7
11
8
+6
+58
+58
Unit
V
V
V
V
V
V
mA
A
A
mA
mA
A
A
A
A
kV
V
V
V
th(det)poff
power-off detection threshold
voltage
V
uvd(VCC)
undervoltage detection voltage
on pin VCC
V
uvd(VIO)
I
BAT
undervoltage detection voltage
on pin VIO
battery supply current
+150
C
TJA1145
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet
Rev. 4 — 09 May 2018
3 of 57
NXP Semiconductors
TJA1145
High-speed CAN transceiver for partial networking
4. Ordering information
Table 2.
Ordering information
Package
Name
TJA1145T
TJA1145T/FD
TJA1145TK
TJA1145TK/FD
SO14
SO14
HVSON14
HVSON14
Description
plastic small outline package; 14 leads; body width 3.9 mm
plastic small outline package; 14 leads; body width 3.9 mm
plastic thermal enhanced very thin small outline package; no leads;
14 terminals; body 3
4.5
0.85 mm
plastic thermal enhanced very thin small outline package; no leads;
14 terminals; body 3
4.5
0.85 mm
Version
SOT108-1
SOT108-1
SOT1086-2
SOT1086-2
Type number
5. Block diagram
(1) TJA1145T/FD and TJA1145TK/FD only.
Fig 1.
Block diagram
TJA1145
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet
Rev. 4 — 09 May 2018
4 of 57
NXP Semiconductors
TJA1145
High-speed CAN transceiver for partial networking
6. Pinning information
6.1 Pinning
Fig 2.
Pin configuration diagram: SO14
Fig 3.
Pin configuration diagram: HVSON14
Transparent top view
6.2 Pin description
Table 3.
Symbol
TXD
GND
VCC
RXD
VIO
SDO
INH
SCK
WAKE
BAT
SDI
CANL
CANH
SCSN
[1]
Pin description
Pin
1
2
[1]
3
4
5
6
7
8
9
10
11
12
13
14
Description
transmit data input
ground
5 V CAN transceiver supply voltage
receive data output; reads out data from the bus lines
supply voltage for I/O level adaptor
SPI data output
inhibit output for switching external voltage regulators
SPI clock input
local wake-up input
battery supply voltage
SPI data input
LOW-level CAN bus line
HIGH-level CAN bus line
SPI chip select input
HVSON14 package die supply ground is connected to both the GND pin and the exposed center pad. The
GND pin must be soldered to board ground. For enhanced thermal and electrical performance, it is
recommended that the exposed center pad also be soldered to board ground
TJA1145
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet
Rev. 4 — 09 May 2018
5 of 57
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