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부품번호 TJA1054A 기능
기능 Fault-tolerant CAN transceiver
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TJA1054A 데이터시트, 핀배열, 회로
TJA1054A
Fault-tolerant CAN transceiver
Rev. 05 — 29 September 2009
www.DataSheet4U.com
Product data sheet
1. General description
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 kBd 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 ElectroStatic Discharge (ESD) improved version of the TJA1054.
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 ElectroMagnetic Emission (EME) due to a very good matching of the CANL
and CANH output signals
Good ElectroMagnetic Emission (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 VCC
Support for easy system fault diagnosis
Two-edge sensitive wake-up input signal via pin WAKE
2. Features
2.1 Optimized for in-car low-speed communication
I Baud rate up to 125 kBd
I Up to 32 nodes can be connected
I Supports unshielded bus wires
I Very low ElectroMagnetic Emission (EME) due to built-in slope control function and a
very good matching of the CANL and CANH bus outputs
I Good ElectroMagnetic Immunity (EMI) in normal operating mode and in low power
modes
I Fully integrated receiver filters
I Transmit Data (TxD) dominant time-out function
2.2 Bus failure management
I Supports single-wire transmission modes with ground offset voltages up to 1.5 V




TJA1054A pdf, 반도체, 판매, 대치품
NXP Semiconductors
6. Pinning information
6.1 Pinning
TJA1054A
www.DataSheet4U.com
Fault-tolerant CAN transceiver
Fig 2. Pin configuration
INH 1
TXD 2
RXD 3
ERR 4
STB 5
EN 6
WAKE 7
14 BAT
13 GND
12 CANL
TJA1054AT 11 CANH
10 VCC
9 RTL
8 RTH
001aaf609
6.2 Pin description
Table 3.
Symbol
INH
TXD
RXD
ERR
STB
EN
WAKE
RTH
RTL
VCC
CANH
CANL
GND
BAT
Pin description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Description
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 a bus failure is detected; active LOW
in standby and sleep mode when a wake-up is detected; active
LOW in power-on standby when a VBAT power-on event is detected
standby digital control signal input; together with the input signal
on pin EN this input determines the state of the transceiver;
see Table 5 and Figure 3
enable digital control signal input; together with the input signal on
pin STB this input determines the state of the transceiver;
see Table 5 and Figure 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 error
the line is terminated with a predefined impedance
supply voltage
HIGH-level CAN bus line
LOW-level CAN bus line
ground
battery supply voltage
TJA1054A_5
Product data sheet
Rev. 05 — 29 September 2009
© NXP B.V. 2009. All rights reserved.
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TJA1054A 전자부품, 판매, 대치품
NXP Semiconductors
TJA1054A
www.DataSheet4U.com
Fault-tolerant CAN transceiver
7.2 Low power modes
The transceiver provides three low power modes which can be entered and exited via
STB and EN (see Table 5 and Figure 3).
The sleep mode is the mode with the lowest power consumption. Pin INH is switched to
HIGH-impedance for deactivation of the external voltage regulator. Pin CANL is biased to
the battery voltage via pin RTL. If the supply voltage is provided, pins RXD and ERR will
signal the wake-up interrupt.
The standby mode operates in the same way as the sleep mode but with a HIGH level on
pin INH.
The power-on standby mode is the same as the standby mode, however, in this mode the
battery power-on flag is shown on pin ERR instead of the wake-up interrupt signal. The
output on pin RXD will show the wake-up interrupt. This mode is only for reading out the
power-on flag.
Table 5.
Mode
Normal operating and low power modes
Pin STB Pin EN Pin ERR
LOW
HIGH
Goto-sleep LOW
command
Sleep
LOW
Standby LOW
Power-on HIGH
standby
HIGH
LOW[4]
LOW
LOW
wake-up
interrupt
signal
[1][2][3]
VBAT
power-on
flag[1][5]
Normal
HIGH
operating
HIGH
error flag no error
flag
Pin RXD
LOW
HIGH
wake-up
interrupt
signal
[1][2][3]
Pin RTL
switched
to
VBAT
wake-up
interrupt
signal
[1][2][3]
dominant
received
data
recessive
received
data
VBAT
VCC
[1] If the supply voltage VCC is present.
[2] Wake-up interrupts are released when entering normal operating mode.
[3] A local or remote wake-up event will be signalled at the transceiver pins RXD and ERR if
VBAT = 5.3 V to 27 V.
[4] In case the goto-sleep command was used before. When VCC drops, pin EN will become LOW, but due to
the fail-safe functionality this does not effect the internal functions.
[5] VBAT power-on flag will be reset when entering normal operating mode.
Wake-up requests are recognized by the transceiver through two possible channels:
The bus lines for remote wake-up
Pin WAKE for local wake-up
In order to wake-up the transceiver remotely through the bus lines, a filter mechanism is
integrated. This mechanism makes sure that noise and any present bus failure conditions
do not result into an erroneous wake-up. Because of this mechanism it is not sufficient to
simply pull the CANH or CANL bus lines to a dominant level for a certain time. To
guarantee a successful remote wake-up under all conditions, a message frame with a
dominant phase of at least the maximum specified t(CANH) or t(CANL) in it is required.
TJA1054A_5
Product data sheet
Rev. 05 — 29 September 2009
© NXP B.V. 2009. All rights reserved.
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부품번호상세설명 및 기능제조사
TJA1054

Fault-tolerant CAN transceiver

NXP Semiconductors
NXP Semiconductors
TJA1054A

Fault-tolerant CAN transceiver

NXP Semiconductors
NXP Semiconductors

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