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부품번호 TJA1083 기능
기능 FlexRay node transceiver
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TJA1083 데이터시트, 핀배열, 회로
TJA1083
FlexRay node transceiver
Rev. 1 — 10 October 2012
Product data sheet
1. General description
The TJA1083 FlexRay node transceiver is compliant with the FlexRay Electrical Physical
Layer specification V3.0.1 (see Ref. 1). In order to meet JASPAR the equirements, it
implements the ‘Increased voltage amplitude transmitter’ functional class. It is primarily
intended for communication systems operating at between 2.5 Mbit/s and 10 Mbit/s, and
provides an advanced interface between the protocol controller and the physical bus in a
FlexRay network. The TJA1083 offers an optimized solution for Electronic Control Unit
(ECU) applications that do not need enhanced power management and are typically
switched by the ignition or activated by a dedicated wake-up line.
The TJA1083 provides a differential transmit capability to the network and a differential
receive capability to the FlexRay controller. It offers excellent ElectroMagnetic
Compatibility (EMC) performance as well as high ElectroStatic Discharge (ESD)
protection.
The TJA1083 actively monitors system performance using dedicated error and status
information (readable by any microcontroller), as well as internal voltage and temperature
monitoring.
2. Features and benefits
http://www.DataSheet4U.net/
2.1 Optimized for time triggered communication systems
Compliant with Electrical Physical Layer specification V3.0.1
Meets JASPAR requirementsasdescribedinthe ‘Busdriverincreasedvoltage
amplitudetransmitterfunctionalclass
Automotive product qualification in accordance with AEC-Q100
Data transfer rates from 2.5 Mbit/s to 10 Mbit/s
Supports 60 ns minimum bit time at 400 mV differential input voltage
Very low ElectroMagnetic Emission (EME) to support unshielded cable
Differential receiver with high common-mode range for excellent ElectroMagnetic
Immunity (EMI)
Auto I/O level adaptation to host controller supply voltage VIO
Can be used in 14 V, 24 V and 48 V powered systems
Instant transmitter shut-down interface (BGE pin)
2.2 Low-power management
Very low current consumption in Standby mode
Remote wake-up via a wake-up pattern or dedicated FlexRay data frames on the bus
lines
datasheet pdf - http://www.DataSheet4U.net/




TJA1083 pdf, 반도체, 판매, 대치품
NXP Semiconductors
5. Pinning information
5.1 Pinning
TJA1083
FlexRay node transceiver
VIO 1
TXD 2
TXEN 3
RXD 4
BGE 5
STBN 6
SCLK 7
Fig 2. Pin configuration
TJA1083TT
14 VCC
13 BP
12 BM
11 GND
10 ERRN
9 SCSN
8 SDO
015aaa134
5.2 Pin description
Table 2. Pin description
Symbol Pin
Type Description
VIO 1 P supply voltage for VIO voltage level adaptation
TXD 2
I
transmit data input; internal pull-down
TXEN 3
RXD 4
I transmitter enable input; when HIGH transmitter disabled; internal
pull-up
http://www.DataSheet4U.net/
O receive data output
BGE 5
I
bus guardian enable input; when LOW transmitter disabled; internal
pull-down
STBN 6
I
mode control input; transceiver in Normal mode when HIGH;
internal pull-down
SCLK 7
I
SPI clock signal; internal pull-up
SDO 8
O SPI data output
SCSN 9
I
SPI chip select input; internal pull-up/pull-down
ERRN 10
O
error diagnosis output and wake-up indication
GND 11
P
ground
BM 12
I/O bus line minus
BP 13
I/O bus line plus
VCC 14
P
supply voltage (+5 V)
6. Functional description
6.1 Power modes
The TJA1083 features three power modes: Normal, Standby and Power-off. Normal and
Standby modes can be selected via the STBN input (HIGH for Normal mode) once the
transceiver has been powered up. See Table 3 for a detailed description of pin signaling in
the three power modes.
TJA1083
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 10 October 2012
© NXP B.V. 2012. All rights reserved.
4 of 41
datasheet pdf - http://www.DataSheet4U.net/

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TJA1083 전자부품, 판매, 대치품
NXP Semiconductors
TJA1083
FlexRay node transceiver
6.1.1.1 Bus activity and idle detection
In Normal mode, bus activity and bus idle are detected as follows:
Bus activity is detected when the absolute differential voltage on the bus lines is
higher than Vi(dif)det(act)for tdet(act)(bus):
If the differential voltage on the bus lines is lower than VIL(dif) after bus activity has
been detected, pin RXD switches LOW.
If the differential voltage on the bus lines is higher than VIH(dif) after bus activity has
been detected, pin RXD remains HIGH.
Bus idle is detected when the absolute differential voltage on the bus lines is lower
than Vi(dif)det(act)for tdet(idle)(bus). This results in pin RXD being switched HIGH or
staying HIGH.
6.1.2 Standby mode
Standby mode is a low-power mode featuring very low current consumption. In Standby
mode, the transceiver is unable to transmit or receive data since both the transmitter and
the normal receiver are switched off. The low-power receiver is activated to monitor the
bus for wake-up activity, provided an undervoltage has not been detected on pin VCC.
The low-power receiver is deactivated if an undervoltage is detected on pin VCC - with the
result that the wake flag is not set if a wake-up pattern or dedicated data frame is
received.
Pins ERRN and RXD indicate the status of the wake flag when VIO and VCC are within
their operating ranges. See Table 3 forhttp://www.DataSheet4U.net/ a description of pins ERRN and RXD when an
undervoltage is detected on pin VIO or pin VCC.
The status register cannot be read via the SPI interface if an undervoltage is detected on
pin VIO.
The BGE input has no effect in Standby mode.
6.1.3 Power-off mode
The transmitter and the two receivers (normal and low-power) are deactivated in
Power-off mode. As a result, the wake flag is not set if a wake-up pattern or dedicated
data frame is received. If the voltage at VCC rises above Vth(rec)POR, the transceiver
switches to Standby mode and the digital section is reset. If VCC subsequently drops
below Vth(det)POR, the transceiver reverts to Power-off mode (see Section 6.2).
The status register cannot be read via the SPI interface in Power-off mode.
6.1.4 State transitions
Figure 4 shows the TJA1083 state transition diagram. The timing diagram for the ERRN
indication signal during transitions between Normal and Standby modes, when the error
flag is set and the wake flag is not set, is illustrated in Figure 5 and described in Table 6.
TJA1083
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 10 October 2012
© NXP B.V. 2012. All rights reserved.
7 of 41
datasheet pdf - http://www.DataSheet4U.net/

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