TLT9251VLE [INFINEON]
AEC-Q100 Grade 0;
| 型号： | TLT9251VLE |
| 厂家： | 
Infineon |
| 描述： | AEC-Q100 Grade 0 |
| 文件： | 总30页 (文件大小：1029K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TLT9251VLE
High Speed CAN FD Transceiver
1
Overview
Features
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Fully compliant to ISO 11898-2 (2016) and SAE J2284-4/-5
PG-TSON-8
Infineon automotive quality
AEC-Q100 Grade 0 (Ta: -40°C to +150°C) qualification for high temperature mission profiles
Guaranteed loop delay symmetry for CAN FD data frames up to 5 MBit/s
Very low electromagnetic emission (EME) allows the use without additional common mode choke
V
IO input for voltage adaption to the µC interface (3.3V & 5V)
Bus Wake-up Pattern (WUP) function with optimized filter time (0.5µs -1.8µs) for worldwide OEM usage
Stand-by mode with minimized quiescent current
Transmitter supply VCC can be turned off in Stand-by Mode for additional quiescent current savings
Wake-up indication on the RxD output
Wide common mode range for electromagnetic immunity (EMI)
Excellent ESD robustness +/-8kV (HBM) and +/-11kV (IEC 61000-4-2)
Extended supply range on the VCC and VIO supply
CAN short circuit proof to ground, battery, VCC and VIO
TxD time-out function
Very low CAN bus leakage current in power-down state
Overtemperature protection
Protected against automotive transients according ISO 7637 and SAE J2962-2 standards
Green Product (RoHS compliant)
Small, leadless TSON8 package designed for automated optical inspection (AOI)
Potential applications
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Car powertrain and transmission applications
Gateway Modules
Body Control Modules (BCM)
Engine Control Unit (ECUs)
Datasheet
1
Rev. 1.0
2019-10-08
www.infineon.com/automotive-transceiver
High Speed CAN FD Transceiver
TLT9251VLE
Overview
Product validation
Qualified for automotive applications with higher temperature requirements as well as with extended lifetime
requirements. Product validation according to AEC-Q100.
Description
Type
Package
Marking
TLT9251VLE
PG-TSON-8
T9251V
The TLT9251VLE is the latest Infineon high-speed CAN transceiver generation, used inside HS CAN networks
for automotive and also for industrial applications. It is designed to fulfill the requirements of ISO 11898-2
(2016) physical layer specification and respectively also the SAE standards J1939 and J2284.
The TLT9251VLE is available in a small, leadless PG-TSON-8 package. The PG-TSON-8 package supports the
solder joint requirements for automated optical inspection (AOI)and is RoHS compliant and halogen free.
As an interface between the physical bus layer and the HS CAN protocol controller, the TLT9251VLE protects
the microcontroller against interferences generated inside the network. A very high ESD robustness and the
perfect RF immunity allows the use in automotive applications without adding additional protection devices,
like suppressor diodes for example.
While the transceiver TLT9251VLE is not supplied the bus is switched off and illustrates an ideal passive
behavior with the lowest possible load to all other subscribers of the HS CAN network.
Based on the high symmetry of the CANH and CANL output signals, the TLT9251VLE provides a very low level
of electromagnetic emission (EME) within a wide frequency range. The TLT9251VLE fulfills even stringent EMC
test limits without additional external circuit, like a common mode choke for example.
The perfect transmitter symmetry combined with the optimized delay symmetry of the receiver enables the
TLT9251VLE to support CAN FD data frames. Depending on the size of the network and the along coming
parasitic effects the device supports bit rates up to 5 MBit/s.
Dedicated low-power modes, like Stand-by mode provide very low quiescent currents while the device is
powered up. In Stand-by mode the typical quiescent current on VIO is below 10 µA while the device can still be
woken up by a bus signal on the HS CAN bus.
Fail-safe features like overtemperature protection, output current limitation or the TxD time-out feature
protect the TLT9251VLE and the external circuitry from irreparable damage.
Datasheet
2
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Table of contents
1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Potential applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Product validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
3
3.1
3.2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
General product characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Functional range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1
4.2
4.3
5
High-speed CAN functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.1
High-speed CAN physical layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6
Modes of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Normal-operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Forced-receive-only mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Stand-by mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Power-down state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.1
6.2
6.3
6.4
7
Changing the mode of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Power-up and power-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Mode change by the STB pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Mode changes by VCC undervoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Remote wake-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.1
7.2
7.3
7.4
8
Fail safe functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Short circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Unconnected logic pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
TxD time-out function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Delay time for mode change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.1
8.2
8.3
8.4
8.5
9
9.1
9.2
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Functional device characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
ESD robustness according to IEC61000-4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Application example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Voltage adaption to the microcontroller supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Further application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10.1
10.2
10.3
10.4
11
12
Package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Datasheet
3
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
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
GND
VCC/2
=
VIO
N.C.
Bus-biasing
GND
2
Figure 1
Functional block diagram
Datasheet
4
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Pin configuration
3
Pin configuration
3.1
Pin assignment
STB
CANH
CANL
1
8
TxD
GND
VCC
2
7
PAD
3
4
6
5
RxD
VIO
(Top-side x-ray view)
Figure 2
Pin configuration
3.2
Pin definitions
Table 1
Pin No.
1
Pin definitions and functions
Symbol
Function
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,
V
CC 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
CANL
CANH
STB
–
CAN Bus Low Level I/O;
“low” in dominant state.
7
CAN Bus High Level I/O;
“high” in dominant state.
8
Stand-by Input;
Internal pull-up to VIO, “low” for Normal-operating mode.
PAD
Connect to PCB heat sink area.
Do not connect to other potential than GND.
Datasheet
5
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
General product characteristics
4
General product characteristics
4.1
Absolute maximum ratings
Table 2
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
Digital supply voltage
VCC
-0.3
-0.3
-40
–
–
–
6.0
6.0
40
V
V
V
–
P_8.1.1
P_8.1.2
P_8.1.3
VIO
–
–
CANH and CANL DC voltage
versus GND
VCANH
Differential voltage between VCAN_Diff
CANH and CANL
-40
–
–
–
40
V
V
–
–
–
P_8.1.4
P_8.1.5
P_8.1.6
Voltages at the digital I/O pins: VMAX_IO1
STB, RxD, TxD
-0.3
-0.3
6.0
Voltages at the digital I/O pins: VMAX_IO2
VIO + 0.3 V
STB, RxD, TxD
Currents
RxD output current
Temperatures
IRxD
-5
–
5
mA
–
P_8.1.7
Junction temperature
Storage temperature
ESD Resistivity
Tj
-40
-55
–
–
160
150
°C
°C
–
–
P_8.1.8
P_8.1.9
TS
ESD immunity at CANH, CANL VESD_HBM_CAN -8
versus GND
–
–
–
8
kV
kV
V
HBM
P_8.1.11
P_8.1.12
P_8.1.13
(100 pF via 1.5 kΩ)2)
ESD immunity at all other pins VESD_HBM_ALL -2
2
HBM
(100 pF via 1.5 kΩ)2)
ESD immunity all pins
VESD_CDM
-750
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.
Datasheet
6
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
General product characteristics
4.2
Functional range
Table 3
Functional range
Parameter
Symbol
Values
Unit Note or
Test Condition
Number
Min. Typ. Max.
Supply Voltages
Transmitter supply voltage
Digital supply voltage
Thermal Parameters
Junction temperature
VCC
VIO
4.5
3.0
–
–
5.5
5.5
V
V
–
P_8.2.1
P_8.2.2
–
1)
Tj
-40
–
150
°C
P_8.2.3
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.
4.3
Thermal resistance
Note:
This thermal data was generated in accordance with JEDEC JESD51 standards. For more
information, please visit www.jedec.org.
Table 4
Thermal resistance1)
Parameter
Symbol
Values
Unit Note or
Test Condition
Number
Min. Typ. Max.
Thermal Resistances
2)
Junction to Ambient
PG-TSON-8
RthJA_TSON8
–
65
–
K/W
P_8.3.1
Thermal Shutdown (junction temperature)
Thermal shutdown temperature,
rising
TJSD
170
5
180
10
190
20
°C
K
temperature
falling: Min. 150°C
P_8.3.3
P_8.3.4
Thermal shutdown hysteresis
∆T
–
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
(TLT9251VLE) 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)
Datasheet
7
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
High-speed CAN functional description
5
High-speed CAN 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 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 TLT9251VLE is a high-speed CAN
transceiver with a dedicated bus wake-up function as defined in the latest ISO 11898-2 HS CAN standard.
5.1
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
Datasheet
8
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
High-speed CAN functional description
The TLT9251VLE 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 up to 5 MBit/s. The characteristic for a HS CAN network are the two signal states on the CAN bus:
dominant and recessive (see Figure 3).
The CANH and CANL pins are the interface to the CAN bus and both pins operate as an input and output. The
RxD and TxD pins are the interface to the microcontroller. The pin TxD is the serial data input from the CAN
controller, the RxD pin is the serial data output to the CAN controller. As shown in Figure 1, the HS CAN
transceiver TLT9251VLE includes a receiver and a transmitter unit, allowing the transceiver to send data to the
bus medium and monitor the data from the bus medium at the same time. The HS CAN transceiver
TLT9251VLE converts the serial data stream which is available on the transmit data input TxD, into a
differential output signal on the CAN bus, provided by the CANH and CANL pins. The receiver stage of the
TLT9251VLE monitors the data on the CAN bus and converts them to a serial, single-ended signal on the RxD
output pin. A logical “low” signal on the TxD pin creates a dominant signal on the CAN bus, followed by a
logical “low” signal on the RxD pin (see Figure 3). The feature, broadcasting data to the CAN bus and listening
to the data traffic on the CAN bus simultaneously is essential to support the bit-to-bit arbitration within CAN
networks.
The voltage levels for HS CAN transceivers are defined in ISO 11898-2. Whether a data bit is dominant or
recessive depends on the voltage difference between the CANH and CANL pins:
VDiff = VCANH - VCANL.
To transmit a dominant signal to the CAN bus the amplitude of the differential signal VDiff is higher than or
equal to 1.5 V. To receive a recessive signal from the CAN bus the amplitude of the differential VDiff is lower than
or equal to 0.5 V.
“Partially-supplied” high-speed CAN networks are those where the CAN bus nodes of one common network
have different power supply conditions. Some nodes are connected to the common power supply, while other
nodes are disconnected from the power supply and in power-down state. Regardless of whether the CAN bus
subscriber is supplied or not, each subscriber connected to the common bus media must not interfere in the
communication. The TLT9251VLE is designed to support “partially-supplied” networks. In power-down state,
the receiver input resistors are switched off and the transceiver input has a high resistance.
For permanently supplied ECU's, the HS CAN transceiver TLT9251VLE provides a Stand-by mode. In Stand-by
mode, the power consumption of the TLT9251VLE is optimized to a minimum, while the device is still able to
recognize wake-up patterns on the CAN bus and signal the wake-up event to the external microcontroller.
The voltage level on the digital input TxD and the digital output RxD is determined by the power supply level
at the VIO pin. Depending on the voltage level at the VIO pin, the signal levels on the logic pins (STB, TxD and
RxD) are compatible with microcontrollers having a 5 V or 3.3 V I/O supply. Usually the digital power supply VIO
of the transceiver is connected to the I/O power supply of the microcontroller (see Figure 18).
Datasheet
9
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Modes of operation
6
Modes of operation
The TLT9251VLE supports three different modes of operation (see Figure 4 and Table 5):
•
•
•
Normal-operating mode
Stand-by mode
Forced-receive-only mode
Mode changes are either triggered by the mode selection input pin STB or by an undervoltage event on the
transmitter supply VCC. Wake-up events on the HS CAN bus are indicated on the RxD output pin in Stand-by
mode, but no mode change is triggered by a wake-up event. An undervoltage event on the digital supply VIO
powers down the TLT9251VLE.
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”
Forced-
receive-only
mode
Power-down
state
VIO “on”
VCC “off”
STB “0”
STB VCC
VIO
STB VCC
VIO
“X”
“X”
“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 4
Mode state diagram
Modes of operation
Table 5
Mode
STB
VIO VCC Bus Bias Transmitter Normal-mode Low-power
Receiver
Receiver
Normal-operating
Forced-receive-only
Stand-by
“low” “on” “on” VCC/2
“low” “on” “off” GND
“high” “on” “X” GND
“on”
“off”
“off”
“on”
“off”
“on”
“off”
“off”
“on”
Power-down state
“X”
“off” “X” floating “off”
“off”
“off”
Datasheet
10
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Modes of operation
6.1
Normal-operating mode
In Normal-operating mode the transceiver TLT9251VLE sends and receives data from the HS CAN bus. All
functions are active (see also Figure 4 and Table 5):
•
The transmitter is active and drives the serial data stream on the TxD input pin to the bus pins CANH and
CANL.
•
The normal-mode receiver is active and converts the signals from the bus to a serial data stream on the RxD
output.
•
•
•
•
•
•
The low-power receiver is turned off.
The RxD output pin indicates the data received by the normal-mode receiver.
The bus biasing is connected to VCC/2.
The STB input pin is active and changes the mode of operation.
The TxD time-out function is enabled and disconnects the transmitter in case a time-out is detected.
The overtemperature protection is enabled and disconnects the transmitter in case an overtemperature is
detected.
•
The undervoltage detection on VCC is enabled and triggers a mode change to Forced-receive-only in case
an undervoltage event is detected.
•
The undervoltage detection on VIO is enabled and powers down the device in case of detection.
Normal-operating mode is entered from Stand-by mode and Forced-receive-only mode, when the STB input
pin is set to logical “low”.
Normal-operating mode can only be entered when all supplies are available:
•
•
The transmitter supply VCC is available (VCC > VCC(UV,R)).
The digital supply VIO is available (VIO > VIO(UV,R)).
6.2
Forced-receive-only mode
The Forced-receive-only mode is a fail-safe mode of the TLT9251VLE, which will be entered when the
transmitter supply VCC is not available and the STB pin is logical “low”. The following functions are available
(see also Figure 4 and Table 5):
•
•
•
•
•
•
•
•
•
•
•
The transmitter is disabled and the data available on the TxD input is blocked.
The normal-mode receiver is enabled.
The low-power receiver is turned off.
The RxD output pin indicates the data received by the normal-mode receiver.
The bus biasing is connected to GND.
The STB input pin is active and changes the mode of operation to Stand-by mode, if logical “high”.
The TxD time-out function is disabled.
The overtemperature protection is disabled.
The undervoltage detection on VCC is active.
The undervoltage detection on VIO is enabled and powers down the device in case of detection.
Forced-receive-only mode is entered from power-down state if the STB input pin is set to logical “low” and
the digital supply VIO is available (VIO > VIO(UV,R)).
•
Forced-receive-only mode is entered from Normal-operating mode by an undervoltage event on the
transmitter supply VCC
.
Datasheet
11
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Modes of operation
6.3
Stand-by mode
The Stand-by mode is the power save mode of the TLT9251VLE. In Stand-by mode most of the functions are
turned off and the TLT9251VLE is monitoring the bus for a valid wake-up pattern (WUP). The following
functions are available (see also Figure 4 and Table 5):
•
•
•
•
•
•
•
•
•
The transmitter is disabled and the data available on the TxD input is blocked.
The normal-mode receiver is disabled.
The low-power receiver is turned on and monitors the bus for a valid wake-up pattern (WUP).
The RxD output pin follows the Bus signal after WUP detection.
The bus biasing is connected to GND.
The STB input pin is active and changes the mode of operation.
The TxD time-out function is disabled.
The overtemperature protection is disabled.
The undervoltage detection on VCC is disabled. In Stand-by mode the device can operate without the
transmitter supply VCC
.
•
The undervoltage detection on VIO is enabled and powers down the device in case of detection.
The Stand-by mode can be entered from Normal-operating mode and Forced-receive-only mode by setting
the STB pin to logical “high”.
To enter Stand-by mode the digital supply VIO needs to be available (VIO > VCC(UV,R)).
6.4
Power-down state
Independent of the transmitter supply VCC and of the status at STB input pin the TLT9251VLE is powered down
if the supply voltage VIO < VIO(UV,F) (see Figure 4).
In the power-down state the differential input resistors of the receiver are switched off. The CANH and CANL
bus interface of the TLT9251VLE is floating and acts as a high-impedance input with a very small 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. In power-down state the transceiver is an invisible
node to the bus.
Datasheet
12
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Changing the mode of operation
7
Changing the mode of operation
7.1
Power-up and power-down
The HS CAN transceiver TLT9251VLE powers up by applying the digital supply VIO to the device (VIO > VIO(U,R)).
After powering up, the device enters one out of three operating modes (see Figure 5 and Figure 6).
Depending on the condition of the transmitter supply voltage VCC and the mode selection pin STB the device
can enter every mode of operation after the power-up:
•
•
•
V
V
CC is available and STB input is set to “low” - Normal-operating mode
CC is disabled and the STB input is set to “low” - Forced-receive-only mode
STB input is set to “high” - Stand-by mode
The device TLT9251VLE powers down when the VIO supply falls below the undervoltage detection threshold
(VIO < VIO(U,F)), regardless if the transmitter supply VCC is available or not. The power-down detection is active in
every mode of operation.
VIO “on”
Normal-operating
VCC “on”
mode
STB “0”
STB VCC
VIO
0
“on” “on”
VIO “off”
VIO “on”
VCC “off”
STB “0”
Forced-
receive-only
mode
power-down
state
STB VCC
VIO
STB VCC
VIO
VIO “off”
“X”
“X”
“off”
VIO “off”
0
“off” “on”
VIO “on”
STB “1”
Stand-by
mode
VIO “off”
“blue” -> indicates the event triggering the
power-up or power-down
“red” -> indicates the condition which is
required to reach a certain operating mode
STB VCC
VIO
1
“X”
“on”
Figure 5
Power-up and power-down
transmitter supply voltage VCC = “don’t care”
VIO
V
IO undervoltage monitor
VIO(UV,R)
tPOFF
hysteresis
VIO(UV,H)
V
IO undervoltage monitor
VIO(UV,F)
tPON
t
any mode of operation
Power-down state
“X” = don’t care
Stand-by mode
STB
"0" for Normal-operating mode
"1" for Stand-by mode
“high” due the internal
pull-up resistor1)
1) assuming no external signal applied
t
Figure 6
Power-up and power-down timings
Datasheet
13
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Changing the mode of operation
7.2
Mode change by the STB pin
When the TLT9251VLE is supplied with the digital voltage VIO the internal logic works and mode change by the
mode selection pin STB is possible.
By default the STB input pin is logical “high” due to the internal pull-up current source to VIO. Changing the STB
input pin to logical “low” in Stand-by mode triggers a mode change to Normal-operating mode (see Figure 7).
To enter Normal-operating mode the transmitter supply VCC needs to be available.
Stand-by mode can be entered from Normal-operating mode and Forced-receive-only mode by setting the
STB pin to logical “high”. While changing the mode of operation from Normal-operating mode or Forced-
receive-only mode to Stand-by mode, the transceiver TLT9251VLE turns off the transmitter and switches from
the normal-mode receiver to the low-power receiver. Entering Forced-receive-only mode from Stand-by
mode is not possible by the STB pin. The device remains in Stand-by mode independently of the VCC supply
voltage.
Normal-operating
mode
STB VCC
VIO
0
“on” “on”
VIO “on”
VCC “on”
STB “0”
Forced-
receive-only
mode
Power-down
state
STB VCC
“X” “X”
VIO
“off”
STB VCC
VIO
0
“off” “on”
VIO “on”
STB “1”
VIO “on”
STB “1”
Stand-by
mode
STB VCC
VIO
1
“X”
“on”
Figure 7
Mode selection by the STB pin
Datasheet
14
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Changing the mode of operation
7.3
Mode changes by VCC undervoltage
When the transmitter supply VCC (VCC < VCC(U/F)) is in undervoltage condition, the TLT9251VLE might not be able
to provide the correct bus levels on the CANH and CANL output pins. To avoid any interference with the
network the TLT9251VLE blocks the transmitter and changes the mode of operation when an undervoltage
event is detected (see Figure 8 and Figure 9).
In Normal-operating mode an undervoltage event on transmitter supply VCC (VCC < VCC(U/F)) triggers a mode
change to Forced-receive-only mode.
In Forced-receive-only mode the undervoltage detection VCC (VCC < VCC(U/F)) is enabled. In Stand-by mode the
undervoltage detection is disabled. In these modes the TLT9251VLE can operate without the transmitter
supply VCC
.
Normal-operating
mode
VIO “on”
VCC “on”
STB “0”
STB VCC
VIO
0
“on” “on”
VIO “on”
VCC “off”
STB “0”
Forced-
power-down
state
Receive-only
mode
STB VCC
“X” “X”
VIO
“off”
STB VCC
VIO
0
“off” “on”
Stand-by
mode
STB VCC
“X”
VIO
1
“on”
Figure 8
Mode changes by undervoltage events on VCC
digital supply voltage VIO = “on”
VCC
V
CC undervoltage monitor
VCC(UV,R)
tDelay(UV)_F
hysteresis
VCC(UV,H)
V
CC undervoltage monitor
VCC(UV,F)
tDelay(UV)_R
t
Normal-operating mode
Forced-receive only mode
Normal-operating mode
STB
t
Assuming the STB remains “low”, for example the STB pin is
connected to GND.
Figure 9
Undervoltage on the transmitter supply VCC
Datasheet
15
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Changing the mode of operation
7.4
Remote wake-up
The TLT9251VLE has a remote wake-up feature also called bus wake-up feature according to the ISO 11898-2
(2016). In Stand-by mode the low-power receiver monitors the activity on the CAN bus and in case it detects a
wake-up pattern it indicates the wake-up signal on the RxD output pin.
The low-power receiver is supplied by the digital supply VIO and therefore in Stand-by mode the transmitter
supply VCC can be turned off.
In Stand-by mode a wake-up event on the HS CAN is flagged on the RxD output pin (see Figure 11). The
transceiver remains in the currently selected mode of operation. No mode change is applied due to the wake-
up event (see Figure 10).
Stand-by
Indication on
mode
RxD if wake-
up pattern
detected
STB VCC
VIO
1
“X”
“on”
VIO “on”
STB “1”
Bus wake-up
pattern
Figure 10 Remote wake-up
A bus wake-up is triggered by a dedicated valid wake-up pattern. The defined wake-up pattern avoids any
false wake-up by spikes which might be on the HS CAN bus or by a permanent bus shortage.
The internal wake-up flag will be reset when:
•
•
A mode change to Normal-operating mode is applied during the wake-up pattern.
A power-down event occurs on the digital supply VIO.
Within the maximum wake-up time tWAKE, the wake-up pattern contents a dominant signal with the pulse
width tFilter, followed by a recessive signal with the pulse width tFilter and another dominant signal with the
pulse width tFilter (see Figure 11). The RxD output remains logical “high” as long no wake-up event has been
detected.
Datasheet
16
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Changing the mode of operation
t < tWake
VDiff
VDiff_LP_D
t > tFilter
t > tFilter
tWU
VDiff_LP_R
t > tFilter
t
t
VIO
RxD
30% of VIO
wake-up
detected
Figure 11 Remote wake-up signal
After a wake-up event has been detected the RxD output follows the CANH/CANL input pins. Dominant and
recessive signals are indicated on the RxD output as logical “high” and “low” with the delay of tWU as long their
pulse width exceeds the filter time tFilter (see also Figure 12).
VDiff
tWU
tWU
VDiff_LP_D
tWU
VDiff_LP_R
t
RxD
t
wake-up
detected
Figure 12 RxD signal after wake-up detection
Datasheet
17
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Fail safe functions
8
Fail safe functions
8.1
Short circuit protection
The CANH and CANL bus pins are proven to cope with a short circuit fault against GND and against the supply
voltages. A current limiting circuit protects the transceiver against damages. 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.
8.2
Unconnected logic pins
All logic input pins have an internal pull-up current source to VIO. In case the VIO and VCC supply is activated and
the logical pins are open, the TLT9251VLE enters into the Stand-by mode by default.
8.3
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 TLT9251VLE disables the transmitter (see Figure 13). The receiver is still active and the data
on the bus continues to be monitored by the RxD output pin.
TxD
t
t > tTxD
TxD time–out released
TxD time-out
CANH
CANL
t
t
RxD
Figure 13 TxD time-out function
Figure 13 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 TLT9251VLE requires a signal change on the TxD input pin from logical “low”
to logical “high”.
8.4
Overtemperature protection
The TLT9251VLE has an integrated overtemperature detection to protect the TLT9251VLE against thermal
overstress of the transmitter. The overtemperature protection is only active in Normal-operating mode. In
Datasheet
18
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Fail safe functions
case of an overtemperature condition, the temperature sensor will disable the transmitter while the
transceiver remains in Normal-operating mode. After the device has cooled down the transmitter is activated
again (see Figure 14). A hysteresis is implemented within the temperature sensor.
TJSD (shut down temperature)
cool down
TJ
ΔT
switch-on transmitter
t
t
CANH
CANL
TxD
t
t
RxD
Figure 14 Overtemperature proctection
8.5
Delay time for mode change
The HS CAN transceiver TLT9251VLE changes the mode of operation within the time window tMode. During the
mode change from Stand-by mode to non-low power mode the RxD output pin is permanently set to logical
“high” and does not reflect the status on the CANH and CANL input pins.
After the mode change is completed, the transceiver TLT9251VLE releases the RxD output pin.
Datasheet
19
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Electrical characteristics
9
Electrical characteristics
The electrical characteristics are specified in the defined temperature range. Beyond this temperature range
and below the absolute maximum rating the TLT9251VLE operates as described in the circuit description,
parameter deviation is possible.
9.1
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
Normal-operating,
recessive state
ICC_R
ICC_D
IIO
–
–
–
2
4
mA VTxD = VIO;
STB = 0 V;
P_9.1.1
P_9.1.2
P_9.1.3
V
Current consumption at VCC
Normal-operating mode,
dominant state
38
–
48
1.5
mA VTxD = VSTB = 0 V;
Current consumption at VIO
mA VSTB = 0 V;
Normal-operating mode
VDiff = 0 V;
VTxD = VIO;
Current consumption at VCC
Stand-by mode
ICC(STB)
IIO(STB)
–
–
–
–
7
–
5
µA
µA
µA
VTxD = VSTB = VIO;
P_9.1.4
P_9.1.5
P_9.1.6
Current consumption at VIO
Stand-by mode
15
12
VTxD = VSTB = VIO;
0 V < VCC < 5.5 V;
1)
Current consumption at VIO
IIO(STB)_85
V
= VSTB = VIO;
TxD
Stand-by mode
TJ < 85°C;
0 V < VCC < 5.5 V;
Current consumption at VCC
Forced-receive-only mode
ICC(FROM)
–
–
–
1
mA VTxD = VSTB = 0 V;
0 V < VCC < VCC(UV,F)
P_9.1.10
P_9.1.11
;
;
VDiff = 0 V;
Current consumption at VIO
Forced-receive-only mode
IIO(FROM)
0.8
1.5
mA VTxD = VSTB = 0 V;
0 V < VCC < VCC(UV,F)
VDiff = 0 V;
Supply resets
VCC undervoltage monitor
rising edge
VCC(UV,R)
VCC(UV,F)
VCC(UV,H)
VIO(UV,R)
3.8
3.8
–
4.35 4.5
4.25 4.5
V
–
P_9.1.12
P_9.1.13
P_9.1.14
P_9.1.15
VCC undervoltage monitor
falling edge
V
–
1)
VCC undervoltage monitor
hysteresis
100
–
mV
V
VIO undervoltage monitor
2.0
2.55 3.0
–
rising edge
Datasheet
20
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
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.
VIO undervoltage monitor
falling edge
VIO(UV,F)
VIO(UV,H)
2.0
2.4
150
–
3.0
V
–
P_9.1.16
P_9.1.17
P_9.1.18
1)
VIO undervoltage monitor
hysteresis
–
–
mV
µs
VCC undervoltage delay time
tDelay(UV)_F
tDelay(UV)_R
–
30
100
1) (see Figure 9);
VIO delay time power-up
VIO delay time power-down
Receiver output RxD
tPON
–
–
–
–
280
100
µs
µs
1) (see Figure 6);
1) (see Figure 6);
P_9.1.19
P_9.1.20
tPOFF
“High” level output current
IRxD,H
IRxD,L
–
1
-4
4
-1
–
mA VRxD = VIO - 0.4 V;
Diff < 0.5 V;
mA VRxD = 0.4 V;
Diff > 0.9 V;
P_9.1.21
P_9.1.22
V
“Low” level output current
V
Transmission input TxD
“High” level input voltage
threshold
VTxD,H
VTxD,L
–
0.5
0.7
V
V
recessive state;
dominant state;
P_9.1.26
P_9.1.27
× VIO × VIO
“Low” level input voltage
threshold
0.3
× VIO × VIO
0.4
–
1)
Input hysteresis
VHYS(TxD)
ITxD,H
ITxD,L
CTxD
–
200
–
–
mV
µA
µA
pF
P_9.1.28
P_9.1.29
P_9.1.30
P_9.1.31
P_9.1.32
“High” level input current
“Low” level input current
Input capacitance
-2
-200
–
2
VTxD = VIO;
–
-20
10
4
VTxD = 0 V;
1)
–
TxD permanent dominant
time-out, optional
tTxD
1
–
ms
Normal-operating
mode;
stand-by input STB
“High” level input voltage
threshold
VSTB,H
VSTB,L
–
0.5
0.7
V
V
Stand-by mode;
P_9.1.36
P_9.1.37
× VIO × VIO
“Low” level input voltage
threshold
0.3
× VIO × VIO
0.4
–
Normal-operating
mode;
“High” level input current
“Low” level input current
Input hysteresis
ISTB,H
-2
–
2
µA
µA
mV
pF
VSTB = VIO;
P_9.1.38
P_9.1.39
P_9.1.42
P_9.1.43
ISTB,L
-200
–
–
-20
–
VSTB = 0 V;
1)
VHYS(STB)
C(STB)
200
–
1)
Input capacitance
Bus receiver
–
10
Differential range dominant
Normal-operating mode
VDiff_D_Range 0.9
–
8.0
V
-12 V ≤ VCMR ≤ 12 V;
P_9.1.46
Datasheet
21
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
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.
Differential range recessive
Normal-operating mode
VDiff_R_Range -3.0
–
0.5
V
-12 V ≤ VCMR ≤ 12 V;
P_9.1.48
P_9.1.49
P_9.1.50
1)
Differential receiver hysteresis VDiff,hys
Normal-operating mode
30
–
mV
V
Differential range threshold
dominant
Stand-by mode
VDiff_D_STB_R 1.15
8.0
0.4
-12 V ≤ VCMR ≤ 12 V;
ange
Differential range recessive
Stand-by mode
VDiff_R_STB_R -3.0
–
V
-12 V ≤ VCMR ≤ 12 V;
P_9.1.51
ange
Common mode range
CMR
-12
6
–
–
12
50
V
–
P_9.1.52
P_9.1.53
Single ended internal
resistance
RCAN_H
RCAN_L
,
kΩ
recessive state;
-2 V ≤ VCANH ≤ 7 V;
-2 V ≤ VCANL ≤ 7 V;
Differential internal resistance RDiff
12
–
100
kΩ
recessive state;
-2 V ≤ VCANH ≤ 7 V;
-2 V ≤ VCANL ≤ 7 V;
P_9.1.54
Input resistance deviation
between CANH and CANL
∆Ri
-3
–
–
3
%
1) recessive state;
VCANH = VCANL = 5 V;
2) recessive state
P_9.1.55
P_9.1.56
P_9.1.57
Input capacitance CANH,
CANL versus GND
CIn
20
10
40
20
pF
pF
Differential input capacitance CInDiff
–
2) recessive state
Bus transmitter
CANL, CANH recessive
output voltage
Normal-operating mode
VCANL,H
2.0
-50
0.5
2.75
1.5
2.5
–
3.0
50
V
VTxD = VIO;
no load;
P_9.1.58
P_9.1.59
P_9.1.60
P_9.1.61
P_9.1.62
P_9.1.63
CANH, CANL recessive
output voltage difference
Normal-operating mode
VDiff_R_NM
=
mV VTxD = VIO;
VCANH
VCANL
-
no load;
CANL dominant
output voltage
Normal-operating mode
VCANL
–
2.25
4.5
2.5
3.3
V
V
V
V
VTxD = 0 V;
50 Ω < RL < 65 Ω;
4.75 V < VCC < 5.25 V;
CANH dominant
output voltage
Normal-operating mode
VCANH
–
VTxD = 0 V;
50 Ω < RL < 65 Ω;
4.75 V < VCC < 5.25 V;
Differential voltage dominant VDiff_D_NM
Normal-operating mode
VDiff = VCANH - VCANL
2.0
2.0
VTxD = 0 V;
50 Ω < RL < 65 Ω;
4.75 V < VCC < 5.25 V;
Differential voltage dominant VDiff_EXT_BL 1.4
extended bus load
Normal-operating mode
VTxD = 0 V;
45 Ω < RL < 70 Ω;
4.75 V < VCC < 5.25 V;
Datasheet
22
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
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.
Differential voltage dominant VDiff_HEXT_BL 1.5
high extended bus load
–
5.0
V
VTxD = 0 V;
RL = 2240 Ω;
P_9.1.64
Normal-operating mode
4.75 V < VCC < 5.25 V;
static behavior;1)
CANH, CANL recessive
output voltage difference
Stand-by mode
VDiff_STB
-0.2
-0.1
–
–
0.2
0.1
V
V
V
no load;
P_9.1.65
P_9.1.66
CANL, CANH recessive
output voltage
Stand-by mode
VCANL,H
no load;
Driver symmetry
VSYM
0.9 × 1.0 × 1.1 ×
VCC
1) 3) C1 = 4.7 nF;
P_9.1.67
P_9.1.68
(VSYM = VCANH + VCANL
)
VCC
VCC
CANL short circuit current
CANH short circuit current
Leakage current, CANH
Leakage current, CANL
ICANLsc
40
75
115
mA VCANLshort = 18 V;
t < tTxD
;
VTxD = 0 V;
ICANHsc
-115 -75
-40
5
mA VCANHshort = -3 V;
P_9.1.70
P_9.1.71
P_9.1.72
P_9.1.190
t < tTxD
;
VTxD = 0 V;
ICANH,lk
-5
-5
–
–
–
–
µA
µA
VCC = VIO = 0 V;
0 V < VCANH ≤ 5 V;
VCANH = VCANL;
ICANL,lk
5
VCC = VIO = 0 V;
0 V < VCANL ≤ 5 V;
VCANH = VCANL
;
CANH, CANL output voltage
difference slope, recessive to
dominant
Vdiff_slope_rd
70
V/µs 1) 30 % to 70 % of
measured differential
bus voltage;
C2 = 100 pF; RL = 60 Ω;
4.75 V < VCC < 5.25 V;
CANH, CANL output voltage
difference slope, dominant to
recessive
Vdiff_slope_dr
–
–
–
70
V/µs 1) 70 % to 30 % of
measured differential
bus voltage;
P_9.1.191
P_9.1.73
C2 = 100 pF; RL = 60 Ω;
4.75 V < VCC < 5.25 V;
Dynamic CAN-transceiver characteristics
Propagation delay
TxD-to-RxD
tLoop
80
215
ns
C1 = 0 pF;
C2 = 100 pF;
CRxD = 15 pF;
(see Figure 16)
Datasheet
23
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
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.
Propagation delay
increased load
TxD-to-RxD
tLoop_150
80
–
330
ns
1)C1 = 0 pF;
C2 = 100 pF;
RxD = 15 pF;
P_9.1.74
C
RL = 150 Ω;
Delay Times
1)
Delay time for mode change tMode
–
–
–
–
–
20
1.8
10
5
µs
µs
ms
µs
P_9.1.79
P_9.1.81
P_9.1.82
P_9.1.83
CAN activity filter time
Bus wake-up time-out
Bus wake-up delay time
CAN FD characteristics
tFilter
tWake
tWU
0.5
0.8
–
1) (see Figure 11);
1) (see Figure 11);
(see Figure 11);
Received recessive bit width tBit(RxD)_2M 400
at 2 MBit/s
500
200
500
200
–
550
220
530
210
40
ns
ns
ns
ns
ns
ns
C2 = 100 pF;
CRxD = 15 pF;
P_9.1.84
P_9.1.85
P_9.1.86
P_9.1.87
P_9.1.88
P_9.1.89
tBit = 500 ns;
(see Figure 17);
Received recessive bit width tBit(RxD)_5M 120
at 5 MBit/s
C2 = 100 pF;
CRxD = 15 pF;
tBit = 200 ns;
(see Figure 17);
Transmitted recessive bit
width at 2 MBit/s
tBit(Bus)_2M 435
C2 = 100 pF;
CRxD = 15 pF;
tBit = 500 ns;
(see Figure 17);
Transmitted recessive bit
width at 5 MBit/s
tBit(Bus)_5M 155
C2 = 100 pF;
CRxD = 15 pF;
tBit = 200 ns;
(see Figure 17);
Receiver timing symmetry at ∆tRec_2M
2 MBit/s
∆tRec_2M = tBit(RxD)_2M - tBit(Bus)_2M
-65
-45
C2 = 100 pF;
CRxD = 15 pF;
tBit = 500 ns;
(see Figure 17);
Receiver timing symmetry at ∆tRec_5M
5 MBit/s
–
15
C2 = 100 pF;
CRxD = 15 pF;
∆tRec_5M = tBit(RxD)_5M - tBit(Bus)_5M
tBit = 200 ns;
(see Figure 17);
1) Not subject to production test, specified by design
2) Not subject to production test, specified by design, S2P-Method; f = 10 MHz
3) VSYM shall be observed during dominant and recessive state and also during the transition from dominant to
recessive and vice versa, while TxD is stimulated by a square wave signal with a frequency of 1 MHz.
Datasheet
24
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Electrical characteristics
9.2
Diagrams
5
VIO
100 nF
7
6
CANH
1
8
TxD
STB
RL/2
C2
TLT9251V
C1
4
3
RxD
VCC
RL/2
CRxD
CANL
GND
2
100 nF
Figure 15 Test circuit for dynamic characteristics
TxD
0.7 x VIO
0.3 x VIO
t
t
VDiff
tLoop(H,L)
tLoop(L,H)
RxD
0.7 x VIO
0.3 x VIO
t
Figure 16 Timing diagrams for dynamic 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 17 Recessive bit time for five dominant bits followed by one recessive bit
Datasheet
25
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Application information
10
Application information
10.1
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
Performed Test
Result
Unit
kV
Remarks
Electrostatic discharge voltage at pin CANH and CANL versus GND ≥ +11
Electrostatic discharge voltage at pin CANH and CANL versus GND ≤ -11
1)Positive pulse
1)Negative pulse
kV
1) Not subject to production test. ESD susceptibility “ESD GUN” according to GIFT / ICT paper: “EMC Evaluation of CAN
Transceivers, version IEC TS62228”, section 4.3. (DIN EN61000-4-2)
Tested by external test facility (IBEE Zwickau)
10.2
Application example
VBAT
I
Q1
Q2
22 μF
TLE4476D
GND
100 nF
CANH
CANL
EN
100 nF
3
VCC
100 nF
VIO
22 μF
5
8
1
4
120
Ohm
TLT9251V
VCC
Out
Out
In
STB
TxD
RxD
7
6
CANH
CANL
Microcontroller
e.g. XC22xx
GND
GND
2
I
Q1
22 μF
TLE4476D
GND
100 nF
EN
Q2
3
VCC
100 nF
VIO
100 nF
22 μF
5
8
1
4
TLT9251V
VCC
Out
Out
In
STB
TxD
RxD
7
6
CANH
CANL
Microcontroller
e.g. XC22xx
GND
120
Ohm
GND
2
example ECU design
CANH
CANL
Figure 18 Application circuit
Datasheet
26
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Application information
10.3
Voltage adaption to the microcontroller supply
To adapt the digital input and output levels of the TLT9251VLE to the I/O levels of the microcontroller, connect
the power supply pin VIO to the microcontroller voltage supply (see Figure 18).
Note:
In case no dedicated digital supply voltage VIO is required in the application, connect the digital
supply voltage VIO to the transmitter supply VCC
.
10.4
Further application information
•
For further information you may visit: http://www.infineon.com/automotive-transceiver
Datasheet
27
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Package outline
11
Package outline
Figure 19 PG-TSON-8 (Plastic Thin Small Outline Nonleaded)
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
Datasheet
28
Rev. 1.0
2019-10-08
High Speed CAN FD Transceiver
TLT9251VLE
Revision history
12
Revision history
Revision
Date
Changes
1.0
2019-10-08 Initial datasheet
Datasheet
29
Rev. 1.0
2019-10-08
Trademarks
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Edition 2019-10-08
Published by
Infineon Technologies AG
81726 Munich, Germany
event be regarded as a guarantee of conditions or and conditions and prices, please contact the nearest
characteristics ("Beschaffenheitsgarantie").
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With respect to any examples, hints or any typical
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hereby disclaims any and all warranties and liabilities
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