TLE8251V [INFINEON]
High Speed CAN Transceiver with Bus Wake-up;
| 型号： | TLE8251V |
| 厂家： | 
Infineon |
| 描述： | High Speed CAN Transceiver with Bus Wake-up |
| 文件： | 总35页 (文件大小：1039K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
1
Overview
Features
•
•
•
•
•
Compliant to ISO11898-2: 2003 and ISO11898-5: 2007
Wide common mode range for electromagnetic immunity (EMI)
Very low electromagnetic emission (EME)
Excellent ESD robustness
Guaranteed and improved loop delay symmetry to support CAN FD data
frames up to 2 MBit/s for Japanese OEMs
•
•
•
•
•
•
•
•
•
•
•
•
•
VIO input for voltage adaption to the microcontroller supply
Extended supply range on VCC and VIO supply
CAN short circuit proof to ground, battery and VCC
TxD time-out function
Low CAN bus leakage current in power-down state
Overtemperature protection
Protected against automotive transients
Stand-by mode with remote wake-up function
Wake-up indication on the RxD output
Transmitter supply VCC can be turned off in stand-by mode
Green Product (RoHS compliant)
AEC Qualified
Certified according to latest VeLIO (Vehicle LAN Interoperability & Optimization) test requirements for the
Japanese market
Applications
•
•
•
•
•
Gateway Modules
Body Control Modules (BCMs)
Electric Power steering
Battery Management Systems
Cluster and Lighting Control Modules
Description
The TLE8251VSJ is a transceiver designed for HS CAN networks in automotive and industrial applications. As
an interface between the physical bus layer and the CAN protocol controller, the TLE8251VSJ drives the
Data Sheet
www.infineon.com/transceiver
1
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Overview
signals to the bus and protects the microcontroller against interferences generated within the network. Based
on the high symmetry of the CANH and CANL signals, the TLE8251VSJ provides a very low level of
electromagnetic emission (EME) within a wide frequency range.
The TLE8251VSJ fulfills or exceeds the requirements of the ISO11898-2.
The TLE8251VSJ provides a digital supply input VIO and a stand-by mode. It is designed to fulfill the enhanced
physical layer requirements for CAN FD and supports data rates up to 2 MBit/s.
On the basis of a very low leakage current on the HS CAN bus interface the TLE8251VSJ provides an excellent
passive behavior in power-down state. These and other features make the TLE8251VSJ exceptionally suitable
for mixed supply HS CAN networks.
Based on the Infineon Smart Power Technology SPT, the TLE8251VSJ provides excellent ESD immunity
together with a very high electromagnetic immunity (EMI). The TLE8251VSJ and the Infineon SPT technology
are AEC qualified and tailored to withstand the harsh conditions of the automotive environment.
Two different operating modes, additional fail-safe features like a TxD time-out and the optimized output slew
rates on the CANH and CANL signals make the TLE8251VSJ the ideal choice for large HS CAN networks with
high data transmission rates.
Type
Package
Marking
8251V
TLE8251VSJ
PG-DSO-8
Data Sheet
2
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Table of Contents
1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
3
3.1
3.2
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
4.1
4.2
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
High Speed CAN Physical Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Normal-operating Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Stand-by Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Power-up and Undervoltage Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power-down State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Forced Stand-by Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Undervoltage on the Digital Supply VIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Undervoltage on the Transmitter Supply VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Voltage Adaption to the Microcontroller Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Remote Wake-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2.1
4.2.2
4.3
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.3.6
4.4
5
Fail Safe Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Short Circuit Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Unconnected Logic Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
TxD Time-out Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Overtemperature Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Delay Time for Mode Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1
5.2
5.3
5.4
5.5
6
General Product Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Functional Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1
6.2
6.3
7
7.1
7.2
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Functional Device Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8
8.1
8.2
8.3
8.3.1
8.3.2
8.3.2.1
8.3.2.2
8.4
Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
ESD Robustness according to IEC61000-4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Examples for Mode Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Mode Change to Stand-by Mode during a dominant Bus Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Mode Change from Stand-by Mode to Normal-operating Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Mode Change while the TxD Signal is “low” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Mode Change while the Bus Signal is dominant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Further Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9
Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10
Data Sheet
3
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Block Diagram
2
Block Diagram
3
5
VCC
VIO
Transmitter
7
1
8
TxD
STB
CANH
CANL
Timeout
Driver
Temp-
protection
6
Mode
control
Receiver
Normal-mode receiver
4
Mux
RxD
Wake-logic
& filter
Low-power receiver
VIO
VCC/2
=
Bus-biasing
GND
2
Figure 1
Functional block diagram
Data Sheet
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Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Pin Configuration
3
Pin Configuration
3.1
Pin Assignment
1
2
3
4
8
7
6
5
STB
CANH
CANL
TxD
GND
VCC
RxD
VIO
Figure 2
Pin configuration
3.2
Pin Definitions
Table 1
Pin definitions and functions
Pin No. Symbol Function
1
TxD
Transmit Data Input;
internal pull-up to VIO, “low” for dominant state.
2
3
GND
Ground
VCC
Transmitter Supply Voltage;
100 nF decoupling capacitor to GND required,
VCC can be turned off in stand-by mode.
4
5
RxD
Receive Data Output;
“low” in dominant state.
VIO
Digital Supply Voltage;
supply voltage input to adapt the logical input and output voltage levels of the transceiver
to the microcontroller supply,
supply for the low-power receiver,
100 nF decoupling capacitor to GND required.
6
7
8
CANL
CANH
STB
CAN Bus Low Level I/O;
“low” in dominant state.
CAN Bus High Level I/O;
“high” in dominant state.
Stand-by Input;
internal pull-up to VIO, “low” for normal-operating mode.
Data Sheet
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Rev. 1.0
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TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Functional Description
4
Functional Description
HS CAN is a serial bus system that connects microcontrollers, sensors and actuators for real-time control
applications. The use of the Controller Area Network (abbreviated CAN) within road vehicles is described by
the international standard ISO 11898. According to the 7-layer OSI reference model the physical layer of a
HS CAN bus system specifies the data transmission from one CAN node to all other available CAN nodes within
the network. The physical layer specification of a CAN bus system includes all electrical and mechanical
specifications of a CAN network. The CAN transceiver is part of the physical layer specification. Several
different physical layer standards of CAN networks have been developed in recent years. The TLE8251VSJ is a
High Speed CAN transceiver with a dedicated bus wake-up function and defined by the international standard
ISO 11898-5.
4.1
High Speed CAN Physical Layer
VIO
=
=
Digital supply voltage
Transmitter supply voltage
Transmit data input from
the microcontroller
TxD
VCC
TxD
VIO
=
RxD
=
Receive data output to
the microcontroller
CANH =
CANL =
Bus level on the CANH
input/output
t
t
Bus level on the CANL
input/output
CANH
CANL
VDiff
=
Differential voltage
VCC
between CANH and CANL
VDiff = VCANH – VCANL
VDiff
VCC
“dominant” receiver threshold
“recessive” receiver threshold
t
RxD
VIO
tLoop(H,L)
tLoop(L,H)
t
Figure 3
High speed CAN bus signals and logic signals
Data Sheet
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Rev. 1.0
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TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Functional Description
The TLE8251VSJ is a High-Speed CAN transceiver, operating as an interface between the CAN controller and
the physical bus medium. A HS CAN network is a two wire, differential network which allows data transmission
rates for CAN FD frames up to 2 MBit/s. Characteristic for HS CAN networks are the two signal states on the
HS CAN bus: dominant and recessive (see Figure 3).
VCC, VIO and GND are the supply pins for the TLE8251VSJ. The pins CANH and CANL are the interface to the
HS CAN bus and operate in both directions, as an input and as an output. RxD and TxD pins are the interface
to the CAN controller, the TxD pin is an input pin and the RxD pin is an output pin. The STB pin is the input pin
for mode selection (see Figure 4).
By setting the TxD input pin to logical “low” the transmitter of the TLE8251VSJ drives a dominant signal to the
CANH and CANL pins. Setting TxD input to logical “high” turns off the transmitter and the output voltage on
CANH and CANL discharges towards the recessive level. The recessive output voltage is provided by the bus
biasing (see Figure 1). The output of the transmitter is considered to be dominant, when the voltage difference
between CANH and CANL is greater than 1.5 V (VDiff = VCANH - VCANL).
Parallel to the transmitter the normal-mode receiver monitors the signal on the CANH and CANL pins and
indicates it on the RxD output pin. A dominant signal on the CANH and CANL pins sets the RxD output pin to
logical “low”, vice versa a recessive signal sets the RxD output to logical “high”. The normal-mode receiver
considers a voltage difference (VDiff) between CANH and CANL above 0.9 V as dominant and below 0.5 V as
recessive.
To conform with HS CAN features, like the bit to bit arbitration, the signal on the RxD output has to follow the
signal on the TxD input within a defined loop delay tLoop ≤ 255 ns.
The thresholds of the digital inputs (TxD and STB) and of the RxD output voltage are adapted to the digital
power supply VIO.
Data Sheet
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Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Functional Description
4.2
Modes of Operation
stand-by mode
STB = 1
VCC = “don’t care”
VIO > VIO(UV,R)
STB = 0
STB = 1
normal-operating
mode
VCC > VCC(UV,R)
VIO > VIO(UV,R)
STB = 0
Figure 4
Mode state diagram
4.2.1
Normal-operating Mode
In normal-operating mode the transmitter and the receiver of the HS CAN transceiver TLE8251VSJ are active
(see Figure 1). The HS CAN transceiver sends the serial data stream on the TxD input pin to the CAN bus. The
data on the CAN bus is displayed at the RxD pin simultaneously. A logical “low” signal on the STB pin selects
the normal-operating mode, while the transceiver is supplied by VCC and VIO (see Table 2 for details).
4.2.2
Stand-by Mode
The stand-by mode is an idle mode of the TLE8251VSJ with optimized power consumption. In stand-by mode
the transmitter and the normal-mode receiver are turned off. The TLE8251VSJ cannot send any data to the
CAN bus nor receive any data from the CAN bus.
The low-power receiver is connected to the bus lines. Wake-up signals are indicated on the RxD output pin. An
additional filter, implemented inside the low-power receiver, ensures that only dominant and recessive”
signals on the CAN bus, which are longer than the CAN activity filter time tFilter, are indicated at the RxD output
pin (see Figure 8).
A logical “high” signal on the STB pin selects the stand-by mode, while the transceiver is supplied by the digital
supply VIO (see Table 2 for details).
In stand-by mode the bus input pins are biased to GND via the receiver input resistors Ri.
Undervoltage detection on the transmitter supply VCC is turned off, allowing to switch off the VCC supply in
stand-by mode.
Data Sheet
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Rev. 1.0
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TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Functional Description
4.3
Power-up and Undervoltage Condition
When detecting an undervoltage event, either on the transmitter supply VCC or the digital supply VIO, the
transceiver TLE8251VSJ changes the mode of operation. Turning off the digital power supply VIO, the
transceiver powers down and remains in the power-down state. While switching off the transmitter supply VCC
,
the transceiver either changes to the forced stand-by mode, or remains in stand-by mode (details see
Figure 5).
normal-operating
mode
VIO “on”
VCC “on”
STB “0”
VIO “on”
VCC “on”
STB “0”
STB VCC
VIO
0
“on” “on”
VIO “on”
VCC “off”
STB “0”
VIO “on”
VCC “on”
STB “0”
power-down
state
forced stand-by
mode
VIO “on”
VCC “off”
STB “0”
STB VCC
“X” “X”
VIO
STB VCC
VIO
“off”
0
“off” “on”
VIO “on”
VCC “X”
STB “1”
VIO “on”
VCC “X”
STB “1”
stand-by
mode
VIO “on”
VCC “X”
STB “1”
STB VCC
“X”
VIO
1
“on”
Figure 5
Power-up and undervoltage
Modes of operation
Table 2
Mode
STB
VIO
VCC
Bus Bias Transmitter Normal-mode Low-power
Receiver
Receiver
Normal-operating “low”
Stand-by “high”
“on”
“on”
“on”
“off”
“on”
“X”
V
CC/2
“on”
“off”
“off”
“on”
“off”
GND
GND
“off”
“on”
Forced stand-by “low”
Power-down state “X1)”
“off”
“X”
“off”
“on”
floating “off”
“off”
“off”
1) “X”: Don’t care
Data Sheet
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Rev. 1.0
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TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Functional Description
4.3.1
Power-down State
Independent of the transmitter supply VCC and of the STB input pin, the TLE8251VSJ is in power-down state
when the digital supply voltage VIO is turned off (see Figure 5).
In power-down state the input resistors of the receiver are disconnected from the bus biasing VCC/2. The CANH
and CANL bus interface of the TLE8251VSJ is floating and acts as a high-impedance input with a very low
leakage current. The high-ohmic input does not influence the recessive level of the CAN network and allows
an optimized EME performance of the entire HS CAN network (see also Table 2).
4.3.2
Forced Stand-by Mode
The forced stand-by mode is a fail-safe mode to avoid any disturbance on the HS CAN bus during loss of the
transmitter supply VCC
.
In forced stand-by mode, the transmitter and the normal-mode receiver are turned off and therefore the
transceiver TLE8251VSJ can not disturb the bus media.
Similar to stand-by mode, the low-power receiver is connected to the bus lines and wake-up signals on the
CAN bus are indicated at the RxD output pin (see Figure 8).
In forced stand-by mode the bus is also biased to GND (details see Table 2) via the receiver input resistors.
Forced stand-by mode can only be entered when the transmitter supply VCC is not available, either by
powering up the digital supply VIO only or by turning off the transmitter supply in normal-operating mode.
While the transceiver TLE8251VSJ is in forced stand-by mode, switching the STB input pin to logical “high”
triggers a mode change to stand-by mode (see Figure 5).
4.3.3
Power-up
The HS CAN transceiver TLE8251VSJ powers up if at least the digital supply VIO is connected to the device. By
default the device powers up in stand-by mode, due to the internal pull-up resistor on the STB pin to VIO.
In case the device is to power-up to normal-operating mode, the STB pin needs to be pulled active to logical
“low” and the supplies VIO and VCC have to be connected.
By supplying only the digital power supply VIO the TLE8251VSJ powers up either in forced stand-by mode or
stand-by mode, depending on the signal of the STB input pin (see Figure 5).
Data Sheet
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Rev. 1.0
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TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Functional Description
4.3.4
Undervoltage on the Digital Supply VIO
If the voltage on VIO supply input falls below the threshold VIO < VIO(UV,F), the transceiver TLE8251VSJ powers
down and changes to power-down state.
Undervoltage detection on the digital supply VIO has the highest priority. It is independent of the transmitter
supply VCC and also independent of the currently selected operating mode. Any undervoltage event on VIO
powers down the TLE8251VSJ.
transmitter supply voltage VCC = “don’t care”
VIO
VIO undervoltage monitor
VIO(UV,R)
hysteresis
VIO(UV,H)
VIO undervoltage monitor
VIO(UV,F)
tDelay(UV) delay time undervoltage
t
any mode of operation
power-down state
stand-by mode
STB
“high” due the internal
pull-up resistor1)
“X” = don’t care
t
1) assuming no external signal applied
Figure 6
Undervoltage on the digital supply VIO
Data Sheet
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Rev. 1.0
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TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Functional Description
4.3.5
Undervoltage on the Transmitter Supply VCC
In case the transmitter supply VCC falls below the threshold VCC < VCC(UV,F), the transceiver TLE8251VSJ changes
the mode of operation to forced stand-by mode. The transmitter and also the normal-mode receiver of the
TLE8251VSJ are powered by the VCC supply. In case of insufficient VCC supply, the TLE8251VSJ can neither
transmit the CANH and CANL signals correctly to the bus, nor can it receive them properly. Therefore the
TLE8251VSJ blocks the transmitter and the receiver in forced stand-by mode. The low-power receiver is active
in forced stand-by mode (see Figure 7).
Undervoltage detection on the transmitter supply VCC is only active in normal-operating mode (see Figure 5).
digital supply voltage VIO = “on”
VCC
V
CC undervoltage monitor
VCC(UV,R)
hysteresis
VCC(UV,H)
V
CC undervoltage monitor
VCC(UV,F)
tDelay(UV) delay time undervoltage
t
t
normal-operating mode
forced stand-by mode
normal-operating mode
STB
Assuming the STB remains “low”. The “low” signal is driven by the external microcontroller
Figure 7
Undervoltage on the transmitter supply VCC
4.3.6
Voltage Adaption to the Microcontroller Supply
The HS CAN transceiver TLE8251VSJ has two different power supplies, VCC and VIO. The power supply VCC
supplies the transmitter and the normal-mode receiver. The power supply VIO supplies the digital input and
output buffers, the low-power receiver and the wake-up logic. It is also the main power domain for the internal
logic.
To adjust the digital input and output levels of the TLE8251VSJ to the I/O levels of the external microcontroller,
connect the power supply VIO to the microcontroller I/O supply voltage (see Figure 14).
Note:
In case the digital supply voltage VIO is not required in the application, connect the digital supply
voltage VIO to the transmitter supply VCC
.
Data Sheet
12
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Functional Description
4.4
Remote Wake-up
The TLE8251VSJ has a remote wake-up feature, also called bus wake-up feature. In both stand-by mode and
forced stand-by mode, the low-power receiver monitors the activity on the CAN bus and in case it detects a
wake-up signal, the TLE8251VSJ indicates the wake-up signal on the RxD output pin.
While entering stand-by mode, the RxD output pin is set to logical “high”, regardless of the signal on the CAN
bus. The low-power receiver of the TLE8251VSJ requires a signal change from recessive to dominant on the
CAN bus before the RxD output is enabled to follow the signals on the HS CAN bus.
HS CAN bus signals, dominant or recessive, with a pulse width above the CAN activity filter time t > tFilter are
indicated on the RxD output pin. Glitches with a pulse width below the CAN activity filter time t < tFilter are
ignored and not considered a valid wake-up signal. The RxD output reacts within the reaction time tWU_Rec after
detecting a wake-up signal (see Figure 8).
Note:
A wake-up event on the CAN bus is only indicated on the RxD output, no automatic change of the
operating mode is applied. To enter normal-operating mode, the external microcontroller needs to
change the signal on the STB pin.
The wake-up logic is supplied by the power supply VIO (see Figure 1). In case the TLE8251VSJ is in stand-by
mode the power supply VCC can be turned off, while the TLE8251VSJ is still able to detect a wake-up signal on
the HS CAN bus (see also Figure 4).
VDiff = VCANH - VCANL
t < tFilter
t = tFilter
1.15 V
t = tWU_Rec
t = tFilter
0.4 V
t = tWU_Rec
VDiff
1.15V
0.4V
t
t
RxD
STB
0.7 x VIO
0.3 x VIO
t
Figure 8
Wake-up pattern
Data Sheet
13
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Fail Safe Functions
5
Fail Safe Functions
5.1
Short Circuit Protection
The CANH and CANL bus outputs are short circuit proof, either against GND or a positive supply voltage. A
current limiting circuit protects the transceiver against damage. If the device is heating up due to a continuous
short on the CANH or CANL, the internal overtemperature protection switches off the bus transmitter.
5.2
Unconnected Logic Pins
All logic input pins have an internal pull-up resistor to VIO. In case VIO supply is activated and the logic pins are
open, the TLE8251VSJ enters stand-by mode by default. In stand-by mode the transmitter of the TLE8251VSJ
is disabled, the bus bias is turned off and the input resistors of CANH and CANL are connected to GND.
5.3
TxD Time-out Function
The TxD time-out feature protects the CAN bus against permanent blocking in case the logical signal on the
TxD pin is continuously “low”. A continuous “low” signal on the TxD pin might have its root cause in a locked-
up microcontroller or in a short circuit on the printed circuit board, for example. In normal-operating mode, a
logical “low” signal on the TxD pin for the time t > tTxD enables the TxD time-out feature and the TLE8251VSJ
disables the transmitter (see Figure 9). The receiver is still active and the the RxD output continues monitoring
data on the bus.
t > tTxD
TxD time-out
TxD time–out released
CANH
CANL
t
TxD
RxD
t
t
Figure 9
TxD time-out function
Figure 9 illustrates how the transmitter is deactivated and activated again. A permanent “low” signal on the
TxD input pin activates the TxD time-out function and deactivates the transmitter. To release the transmitter
after a TxD time-out event the TLE8251VSJ requires a signal change on the TxD input pin from logical “low” to
logical “high”.
Data Sheet
14
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Fail Safe Functions
5.4
Overtemperature Protection
The integrated overtemperature detection protects the TLE8251VSJ against thermal overstress of the
transmitter. Overtemperature protection is active in normal-operating mode and disabled in stand-by mode.
In overtemperature condition, the temperature sensor disables the transmitter (see Figure 1) while the
transceiver remains in normal-operating mode.
After the device has cooled down the transmitter is activated again (see Figure 10). A hysteresis is
implemented within the temperature sensor.
TJSD (shut down temperature)
cool down
TJ
˂T
switch-on transmitter
t
CANH
CANL
t
TxD
t
RxD
t
Figure 10
Overtemperature protection
5.5
Delay Time for Mode Change
The HS CAN transceiver TLE8251VSJ changes the mode of operation within the time window tMode. During the
mode change the RxD output pin is permanently set to logical “high” and does not reflect the status on the
CANH and CANL input pins.
While changing the mode of operation from normal-operating mode to stand-by mode, the transceiver
TLE8251VSJ turns off the transmitter and switches from the normal-mode receiver to the low-power receiver.
After the mode change is completed, the transceiver TLE8251VSJ releases the RxD output pin (see as an
example Figure 16 and Figure 17).
Data Sheet
15
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
General Product Characteristics
6
General Product Characteristics
6.1
Absolute Maximum Ratings
Table 3
Absolute maximum ratings voltages, currents and temperatures1)
All voltages with respect to ground; positive current flowing into pin;
(unless otherwise specified)
Parameter
Symbol
Values
Unit Note or Test Condition Number
Min. Typ. Max.
Voltages
Transmitter supply voltage VCC
Digital supply voltage VIO
-0.3
-0.3
-40
-40
-40
–
–
–
–
–
6.0
6.0
40
V
V
V
V
V
–
–
–
–
–
P_6.1.1
P_6.1.2
P_6.1.3
P_6.1.4
P_6.1.5
CANH DC voltage versus GND VCANH
CANL DC voltage versus GND VCANL
40
Differential voltage between VCAN_Diff
40
CANH and CANL
Voltages at the input pins:
STB, TxD
VMAX_IN
-0.3
-0.3
–
–
6.0
V
V
–
–
P_6.1.6
P_6.1.7
Voltages at the output pin:
RxD
VMAX_OUT
VIO
Currents
RxD output current
Temperatures
IRxD
-20
–
20
mA
–
P_6.1.8
Junction temperature
Storage temperature
ESD Resistivity
Tj
-40
-55
–
–
150
150
°C
°C
–
–
P_6.1.9
TS
P_6.1.10
ESD immunity at CANH, CANL VESD_HBM_CAN -10
versus GND
–
–
–
10
2
kV
kV
V
HBM
P_6.1.11
P_6.1.12
P_6.1.13
(100 pF via 1.5 kΩ)2)
ESD immunity at all other
pins
VESD_HBM_ALL -2
VESD_CDM -750
HBM
(100 pF via 1.5 kΩ)2)
ESD immunity to GND
750
CDM3)
1) Not subject to production test, specified by design
2) ESD susceptibility, Human Body Model “HBM” according to ANSI/ESDA/JEDEC JS-001
3) ESD susceptibility, Charge Device Model “CDM” according to EIA/JESD22-C101 or ESDA STM5.3.1
Note:
Stresses above the ones listed here may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability. Integrated
protection functions are designed to prevent IC destruction under fault conditions described in the
data sheet. Fault conditions are considered as “outside” normal-operating range. Protection
functions are not designed for continuos repetitive operation.
Data Sheet
16
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
General Product Characteristics
6.2
Functional Range
Table 4
Functional range
Parameter
Symbol
Values
Unit Note or Test Condition
Number
Min. Typ. Max.
Supply Voltages
Transmitter supply voltage VCC
4.5
3.0
–
–
5.5
5.5
V
V
–
–
P_6.2.1
P_6.2.2
Digital supply voltage
Thermal Parameters
Junction temperature
VIO
1)
Tj
-40
–
150
°C
P_6.2.3
1) Not subject to production test, specified by design.
Note:
Within the functional range the IC operates as described in the circuit description. The electrical
characteristics are specified within the conditions given in the related electrical characteristics
table.
6.3
Thermal Resistance
Note:
This thermal data was generated in accordance with JEDEC JESD51 standards. For more
information, please visit www.jedec.org.
Table 5
Thermal resistance1)
Parameter
Symbol
Values
Unit Note or Test Condition
K/W 2) TLE8251VSJ
Number
P_6.3.1
Min. Typ. Max.
Thermal Resistances
Junction to Ambient PG-
DSO-8
RthJA
–
130
–
Thermal Shutdown (junction temperature)
Thermal shutdown
temperature
TJSD
150
175
10
200
–
°C
K
–
–
P_6.3.2
P_6.3.3
Thermal shutdown
hysteresis
ΔT
–
1) Not subject to production test, specified by design
2) Specified RthJA value is according to Jedec JESD51-2,-7 at natural convection on FR4 2s2p board. The product
(TLE8251VSJ) was simulated on a 76.2 x 114.3 x 1.5 mm board with 2 inner copper layers (2 x 70µm Cu, 2 x 35µm Cu).
Data Sheet
17
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Electrical Characteristics
7
Electrical Characteristics
7.1
Functional Device Characteristics
Table 6
Electrical characteristics
4.5 V < VCC < 5.5 V; 3.0 V < VIO < 5.5 V; RL = 60 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive
current flowing into pin; unless otherwise specified.
Parameter
Symbol
Values
Unit Note or Test Condition
Number
Min. Typ. Max.
Current Consumption
Current consumption at VCC ICC
normal-operating mode
–
–
–
–
–
–
2.6
38
–
4
mA recessive state,
P_7.1.1
P_7.1.2
P_7.1.3
P_7.1.4
P_7.1.5
P_7.1.6
VTxD = VIO, VSTB = 0 V;
Current consumption at VCC ICC
normal-operating mode
60
1
mA dominant state,
VTxD = VSTB = 0 V;
Current consumption at VIO IIO
normal-operating mode
mA VSTB = 0 V;
Current consumption at VCC ICC(STB)
stand-by mode
–
5
µA VTxD = VSTB = VIO;
Current consumption at VIO IIO(STB)
stand-by mode
8
14
µA VTxD = VSTB = VIO,
0 V < VCC < 5.5 V;
Current consumption at VIO IIO(STB)_105
stand-by mode @ 105°C
6
12.5 µA VTxD = VSTB = VIO,
0 V < VCC < 5.5 V,
T < 105°C;
Supply Resets
V
CC undervoltage monitor
VCC(UV,R)
VCC(UV,F)
VCC(UV,H)
VIO(UV,R)
VIO(UV,F)
VIO(UV,H)
tDelay(UV)
3.8
4.0
4.3
V
–
P_7.1.7
P_7.1.8
P_7.1.9
P_7.1.10
P_7.1.11
P_7.1.12
P_7.1.13
rising edge
VCC undervoltage monitor
falling edge
3.65 3.85 4.3
V
–
1)
VCC undervoltage monitor
hysteresis
–
150
2.5
2.3
200
–
–
mV
V
VIO undervoltage monitor
2.0
1.8
–
3.0
3.0
–
–
rising edge
VIO undervoltage monitor
falling edge
V
–
1)
VIO undervoltage monitor
hysteresis
mV
µs
VCC and VIO undervoltage
delay time, rising edge
–
100
1) (see Figure 6 and
Figure 7);
Data Sheet
18
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Electrical Characteristics
Table 6
Electrical characteristics (cont’d)
4.5 V < VCC < 5.5 V; 3.0 V < VIO < 5.5 V; RL = 60 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive
current flowing into pin; unless otherwise specified.
Parameter
Symbol
Values
Unit Note or Test Condition
Number
Min. Typ. Max.
Receiver Output RxD
“High” level output current IRD,H
–
2
-4
4
-2
–
mA VRxD = VIO - 0.4 V,
VDiff < 0.5 V;
P_7.1.14
P_7.1.15
“Low” level output current
Transmission Input TxD
IRD,L
mA VRxD = 0.4 V, VDiff > 0.9 V;
“High” level input voltage
threshold
VTxD,H
VTxD,L
–
0.5
× VIO × VIO
0.7
V
V
recessive state;
dominant state;
P_7.1.16
P_7.1.17
“Low” level input voltage
threshold
0.3
× VIO × VIO
0.4
–
Pull-up resistance
Input hysteresis
Input capacitance
RTxD
10
–
25
450
–
50
–
kΩ
mV
pF
–
P_7.1.18
P_7.1.19
P_7.1.20
1)
VHYS(TxD)
CTxD
1)
–
10
16
TxD permanent dominant
time-out
tTxD
4.5
–
ms normal-operating mode; P_7.1.21
Stand-by Input STB
“High” level input voltage
threshold
VSTB,H
VSTB,L
–
0.5
× VIO × VIO
0.7
V
V
stand-by mode;
P_7.1.22
“Low” level input voltage
threshold
0.3
× VIO × VIO
0.4
–
normal-operating mode; P_7.1.23
Pull-up resistance
Input capacitance
Input hysteresis
Bus Receiver
RSTB
10
–
25
–
50
10
–
kΩ
pF
–
P_7.1.24
P_7.1.25
P_7.1.26
1)
CSTB
1)
VHYS(STB)
–
200
mV
2)
Differential receiver
threshold dominant
normal-operating mode
VDiff_D
–
0.75 0.9
V
V
P_7.1.27
P_7.1.28
2)
Differential receiver
threshold recessive
normal-operating mode
VDiff_R
0.5
0.66
–
1) 2)
1) 2)
2)
Differential range dominant VDiff_D_Range 0.9
normal-operating mode
-
-
8.0
0.5
V
V
V
P_7.1.29
P_7.1.30
P_7.1.31
Differential range recessive VDiff_R_Range -3.0
normal-operating mode
Differential receiver
threshold dominant
stand-by mode
VDiff_D_STB
–
0.75 1.15
Data Sheet
19
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Electrical Characteristics
Table 6
Electrical characteristics (cont’d)
4.5 V < VCC < 5.5 V; 3.0 V < VIO < 5.5 V; RL = 60 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive
current flowing into pin; unless otherwise specified.
Parameter
Symbol
Values
Unit Note or Test Condition
Number
P_7.1.32
Min. Typ. Max.
2)
Differential receiver
threshold recessive
stand-by mode
VDiff_R_STB 0.4
0.72
–
V
1)2)
Differential range dominant VDiff_D_Range 1.15
Stand-by mode
-
-
8.0
0.4
V
P_7.1.33
P_7.1.34
_STB
1)2)
Differential range recessive VDiff_R_Range -3.0
V
Stand-by mode
_STB
Common mode range
CMR
-12
–
–
12
–
V
VCC = 5 V;
1)
P_7.1.35
P_7.1.36
Differential receiver
hysteresis
VDiff,hys
90
mV
normal-operating mode
CANH, CANL input resistance Ri
Differential input resistance RDiff
10
20
- 1
20
40
–
30
60
1
kΩ recessive state;
kΩ recessive state;
P_7.1.37
P_7.1.38
P_7.1.39
Input resistance deviation
between CANH and CANL
ΔRi
%
1) recessive state;
1)
Input capacitance CANH,
CANL versus GND
CIn
–
–
20
10
40
20
pF
pF
V
V
= VIO;
= VIO:
P_7.1.40
P_7.1.41
TxD
TxD
1)
Differential input
capacitance
CIn_Diff
Bus Transmitter
CANL/CANH recessive
output voltage
normal-operating mode
VCANL/H_R
2.0
2.5
–
3.0
50
V
VTxD = VIO,
no load;
P_7.1.42
P_7.1.43
P_7.1.44
P_7.1.45
P_7.1.46
P_7.1.47
CANH, CANL recessive
output voltage difference
normal-operating mode
VDiff_NM
-500
mV VTxD = VIO,
no load;
CANH, CANL recessive
output voltage
stand-by mode
VCANL,H_STB -0.1
–
0.1
0.2
2.25
4.5
V
V
V
V
no load;
no load;
VTxD = 0 V;
VTxD = 0 V;
CANH, CANL recessive
output voltage difference
stand-by mode
VDiff_STB
-0.2
0.5
–
CANL dominant
output voltage
normal-operating mode
VCANL
–
CANH dominant
VCANH
2.75
–
output voltage
normal-operating mode
Data Sheet
20
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Electrical Characteristics
Table 6
Electrical characteristics (cont’d)
4.5 V < VCC < 5.5 V; 3.0 V < VIO < 5.5 V; RL = 60 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive
current flowing into pin; unless otherwise specified.
Parameter
Symbol
Values
Unit Note or Test Condition
Number
P_7.1.48
Min. Typ. Max.
CANH, CANL dominant
output voltage difference
normal-operating mode
according to ISO 11898-2
VDiff
1.5
–
3.0
V
VTxD = 0 V,
50 Ω < RL < 65 Ω,
4.75 < VCC < 5.25 V;
VDiff = VCANH - VCANL
CANH, CANL dominant
output voltage difference
normal-operating mode
VDiff_EXT
1.4
1.5
–
–
3.3
5
V
V
V
VTxD = 0 V,
45 Ω < RL < 70 Ω,
4.75 < VCC < 5.25 V;
P_7.1.49
P_7.1.50
VDiff = VCANH - VCANL
CANH, CANL dominant
output voltage difference
normal-operating mode
VDiff_HEXT
VTxD = 0 V,
static behavior,
RL = 2240Ω,
VDiff = VCANH - VCANL
4.75 < VCC < 5.25 V 1)
;
Driver dominant symmetry VSYM
normal-operating mode
VSYM = VCANH + VCANL
4.5
40
5
5.5
100
-40
5
VCC = 5.0 V, VTxD = 0 V;
P_7.1.51
P_7.1.52
P_7.1.53
P_7.1.54
P_7.1.55
CANL short circuit current
CANH short circuit current
Leakage current, CANH
Leakage current, CANL
ICANLsc
75
mA VCANLshort = 18 V,
VCC = 5.0 V, t < tTxD
,
,
VTxD = 0 V;
ICANHsc
ICANH,lk
ICANL,lk
-100 -75
mA VCANHshort = -3 V,
VCC = 5.0 V, t < tTxD
VTxD = 0 V;
-5
-5
–
–
µA VCC = VIO = 0 V,
0 V < VCANH < 5 V,
VCANH = VCANL;
5
µA VCC = VIO = 0 V,
0 V < VCANL < 5 V,
VCANH = VCANL;
Data Sheet
21
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Electrical Characteristics
Table 6
Electrical characteristics (cont’d)
4.5 V < VCC < 5.5 V; 3.0 V < VIO < 5.5 V; RL = 60 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive
current flowing into pin; unless otherwise specified.
Parameter
Symbol
Values
Unit Note or Test Condition
Number
Min. Typ. Max.
Dynamic CAN-Transceiver Characteristics
Propagation delay
TxD-to-RxD “low”
(“recessive to dominant)
td(L),TR
td(H),TR
td(L),T
td(H),T
td(L),R
td(H),R
–
–
–
–
–
–
170
170
90
230
230
140
140
140
140
ns
ns
ns
ns
ns
ns
CL = 100 pF,
4.75 V < VCC < 5.25 V,
C = 15 pF;
P_7.1.56
P_7.1.57
P_7.1.58
P_7.1.59
P_7.1.60
P_7.1.61
Propagation delay
TxD-to-RxD “high”
(dominant to recessive)
CL = 100 pF,
4.75 V < VCC < 5.25 V,
CRxD = 15 pF;
Propagation delay
TxD “low” to bus dominant
CL = 100 pF,
4.75 V < VCC < 5.25 V,
CRxD = 15 pF;
Propagation delay
TxD “high” to bus recessive
90
CL = 100 pF,
4.75 V < VCC < 5.25 V,
CRxD = 15 pF;
Propagation delay
bus dominant to RxD “low”
90
CL = 100 pF,
4.75 V < VCC < 5.25 V,
CRxD = 15 pF;
Propagation delay
90
CL = 100 pF,
bus recessive to RxD “high”
4.75 V < VCC < 5.25 V,
CRxD = 15 pF;
Delay Times
Delay time for mode change tMode
–
–
–
–
20
5
µs
µs
1) (see Figure 16);
1) (see Figure 17);
P_7.1.62
P_7.1.63
RxD reaction delay,
stand-by mode to normal-
operating mode,
tRxD_Rec
CAN activity filter time
Wake-up reaction time
tFilter
0.5
–
–
–
5
5
µs
µs
(see Figure 8);
1) (see Figure 8);
P_7.1.64
P_7.1.65
tWU_Rec
Data Sheet
22
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Electrical Characteristics
Table 6
Electrical characteristics (cont’d)
4.5 V < VCC < 5.5 V; 3.0 V < VIO < 5.5 V; RL = 60 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive
current flowing into pin; unless otherwise specified.
Parameter
Symbol
Values
Unit Note or Test Condition
Number
Min. Typ. Max.
CAN FD Characteristics -
Received recessive bit width tBit(RxD)_2MB 430
at 2 MBit/s
500
500
–
530
530
20
ns
ns
ns
CL = 100 pF,
4.75 V < VCC < 5.25 V,
P_7.1.66
CRxD = 15 pF, tBit = 500 ns,
(see Figure 13);
Transmitted recessive bit
width
tBit(Bus)_2MB 450
CL = 100 pF,
P_7.1.67
P_7.1.68
4.75 V < VCC < 5.25 V,
CRxD = 15 pF, tBit = 500 ns,
(see Figure 13);
at 2 MBit/s
Receiver timing symmetry
at 2 MBit/s
ΔtRec_2MB
-45
CL = 100 pF,
4.75 V < VCC < 5.25 V,
ΔtRec = tBit(RxD) - tBit(Bus)
CRxD = 15 pF, tBit = 500 ns,
(see Figure 13);
1) Not subject to production test, specified by design.
2) In respect to common mode range.
Data Sheet
23
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Electrical Characteristics
7.2
Diagrams
5
VIO
100 nF
7
6
CANH
CANL
1
8
TxD
STB
CL
RL
4
3
RxD
VCC
CRxD
GND
2
100 nF
Figure 11
Test circuits for dynamic characteristics
TxD
0.7 x VIO
0.3 x VIO
t
t
td(L),T
td(H),T
VDiff
0.9 V
0.5 V
td(H),R
td(L),R
tLoop(H,L)
tLoop(L,H)
RxD
0.7 x VIO
0.3 x VIO
t
Figure 12
Timing diagrams for dynamic characteristics
Data Sheet
24
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Electrical Characteristics
TxD
0.7 x VIO
0.3 x VIO
0.3 x VIO
t
t
5 x tBit
tBit
tLoop(H,L)
tBit(Bus)
VDiff = VCANH - VCANL
VDiff
0.9 V
0.5 V
tLoop(L,H)
tBit(RxD)
RxD
0.7 x VIO
0.3 x VIO
t
Figure 13
Recessive bit time - five dominant bits followed by one recessive bit
Data Sheet
25
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Application Information
8
Application Information
8.1
ESD Robustness according to IEC61000-4-2
Tests for ESD robustness according to IEC61000-4-2 “Gun test” (150 pF, 330 Ω) have been performed. The
results and test conditions are available in a separate test report.
Table 7
ESD robustness according to IEC61000-4-2
Result Unit
Performed Test
Remarks
Electrostatic discharge voltage at pin CANH and ≥ +8
kV
1)Positive pulse
CANL versus GND
Electrostatic discharge voltage at pin CANH and ≤ -8
kV
1)Negative pulse
CANL versus GND
1) ESD susceptibility “ESD GUN” according to GIFT / ICT paper: “EMC Evaluation of CAN Transceivers, version 03/02/IEC
TS62228”, section 4.3. (DIN EN61000-4-2)
Tested by external test facility (IBEE Zwickau, EMC test report no. TBD).
Data Sheet
26
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Application Information
8.2
Application Example
VBAT
I
Q1
Q2
22 uF
TLE4476D
GND
100 nF
CANH
CANL
EN
100 nF
3
VCC
100 nF
22 uF
VIO
5
8
1
4
120
Ohm
TLE8251VSJ
VCC
Out
Out
In
STB
7
6
CANH
CANL
TxD
RxD
Microcontroller
e.g. XC22xx
optional:
common mode choke
GND
GND
2
I
Q1
Q2
22 uF
TLE4476D
GND
100 nF
EN
3
VCC
100 nF
22 uF
VIO
100 nF
5
8
1
4
TLE8251VSJ
VCC
Out
STB
7
6
CANH
Out
In
TxD
RxD
Microcontroller
e.g. XC22xx
CANL
2
optional:
common mode choke
GND
120
Ohm
GND
CANH
CANL
example ECU design
Figure 14
Application circuit
8.3
Examples for Mode Changes
Changing the status on the STB input pin triggers a change of the operating mode, disregarding the actual
signal on the CANH, CANL and TxD pins (see also Chapter 4.2).
Data Sheet
27
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Application Information
Mode changes are triggered by the STB pin when the device TLE8251VSJ is fully supplied. Setting the STB pin
to logical “low” changes the mode of operation to normal-operating mode:
•
The mode change is executed independently of the signal on the HS CAN bus. The CANH, CANL inputs may
be either dominant or recessive. They can be also permanently shorted to GND or VCC
.
•
A mode change is performed independently of the signal on the TxD input. The TxD input may be either
logical “high” or “low”.
Analog to that, changing the STB input pin to logical “high” changes the mode of operation to the stand-by
mode, independent on the signals at the CANH, CANL and TxD pins.
Note:
In case the TxD signal is “low” setting the STB input pin to logical “low” changes the operating mode
of the device to normal-operating mode and drives a dominant signal to the HS CAN bus.
Note:
The TxD time-out is only effective in normal-operating mode. The TxD time-out timer starts when the
TLE8251VSJ enters normal-operating mode and the TxD input is set to logical “low”.
Data Sheet
28
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Application Information
8.3.1
Mode Change to Stand-by Mode during a dominant Bus Signal
Figure 15 shows an example of mode change from normal-operating mode to stand-by mode while the signal
on the HS CAN bus is dominant.
During the mode transition time tMode, the TLE8251VSJ blocks the RxD output and provides a logical “high” on
the RxD output pin. The internal receiver switches from the normal-mode receiver to the low-power receiver,
while changing from normal-operating mode to stand-by mode.
After entering stand-by mode the TLE8251VSJ continues to indicate a “high” signal on the RxD output as long
as the HS CAN bus remains dominant. The permanent dominant bus signal is not considered a wake-up event
and is therefore not indicated on the RxD output pin.
Detecting the first signal change from recessive to dominant on the HS CAN bus releases the internal wake-up
logic. Within the wake-up reaction time tWU_Rec, a recessive CAN bus signal is indicated on the RxD output pin
by a logical “high” signal and a dominant CAN bus signal is indicated by a logical “low” signal, as long as the
pulse width of the HS CAN bus signals exceeds CAN activity filter time t > tFilter
.
Entering stand-by mode while the HS CAN bus signal is recessive, a release of the internal wake-up logic is not
necessary and a dominant wake-up signal (t > tFilter) on the HS CAN bus is indicated on the RxD output pin
within the wake-up reaction time tWU_Rec (compare to Figure 8).
Note: The “dominant” signal on the HS CAN bus is set by another HS CAN bus subscriber.
t = tMode
STB
t
normal-operating
transition
stand-by mode
TxD
VDiff
t
t
t
Filter + tWU_Rec
tFilter + tWU_Rec
t
Filter + tWU_Rec
tFilter + tWU_Rec
VDiff = VCANH - VCANL
1.15V
1.15V
0.4V
0.4V
first change “recessive” to “dominant”
RxD
t
RxD “high”
RxD “low”
indicating a
“dominant” bus
signal
RxD “high”
due to the
mode
RxD “low”
indicating a
“dominant” bus
wake-up signal
RxD “high”
indicating a
“recessive” bus
wake-up signal
The low-power receiver is not detecting a wake-up as
long the bus signal is permanently “dominant”. The first
change from to “recessive” to “dominant” releases the
wake-up logic.
transition
Figure 15
Change to stand-by mode during bus dominant
Data Sheet
29
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Application Information
8.3.2
Mode Change from Stand-by Mode to Normal-operating Mode
8.3.2.1
Mode Change while the TxD Signal is “low”
Figure 16 shows an example of mode change to normal-operating mode while the TxD input is logical “low”.
The HS CAN signal is recessive, assuming all other HS CAN bus subscribers are also sending a recessive bus
signal.
While the TLE8251VSJ is in stand-by mode, the transmitter and the normal-mode receiver are turned off. In
stand-by mode the low-power receiver is active. The TLE8251VSJ drives no signal to the HS CAN bus, the RxD
output is connected to the low-power receiver and follows only the HS_CAN bus signals when its pulse width
exceeds CAN activity filter time tFilter. Changing the STB to logical “low” turns the mode of operation to normal-
operating mode, while the TxD input signal remains logical “low”. The transmitter and the normal-mode
receiver remain disabled until the mode transition is completed. During the mode transition the RxD output is
blocked and set to logical “high”. In normal-operating mode the transmitter and the normal-mode receiver
are active. The “low” signal on the TxD input drives a dominant signal to the HS CAN bus and the RxD output
becomes logical “low” following the dominant signal on the HS CAN bus.
Changing the STB pin back to logical “high”, disables the transmitter and normal-mode receiver again. The
RxD output pin is blocked and set to logical “high” with the start of the mode transition. The TxD input and the
transmitter are blocked and the HS CAN bus becomes recessive.
Note: The signals on the HS CAN bus are “recessive”, the “dominant” signal is
generated by the TxD input signal
t = tMode
t = tMode
STB
TxD
t
t
VDiff
RxD
t
t
stand-by mode transition
normal-operating
transition
stand-by mode
low-power receiver RxD output
normal-mode receiver
active
RxD output
blocked
low-power receiver active
active
blocked
TxD input and transmitter
active
TxD input and transmitter blocked
TxD input and transmitter blocked
Figure 16
Mode change from stand-by mode to normal-operating mode
Data Sheet
30
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Application Information
8.3.2.2
Mode Change while the Bus Signal is dominant
Figure 17 shows an example of mode change while the bus is dominant and the TxD input signal is set to
logical “high”.
While the TLE8251VSJ is in stand-by mode, the transmitter and the normal-mode receiver are turned off. In
stand-by mode the low-power receiver is active. The TLE8251VSJ drives no signal to the HS CAN bus, the RxD
output is connected to the low-power receiver and follows only the HS_CAN bus signals when its pulse width
exceeds the bus wake-up time tWU. Changing the STB to logical “low” turns the mode of operation to normal-
operating mode, while the TxD input signal remains logical “high”. The transmitter and the normal-mode
receiver remain disabled until the mode transition is completed. During the mode transition the RxD output is
blocked and set to logical “high”. In normal-operating mode the normal-mode receiver is active and the RxD
output follows the dominant signal on the HS CAN bus by indicating a logical “low” signal.
Changing the STB pin back to logical “high”, disables the transmitter and normal-mode receiver again. The
RxD output pin is blocked and set to logical “high” with the start of the mode transition. The low-power
receiver is active in stand-by mode. The RxD output signal remains “high” as long as the HS CAN bus remains
dominant. Only if the HS CAN bus changes to a recessive signal exceeding CAN activity filter time tFilter, the RxD
output follows the bus signal within wake-up reaction time tWU_Rec (see also Chapter 8.3.1).
Note: The “dominant” signal on the HS CAN bus is set by another HS CAN bus subscriber.
t = tMode
t = tMode
STB
TxD
VDiff
t
t
t
t
tFilter + tWU_Rec
tRxD_Rec
RxD
stand-by mode
transition
normal-operating
transition
stand-by mode
RxD output
blocked
RxD output
blocked
low-power receiver active
normal-mode receiver active
low-power receiver active
TxD input and transmitter blocked
TxD input & transmitter active
TxD input and transmitter blocked
Figure 17
Receiving a dominant signal from the bus during a mode change
Data Sheet
31
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Application Information
8.4
Further Application Information
•
•
•
Please contact us for information regarding the pin FMEA.
Existing application note.
For further information you may visit: http://www.infineon.com/transceiver
Data Sheet
32
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Package Outline
9
Package Outline
0.35 x 45˚
1)
4-0.2
C
1.27
B
0.1
±0.25
0.64
+0.1 2)
-0.06
0.41
±0.2
6
M
M
0.2
A B 8x
0.2
C 8x
8
1
5
4
A
1)
5-0.2
Index Marking
1) Does not include plastic or metal protrusion of 0.15 max. per side
2) Lead width can be 0.61 max. in dambar area
GPS01181
Figure 18
PG-DSO-8 (Plastic Dual Small Outline PG-DSO-8)
Green Product (RoHS compliant)
To meet the world-wide customer requirements for environmentally friendly products and to be compliant
with government regulations the device is available as a green product. Green products are RoHS compliant
(i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020).
For further information on alternative packages, please visit our website:
http://www.infineon.com/packages.
Dimensions in mm
Data Sheet
33
Rev. 1.0
2016-07-15
TLE8251V
High Speed CAN Transceiver with Bus Wake-up
Revision History
10
Revision History
Revision
1.0
Date
Changes
2016-07-15 Data Sheet created.
Data Sheet
34
Rev. 1.0
2016-07-15
Please read the Important Notice and Warnings at the end of this document
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Edition 2016-07-15
Published by
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hereby disclaims any and all warranties and liabilities
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