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,聚氨酯浆料
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 Section7.3.2 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
2.1General
⏹ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-4 compliant
⏹Timing guaranteed for data rates up to 2Mbit/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汽水取样
装置 High-speed CAN transceiver for partial networking
2.2Designed 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 ISO7637-3, 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)
蜡烛杯compliant)
3.Quick reference data
Table 1.Quick reference data
Symbol Parameter Conditions Min Typ Max Unit V BAT battery supply voltage 4.5-28V
微型汽油机V CC supply voltage 4.5- 5.5V
V IO supply voltage on pin V IO 2.85- 5.5V
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V BAT falling 2.8-3V V th(det)poff power-off detection thresholdvoltage
4.5- 4.75V V uvd(VCC)undervoltage detection voltage
on pin VCC
V uvd(VIO)undervoltage detection voltage
V BAT >4.5V 2.7- 2.85V on pin VIO
I BAT battery supply current Normal mode-1 1.5mA
-4059μA
Sleep mode; CAN Offline mode;
-40︒C < T vj<85︒C; V BAT = 7V to 18V
-4468μA
Standby mode; CAN Offline mode;
-40︒C < T vj<85︒C; V BAT = 7V to 18V
I CC supply current CAN Active mode; CAN recessive; V TXD=V IO-36mA
CAN Active mode; CAN dominant; V TXD=0V-4565mA
- 4.78.5μA
Standby/Normal mode; CAN inactive;
-
40︒C < T vj<85︒C
Sleep mode; CAN inactive; -40︒C < T vj<85︒C- 3.87μA I IO supply current on pin V IO Standby/Normal mode; -40︒C < T vj<85︒C-7.111μA
Sleep mode; -40︒C < T vj<85︒C-58μA V ESD electrostatic discharge voltage IEC 61000-4-2 on pins CANH, CANL-6-+6kV V CANH voltage on pin CANH-58-+58V
V CANL voltage on pin CANL-58-+58V
T vj virtual junction temperature-40-+150︒C
4.Ordering information
5.Block diagram
Table 2.
Ordering information
Type number
Package Name
Description
Version TJA1145T SO14plastic small outline package; 14leads; body width 3.9mm SOT108-1TJA1145T/FD SO14plastic small outline package; 14leads; body width 3.9mm SOT108-1TJA1145TK HVSON14plastic thermal enhanced very thin small outline package; no leads;
14terminals; body 3 ⨯ 4.5 ⨯ 0.85 mm
SOT1086-2TJA1145TK/FD
HVSON14
plastic thermal enhanced very thin small outline package; no leads; 14terminals; body 3 ⨯ 4.5 ⨯ 0.85 mm
SOT1086-2
6.Pinning information
6.1Pinning
6.2Pin description
Table 3.Pin description
Symbol Pin Description
TXD1transmit data input
GND2[1]ground
VCC3 5 V CAN transceiver supply voltage
RXD4receive data output; reads out data from the bus lines
VIO5supply voltage for I/O level adaptor
SDO6SPI data output
INH7inhibit output for switching external voltage regulators
SCK8SPI clock input
WAKE9local wake-up input
数据库探针
BAT10battery supply voltage SDI11SPI data input
CANL12LOW-level CAN bus line
CANH13HIGH-level CAN bus line
SCSN14SPI chip select input
[1]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
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