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TLE8457
LIN Transceiver with integrated Voltage Regulator
1 Overview
Features
• Single-wire LIN transceiver for transmission rates up to 20 kBit/s
• Compliant to ISO 17987-4, LIN specification 2.2A and SAE J2602
• 5 V or 3.3 V Low Drop-Out Linear Voltage Regulator with 70 mA current capability
• Stable with ceramic output capacitor of 1 µF
• Ultra low current consumption in Sleep Mode of max. 16µA
• Ultra low current consumption in Standby Mode: typical 20 µA
• Very low leakage current on the BUS pin
• V
CC
undervoltage detection with RESET output
• TxD protected with dominant time-out function and state check after mode change to Normal Operation Mode
• Initialization watchdog with automatic transition to Sleep Mode
• BUS short to V
BAT
protection and BUS short to GND handling
• Over-temperature protection and supply undervoltage detection
• Very high ESD robustness; ±8kV according to IEC61000-4-2
• Optimized for high Electromagnetic Compatibility (EMC);
Very low emission and high immunity to interference
• Available in standard PG-DSO-8 and leadless PG-TSON-8 packages
• PG-TSON-8 package supports Automated Optical Inspection (AOI)
• Green Product (RoHS compliant)
• AEC Qualified
Applications
• LIN slave satellite modules
• Window lifters
• Rain/light sensors
• Sun roof control modules
• Wiper modules
• Ambient lighting
Data Sheet
www.infineon.com/transceivers
1 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Overview
Description
The TLE8457 is a monolithic integrated LIN transceiver and Low Drop-Out voltage regulator. The device is designed to supply a microcontroller and peripherals with up to 70mA, provide protection through V
CC undervoltage reset, while also offering bi-directional bus communication compliant to LIN Specification 2.2A
and SAE J2602. With the ultra low quiescent current consumption of typical 20 µA in Standby Mode the
TLE8457 is especially suited for applications that are permanently supplied by the battery.
Based on the Infineon BiCMOS technology the TLE8457 provides excellent ESD robustness together with a very high level of electromagnetic compatibility (EMC). The TLE8457 is AEC qualified and tailored to withstand the harsh conditions of the automotive environment.
Type
TLE8457ASJ
TLE8457ALE
TLE8457BSJ
TLE8457BLE
LDO V
CC
Output Voltage Package
5 V PG-DSO-8
5 V
3.3 V
3.3 V
PG-TSON-8
PG-DSO-8
PG-TSON-8
Marking
8457A
8457A
8457B
8457B
Data Sheet 2 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Table of Contents
S
Undervoltage Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Data Sheet 3 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Block Diagram
2 Block Diagram
V
S
1
Linear Regulator
Bandgap
Reference
Current Limitation
Control
Supply Monitor
R
slave
BUS
4
Wake
Receiver
Over-Temperature and Over-Current
Protection
Transmitter
Driver
V
CC
Undervoltage
Detection
Control
Driver
Time-Out
GND
3
Receiver
BUS
V
S
/
2
RF-
Filter
8
V
CC
R
NRST
V
CC
7
NRST
R
EN
V
CC
2
EN
R
TxD
V
CC
6
TxD
5
RxD
TLE8457_BLOCK_DIAGRAM
Figure 1 Block diagram
Data Sheet 4 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Pin Configuration
3 Pin Configuration
3.1
Pin Assignment
V
S
EN
1
2
GND
BUS
3
4
PG-DSO-8
Figure 2 Pin configuration
6
5
8
7
V
CC
NRST
TxD
RxD
V
EN
GND
BUS
S
3
4
1
2
(PAD)
PG-TSON-8
(Top side X-Ray view)
8
7
V
CC
NRST
TxD
6
5
RxD
TLE8457_PINNING
3
4
5
3.2
Pin
1
2
6
7
8
PAD
Symbol
V
S
EN
GND
BUS
RxD
TxD
V
CC
–
Pin Definitions and Functions
NRST
Function
Battery Supply Voltage;
Decoupling capacitor required
Enable Input;
Integrated pull-down resistor
Logical “high” to select Normal Operation Mode
Ground
BUS Input / Output;
Integrated LIN Slave Termination
Receive Data Output;
Monitors the LIN bus signal in Normal Operation Mode
Indicates a wake-up event in Init Mode
Transmit Data Input;
Integrated pull-up resistor
Logical “low” to drive a dominant signal on the LIN bus
Undervoltage Reset Output;
Integrated pull-up resistor
Logical “low” during Reset
Voltage Regulator Output;
Output capacitor requirements specified in Functional Device Characteristics
Connect to PCB heat sink area. Do not connect to other potential than GND
Data Sheet 5 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
4 Functional Description
4.1
Operating Modes
The operation mode of the TLE8457 is controlled with the EN and TxD input pins (see
Figure 3
Table 2
The TLE8457 has 3 major operation modes:
• Normal Operation Mode
• Standby Mode
• Sleep Mode
Additionally the TLE8457 has an Init Mode that is automatically entered when powering up, detecting wakeup events or in case of malfunctions.
Power-up
Recovery from overtemperature event on voltage regulator
Standby Mode
LIN transceiver: Off
LDO regulator: On
EN: Low
NRST: High
11
BU
S W ake-up
1
13
9
10
Normal Operation Mode
LIN transceiver: On
LDO regulator: On
EN: High
NRST: High
12
V
CC
under voltage
4
2
EN
V
CC
under volt ag e
3
Init Mode
LIN transceiver: Off
LDO regulator: On
EN: Low
RxD: Wake-up source
1)
NRST: High
2)
7
BUS Wake-up
EN
AND
TxD
EN
8
Initializ
BU
S W ak e-up ation W atchdog
5
6
Sleep Mode
LIN transceiver: Off
LDO regulator: Off
EN: Low
NRST: Low
1) Wake-up Source
:
RxD: logical „high“ after Power-up or Reset
RxD: logical „low“ after BUS Wake-up detection
2)
Reset:
NRST will stay „low“ during LDO failures and for the Reset time
t
RST
Figure 3 Operation mode state diagram
TLE8457_MODE_DIAGRAM
Data Sheet 6 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
Table 1 Operation mode transitions
No. Reason for transition Comment
1
2
Power-on detection
Mode change with EN input
The V
S
supply voltage rise above the V
S,PON
power-on reset level
Triggered by logical “high” level
3
V
CC
undervoltage detection
V
CC output voltage fall below the reset threshold level
4 Mode change with EN and TxD inputs Triggered by logical “low” level on EN and TxD
5
6
Mode change with EN input
Bus wake-up detection
12 V
CC
undervoltage detection
Triggered by logical “high” level
RxD set “low” for signalling the bus wake-up event to the microcontroller
7 Bus wake-up detection RxD set “low” for signalling the bus wake-up event to the microcontroller
8 Initialization watchdog timer elapsed
Forced transition to Sleep Mode because of no response from microcontroller after power-on, wake-up, reset or if local errors are preventing V
CC
to power up
9 Mode change with EN and TxD inputs Triggered by logical “low” level on EN while TxD is held “high”
10 Mode change with EN input
11 Bus wake-up detection
Triggered by logical “high” level
RxD set “low” for signalling the bus wake-up event to the microcontroller
Detection of failure due to V
CC over-temperature event
undervoltage or recovery from an
13 Recovery from LDO overtemperature event
When over-temperature on the LDO is detected the TLE8457 is disabled. After recover the device is activated in Init Mode
Table 2
Mode
Operating Mode Control
Control Functionality Comments
Sleep
Init
EN
Low
Low
TxD
Low
High
1)
V
CC
Off
On
NRST
Low
High
2)
RxD
Floating –
Low
High
High
RxD “low” after a bus wake-up
RxD “high” after power-up or reset
– Standby Low
On High
Normal
Operation
High Low
High
On High Low
High
RxD reflects the signal on the bus
TxD driven by the microcontroller
1) The TxD input has a pull-up structure to V
CC
2) NRST is logical “low” during V
CC
and is default set to logical “high” if left open.
undervoltage and while issuing a reset pulse to the microcontroller.
Data Sheet 7 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
4.1.1
Normal Operation Mode
In Normal Operation Mode both the voltage regulator and the LIN transceiver are active. The TLE8457 supports data transmission rates up to 20 kBit/s: Data from the microcontroller is transmitted to the LIN bus via the TxD input, while the receiver detects the data stream on the LIN bus and forwards it to the RxD output.
After entering Normal Operation Mode the TLE8457 requires a logical “high” signal for the time t to,rec
on the
TxD input before releasing the data communication; The transmitter remains deactivated as long as the signal on the TxD input pin remains logical “low”, preventing possible bus communication disturbance (see
Figure 4
).
From Normal Operation Mode the TLE8457 can be set to Standby Mode or Sleep Mode.
EN
t
MODE,HIGH
t
MODE,LOW t
V
CC t
NRST t
RxD
Data transmission
t
to,rec t
TxD Data transmission
Standby mode Normal Operation mode t
Sleep mode
TLE8457_NORMAL_MODE
Figure 4 Entering Normal Operation Mode, transition to Sleep Mode
4.1.2
Standby Mode
Standby Mode is a low power mode with ultra low quiescent current consumption while the voltage regulator remains active, supplying for example a microcontroller in Stop mode. No LIN bus communication is possible, the transmitter and the receiver are disabled. The low power receiver is still active and the device can wakeup by a message on the LIN bus.
For changing the operation mode change from Standby Mode to Sleep Mode, the device has first to be set in
Normal Operation Mode, then in Sleep Mode (see
Figure 4
).
Data Sheet 8 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
4.1.3
Init Mode
After a power-up event the TLE8457 enters Init Mode by default. In this mode the LIN transceiver is disabled, but the voltage regulator is switched on. Following the linear voltage regulator has reached its nominal output voltage V
CC
and the NRST output set “high”, the external microcontroller can change the mode to Normal
Operation Mode. If the Initialization Watchdog timer elapses before a “high” signal is detected on the EN input,
the TLE8457 will autonomously transition to Sleep Mode (see
“Initialization Watchdog” on Page 15
Initialization Watchdog protection in Init Mode is always activated after starting up the voltage regulator and after a reset pulse, triggered by the NRST output going “high”.
In Init Mode the TLE8457 indicates wake-up information on the RxD output. After a power-up and reset event, the RxD output will be “high”. If the TLE8457 is in Init Mode after BUS wake-up detection, the RxD output will be “low”.
Transitions to Init Mode can be controlled with the EN input when in Sleep Mode, or automatic forced after:
• Bus wake-up event on the BUS pin.
• Power-up event on the supply V
S
.
• Power-on reset caused by the supply V
S
.
• Voltage regulator failure event due to V
S
undervoltage.
• Recovery of an over-temperature event on the voltage regulator.
V
S
V
S,PON t
LIN
t
WK,bus t
V
CC t
NRST t
RxD
RxD signals Power-up RxD signals Bus Wake-up
EN
The device remains in Init mode while the signal on the EN pin is „low“
Init mode Un-powered
Figure 5 Entering Init Mode after power-up
Data Sheet 9 t t
Normal Operation mode
TLE8457_INIT_MODE
Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
4.1.4
Sleep Mode
Sleep Mode is a low power mode with quiescent current consumption reduced to a minimum while the device can still wake-up by a message on the LIN bus. Both the transceiver and the voltage regulator are switched off.
4.1.5
Bus Wake-up event
A bus wake-up event, also called remote wake-up, causes a transition from a low power mode to Init Mode. A falling edge on the LIN bus, followed by a dominant bus signal for the time t
WK,bus results in a bus wake-up event. The mode change to Init Mode becomes active with the following rising edge on the LIN bus, when bus voltage exceeds V wake-up event.
BUS,wk
. The TLE8457 remains in low power mode until it detects a state change on the LIN bus from dominant to recessive (see
Figure 6
). In Init Mode a logical “low” signal on the RxD output indicates a bus
In case the TLE8457 detects a bus wake-up event while already being in Init, the wake-up event will be signalled with a logical “low” level on RxD and override the previous wake source (see
Figure 5
V
BUS
V
BUS,dom
t
WK,bus
Sleep mode
V
CC
NRST
EN
TxD
RxD
Figure 6 Bus wake-up behavior
Data Sheet 10
V
BUS,wk
Init mode
V
CC,UV,ON
t
RST
TxD is „high“ because of internal pull-up structure
RxD „low“ indicates a Bus
Wake-up event
TLE8457_BUS_WAKE t t t t t t
Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
4.1.6
Mode Transition via EN pin
The EN input is used for operation mode control of the TLE8457. By setting the EN input logical “high” for the time t
MODE,HIGH triggered.
while being in Init Mode or Standby Mode, a transition to Normal Operation Mode will be
If the voltage level at the EN input is set logical “high” while the TLE8457 is in Sleep Mode, a transition to Init
Mode is initiated. If the EN input is continuously held “high” though powering up the voltage regulator and the following reset pulse, Normal Operation Mode will be entered.
From Normal Operation Mode the TLE8457 can be set to either Sleep Mode or Standby Mode. If the EN input is set “low” for the time t
MODE,LOW
while the TxD input is held logical “high”, the mode will change to Standby
Mode. For a transition to Sleep Mode, the TxD must be set logical “low” before the time t
MODE,LOW is set “low”, for preventing driving the bus dominant though mode transition to Sleep Mode.
elapses after
Figure 7
). It is recommended to program a short delay time from EN is set “low” until TxD
The EN input has an integrated pull-down resistor to ensure the device remains in a low power mode if the EN input is left open. The EN input has an integrated hysteresis (see
Figure 7
The TLE8457 changes the operation modes regardless of the signal on the BUS pin. In the case of a short circuit failure between the LIN bus and GND, resulting in a permanent dominant signal, the TLE8457 can be set to
Sleep Mode.
EN
t
MODE,LOW
t
MODE,HIGH
V
EN,OFF
V
EN,ON
t
MODE,LOW
t
MODE,HIGH
EN hysteresis t
TxD t
t
RST
NRST
Normal Operation mode
Standby mode
Normal Operation mode
Sleep mode Init mode
Normal Operation mode t
TLE8457_MODE_CONTROL
Figure 7 Operation mode control
The EN input is blocked while the TLE8457 is in Init Mode and NRST is “low”, no mode transitions to Normal
Operation Mode is possible while a reset pulse is issued. After the NRST output goes “high”, mode control with the EN input is released. At the same time the Initialization Watchdog timer starts (see
“Initialization
Watchdog” on Page 15
Note: If the TLE8457 is being forced to Sleep Mode by the Initialization Watchdog while the EN input is externally being held at a logical “high” level, the device will reinitiate Init Mode after the VCC voltage has been discharged below ~1 V. In such applications additional supervision means are recommended.
Data Sheet 11 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
4.2
Power Supplies
The TLE8457 is designed for being supplied by the battery line through an external reverse polarity protection diode at the V
S
pin (see
Figure 18
). An input capacitor is needed for damping input line transients.
4.2.1
Power-Up / Power-Down
During power-up the TLE8457 will enter Init Mode when the V
The voltage regulator output V
V
CC the reset time t
RST
CC
will track the V
reaches the under-voltage level V
CC,UVC
S
S
supply reaches the power-on reset level V
supply voltage until V
TLE8457 can change operating mode accordingly (see
Table 2
CC
S,PON
reaches its nominal voltage level. As
, a reset pulse is issued, the NRST output will stay logical “low” for
and then be set logical “high”. As NRST goes “high”, the EN input will become active and the
.
V
S
V
S,UV,ON
V
S,UV,OFF
V
CC
V
S
V
CC,UV
V
CC,UV
V
CC
V
S,PON
V
S,PON t
NRST
t
RST t
EN un-powered Init mode Normal Operation mode
Figure 8 Power-up and power-down behavior
Transmission blocked
Init mode t un-powered
TLE8457_VS_POWER-UP_DOWN
While powering down the TLE8457 will block the LIN transmitter if being in Normal Operation Mode as the V
S supply voltage falls below V below V
CC
+ V
DR
. As V
CC
S,UV,OFF
. The voltage regulator will start tracking the V
S
falls below the undervoltage level V
CC,UV the TLE8457 will enter Init Mode. When the V
S voltage regulator will be disabled and the TLE8457 considered un-powered.
supply voltage when falling
the NRST output will be set logical “low” and
supply voltage falls below the power-on-reset level V
S,PON
the
Data Sheet 12 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
4.2.2
V
S
Undervoltage Detection
V
S
Undervoltage blocking level
V
S,UV,OFF
Undervoltage hysteresis
V
S,UV,hys
Undervoltage release level
V
S,UV,ON
Normal Operation mode No communication possible
Power-on reset level
V
S,PON
Blanking time
t
blank,UV
Normal Operation mode
TLE8457_VS_EARLY_UNDERVOLTAGE_A t
Figure 9 V
S
early undervoltage detection
The TLE8457 has an undervoltage detection on the supply pin V
S
with two different thresholds:
• In Normal Operation Mode the TLE8457 blocks the communication between the LIN bus and the microcontroller when detecting an early undervoltage event. The RxD output will be set “high”. However, no mode change will occur. After V
S
rises above the undervoltage release level V
S,UV,REL
, the bus
communication interface will be released when the signal on the TxD input goes “high”. See
Figure 9
.
• In case the power supply V
S
drops below the power-on reset level V
S,PON
the TLE8457 not only blocks the transceiver communication, it also changes the operation mode to Init mode after recovery of V
S
Figure 10
. In Init Mode the TLE8457 indicates a power-up event on the RxD pin. The power-on reset detection is active in all operation modes.
V
S
Undervoltage blocking level
V
S,UV,OFF
Undervoltage hysteresis
V
S,UV,hys
Normal Operation mode
Power-down
Figure 10 V
S
undervoltage detection
No communication possible
Undervoltage release level
V
S,UV,ON
Power-on reset level
V
S,PON
Blanking time
t
blank,UV
Init mode (EN = “low“)
Normal Operation mode (EN = “high“) t
TLE8457_VS_UNDERVOLTAGE_A
Data Sheet 13 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
4.3
Voltage Regulator
The TLE8457 has an integrated voltage regulator dedicated for supplying microcontrollers and/or on-board sensors under harsh automotive environment conditions. It can supply a load current up to 70 mA with an output voltage tolerance within ± 2%. Because of the ultra low current consumption, the TLE8457 is perfectly suited for applications permanently connected to the battery supply. Additionally, in Sleep Mode, the voltage regulator is switched off and an even lower quiescent current can be achieved.
The voltage regulator output is protected against undervoltage, overcurrent, over-temperature and power-up failures. In case the load current rises above the functional range, for example during V output current is limited to I
CC,lim
. Therefore the V falling below the undervoltage reset threshold.
CC
CC
short circuits, the
output voltage will drop and a reset pulse will be issued if
The V
CC
supply output provides a stable supply voltage with output capacitors down to 1 µF, including low ESR multi-layer ceramic capacitors.
4.3.1
VCC Undervoltage Detection
The TLE8457 has undervoltage detection on the voltage regulator V
CC undervoltage threshold V
CC,UV
for longer than detection time t det,RST
output. If the V
CC
voltage falls below the
the NRST output will be set logical “low” and the TLE8457 will automatically enter Init Mode and start the Initialization Watchdog (see
Chapter 4.3.2
Chapter 4.4
).
t
det,RST
V
CC,UV
V
CC
Normal Operation mode (EN = „high“)
Standby mode (EN = „low“)
Init mode
Normal Operation mode (EN = „high“)
Init mode (EN = „low“) t
NRST
t
RST t
NRST goes and stays „low“ as long as
V
CC
is in undervoltage
NRST stays „low“ for additional Reset time
t
RST
Figure 11 V
CC
undervoltage detection
TLE8457_VCC_UNDERVOLTAGE
4.3.2
Reset Output
The NRST output is used for issuing reset pulses to for example an external microcontroller. In case of voltage regulator undervoltage or over-temperature events the NRST output will go “low” and a mode transition to
Init Mode will be triggered. The NRST output will stay “low” until a complete recovery from the failure and additionally for the reset time t
RST
Figure 11
While the TLE8457 is in Init Mode and NRST is “low” mode transition to Normal Operation Mode is blocked.
The NRST pin is internally pulled up to V can be implemented.
CC
. If needed in the application, an additional external pull-up resistor
Data Sheet 14 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
4.4
Initialization Watchdog
The TLE8457 features an enhanced Initialization Watchdog timer for detection of local failures and error handling for minimizing system current consumption. The benefit of this safety function is to prevent a malfunctioning ECU being stuck in Init Mode with high current consumption and draining the car battery. The
Initialization Watchdog is only active in Init Mode, with the two use cases: V
Operation Mode activation.
CC
supply initialization and Normal
V
S
1
V
S,PON
2
V
CC,UV
V
CC
NRST
Watchdog
V
CC
Supply Initialization
Timeout
1
t
RST
3
Normal Operation mode Activation
Timeout
2
5
t
to,rec
EN
Un-powered Init mode
4
Normal Operation mode
If Timeout → forced transition to Sleep mode If Timeout → forced transition to Sleep mode
4
5
1
2
3
V
S
exceeds the Power-on reset threshold →
V
CC
Supply Initialization Watchdog is started
V
CC
exceeds the
V
CC
-Undervoltage threshold → Reset timer is started
Reset timer elapses → Normal Operation mode Activation Watchdog is started
Mode change with the EN input → Mode transition to normal mode
TxD must be „high“ for at least
t
to,rec
after entering Normal mode for releasing the transmitter
TLE8457_WATCHDOG
Figure 12 Initialization Watchdog
VCC Supply Initialization
The V
CC
supply Initialization watchdog is detecting if local errors on the ECU is preventing the V
CC
supply to power up correctly because of short circuits to ground or if components on the board are drawing too high currents. The timer is started when the linear regulator is switched on after power-up events or after mode transitions to Init mode triggered by either bus wake-up or the EN input being set “high” in Sleep Mode.
Additionally, the timer will start when detecting V event.
CC
undervoltage and after recovery from an overtemperature
Data Sheet 15 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
In case the V
CC
voltage rise above the V
CC,UV
undervoltage threshold before the timer elapses, V
CC successfully initialized and the timer is disabled. If the timer elapses before V
CC
TLE8457 will autonomously transition to Sleep Mode.
is considered
powers up correctly, the
Normal Operation Mode Activation
After the TLE8457 has generated a reset pulse the Initialization Watchdog is started for monitoring the activation of Normal Operation Mode. The microcontroller must set the EN input “high” before the timer elapses after t
Init_WD
, else the TLE8457 will autonomously transition to Sleep Mode.
t
Init_WD
EN tt
t
RST
NRST
Standby mode / Sleep mode / unpowered
Figure 13 Enable activation time-out
Init mode t
Sleep mode
TLE8457_INITIALIZATION_TIMEOUT
Data Sheet 16 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
4.5
LIN Transceiver
The LIN interface is a single wire, bi-directional bus, used for in-vehicle networks. The integrated LIN transceiver of the TLE8457 is the interface between the microcontroller and the physical LIN bus (see
Figure 18
on the TxD input is converted to a LIN bus signal with optimized slew rates in order to minimize the electromagnetic emission of the LIN network. The RxD output reads back the information from the LIN bus to the microcontroller. The receiver has an integrated filter network for noise suppression from the LIN bus and to increase the electromagnetic immunity level of the transceiver.
The LIN specification defines two valid bus levels (see
Figure 14
• Dominant state with the LIN bus voltage level near GND, actively driven by a transceiver.
• Recessive state with the LIN bus voltage pulled up to the supply voltage V
S
through the bus termination.
By setting the TxD input of the TLE8457 to a logical “low” signal, the transceiver generates a dominant level on the BUS interface pin. The receiver reads back the signal on the LIN bus and indicates the dominant LIN bus signal with a logical “low” on the RxD output to the microcontroller. By setting the TxD input “high”, the transceiver sets the LIN interface pin to the recessive level. At the same time the recessive level on the LIN bus is indicated by a logical “high” signal on the RxD output.
Every LIN network consists of a master node and one or more slave nodes. To configure the TLE8457 for master node applications, a termination resistor of 1 kΩ and a diode must be connected between the LIN bus and the power supply V
S
(see
Figure 18
TxD
V
CC t
V
S
Recessive Dominant Recessive
V
th_REC
BUS
V
th_DOM t
RxD
V
CC t
TLE8457_LIN_COMMUNICATION_A
Figure 14 LIN bus signals
Data Sheet 17 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Functional Description
4.5.1
TxD Time-out
The TxD time-out feature protects the LIN bus against permanent blocking in case the logical signal on the TxD input is continuously “low”, caused by for example a malfunctioning microcontroller or a short circuit on the printed circuit board. In Normal Operation Mode, a logical “low” signal on the TxD input for time t > t
TxD disables the transmitter’s output driver stage (see
Figure 15
). The receiver will remain active and the data on the bus are still monitored on the RxD output.
The TLE8457 will release the output stage after a TxD time-out event first when detecting a logical “high” signal on the respective TxD input for the time t to,rec
.
TxD time-out due to e.g. microcontroller error
t
TxD
Normal communication
Recovery of the microcontroller error
Release after TxD time-out
t
to,rec
Normal communication
TxD t
V
BUS t
TLE8457_TXD_TIMEOUT_A
Figure 15 TxD time-out
4.5.2
Short Circuit
The BUS pin of TLE8457 can withstand short circuits to either GND or to the power supply V the TLE8457 to overheat.
S
. The integrated over-temperature protection may disable the transmitter if a permanent short circuit on the BUS pin causes
4.6
Over-temperature Protection
The TLE8457 has two independent over-temperature detectors for protecting the device against thermal overstress; on the voltage regulator pass element and on the LIN bus transmitter. In case the junction temperature at the LIN transmitter increase above the thermal shut down level T the transmitter’s junction temperature cools down below T
J
< T
JSD
JSD
, it will be disabled until
- ∆T. No other effect nor mode change will occur. After a LIN transmitter over-temperature recovery the TxD input requires a logical “high” signal before restarting data transmission.
If an over-temperature event is detected on the voltage regulator, it will be disabled and the NRST output will be set “low”. During the over-temperature condition no functionality of the TLE8457 is available. After the junction temperature cools down below T reactivated.
J
< T
JSD
- ∆T, the TLE8457 will automatically enter Init Mode and be
Note: Depending on the over-temperature circumstance, either only the LIN transmitter will detect overtemperature, for example due to bus short circuit or severe EMC injection, only the voltage regulator detector or both (simultaneously or sequentially).
Data Sheet 18 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
General Product Characteristics
5 General Product Characteristics
5.1
Absolute Maximum Ratings
Table 3 Absolute Maximum Ratings Voltages, Currents and Temperatures
1)
All voltages with respect to ground; positive current flowing into pin; unless otherwise specified
Parameter Symbol
Min.
Values
Typ.
Max.
Unit Note or
Test Condition
Voltage
Supply input voltage
Bus input voltage
V
S
V
BUS
Logic voltages at EN and TxD
V
logic,in
Logic voltages at RxD and NRST V logic,out
Voltage regulator output
Currents
V
CC
-0.3
-27
-0.3
-0.3
-0.3
–
–
–
–
–
45
40
7.0
V
CC
0.3
7.0
+
V
V
V
V
V
LIN Spec 2.2A (Par. 11)
–
–
–
–
Number
Output current at RxD
Output current at NRST
Temperature
Junction temperature
Storage temperature
ESD Susceptibility
Electrostatic discharge voltage at V
S
and BUS vs. GND
Electrostatic discharge voltage all other pins
I
I
RxD
NRST
T
j
T
V
V
s
ESD
ESD
-15
–
-40
-55
-8
-2
–
–
–
–
–
–
15
10
150
150
8
2 mA – mA –
°C
°C
–
– kV Human Body Model
(100pF via 1.5 kΩ)
2) kV Human Body Model
Electrostatic discharge voltage corner pins
V
ESD
-750 – 750 V Charged Device
Model
3)
Electrostatic discharge voltage at all other pins
V
ESD
-500 – 500 V Charged Device
Model
1) Not subject to production test, specified by design
2) ESD susceptibility, HBM according to ANSI/ESDA/JEDEC JS-001 (1.5 kΩ, 100pF)
3) ESD susceptibility, Charged Device Model “CDM” EIA / JESD 22-C101 or ESDA STM5.3.1
Notes
1. 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.
2. 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 continuous repetitive operation.
Data Sheet 19 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
General Product Characteristics
5.2
Functional Range
Table 4
Parameter
Operating Range
Symbol Values
Min.
Typ.
Max.
Unit Note or
Test Condition
Number
Supply Voltage
Supply Voltage range for Normal
Operation
Extended Supply Voltage Range for Operation
V
V
S(nor)
S(ext)
5.5
3.0
–
–
28
40
V
V
LIN Spec 2.2A Param.
10
Parameter deviations possible
Stability Requirement on VCC
Output capacitor range
Output capacitor ESR
C
VCC
1.0
ESR(C
VCC
) –
–
–
–
5.0
µF
Ω
1)
,
2)
,
Thermal parameter
Junction temperature
T
j
-40 – 150 °C
3)
1) The minimum output capacitance requirement is applicable for a worst case capacitance tolerance of 30%.
2) Relevant ESR value at f = 10 kHz.
3) 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.
Data Sheet 20 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
General Product Characteristics
5.3
Note:
Thermal Characteristics
This thermal data was generated in accordance with JEDEC JESD51 standards. For more information, please visit www.jedec.org
.
Table 5 Thermal Resistance
1)
Parameter Symbol Values
Min.
Typ.
Max.
Thermal Resistance, PG-DSO-8 Package Version
Junction ambient
R
thJA
–
Thermal Resistance, PG-TSON-8 Package Version
130 –
Unit Note or
K/W
Test Condition
2)
Number
Junction ambient
Junction ambient
Junction ambient
R
thJA
–
–
–
60
190
70
–
–
–
K/W
K/W Footprint only
3)
K/W 300mm2 heatsink on
PCB
Thermal Shutdown Junction Temperature
Thermal shutdown temperature T
JSD
160 180 200 °C
T
JSD
increasing
Thermal shutdown hysteresis ΔT – 10 – K
T
JSD
decreasing
1) Not subject to production test, specified by design.
2) Specified R thJA
value is according to Jedec JESD51-2,-5,-7 at natural convection on FR4 2s2p board; The product
(Chip+Package) was simulated on a 76.2 x 114.3 x 1.5 mm board with 2 inner copper layers (2 x 70 μm Cu, 2 x 35 μm
Cu). Where applicable a thermal via array under the exposed pad contacted to the first inner copper layer.
3) Specified RthJA value is according to Jedec JESD51-3 at natural convection on FR4 1s0p board; The product
(Chip+Package) was simulated on a 76.2 x 114.3 x 1.5 mm board with 1 inner copper layer (1 x 70 μm Cu).
Data Sheet 21 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Electrical Characteristics
6 Electrical Characteristics
6.1
Functional Device Characteristics
Table 6 Electrical Characteristics
5.5 V < V
S
< 28 V; R
LIN
= 500 Ω; -40°C < T j
< 150°C; all voltages with respect to ground; positive current flowing into pin
1)
; unless otherwise specified.
Parameter Symbol Values
Min. Typ. Max.
Unit Note or Test Condition
Current Consumption
Current consumption at V
S
, transmitter in Recessive state
Current consumption at V
S
, transmitter in Dominate state
Current consumption at V
Dominate State
Current consumption at V
Standby Mode
I
S,standby
= I
S
- I
CC
S
Current consumption at V
S
Sleep Mode
Current consumption at V
,
S in
in
Sleep Mode. Bus shorted to
GND
S in
I
I
I
I
I
I
S,rec
S,dom
S,dom_max
S,standby
S,Sleep
S,SC_GND
0.1
0.3
0.7
mA I
CC
= 50 µA; Without R
LIN
TxD = “high”; V
BUS
= V
S
0.1
1.0
3.0
mA I
CC
= 50 µA; Without R
TxD = “low”; V
BUS
= 0 V
LIN
;
70 71 73 mA I
CC
= 70 mA; Without R
TxD = “low”; V
BUS
= 0 V
LIN
;
– 20 40 µA
I
Standby Mode;
V
CC
S
= 50 µA;
= V
BUS
= 13.5 V;
–
250
7
–
16 µA Sleep Mode; V
S
V
BUS
= V
S
; V
CC
= 13.5 V;
= 0V
800 µA Sleep Mode;
V
V
S
CC
= 13.5 V; V
BUS
= 0V
= 0 V;
;
Power-up / Power-down
Power-on reset level on V
S
V
S,PON
Undervoltage threshold, V
S
on V
S,UV,ON
Undervoltage threshold, V
S
off V
S,UV,OFF
Undervoltage hysteresis on V
S
V
S,UV,hys
= V
S,UV,ON
- V
S,UV,OFF
V
S,UV,hys
Undervoltage blanking time
t
BLANK,UV
Enable Input: EN
HIGH level input voltage
LOW level input voltage
Input hysteresis
Pull-down resistance
Delay time for mode change,
EN → “low”
V
EN,ON
V
EN,OFF
V
EN,hys
R
EN
t
MODE,LOW
–
4.7
4.4
200
–
2
–
50
– 3.0
5.15 5.5
4.85 5.2
300
10
–
–
200
–
–
–
0.8
–
V
V
V mV
µs
V
V
–
Rising edge
Falling edge
2)
–
– mV –
15 30 60 kΩ –
10 – 50 µs –
– – 5 µs
Delay time for mode change,
EN → “high”
t
MODE,HIGH
Initialization Watchdog time
t
Init_WD
200 – 1000 ms –
Number
Data Sheet 22 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Electrical Characteristics
Table 6 Electrical Characteristics (cont’d)
5.5 V < V
S
< 28 V; R
LIN
= 500 Ω; -40°C < T j
< 150°C; all voltages with respect to ground; positive current flowing into pin
1)
; unless otherwise specified.
Parameter Symbol Values Unit Note or Test Condition
Min. Typ. Max.
Input capacitance Ci
EN
– 5 – pF
Reset Output: NRST
HIGH level leakage current
LOW level output voltage
I
NRST,H
V
NRST
–
–
–
–
5
0.4
µA
V
I
NRST
= 1.5 mA; V
Reset time
Internal pull-up resistance
t
RST
R
NRST
4
5
10
10
16
20 ms kΩ
–
–
Voltage Regulator Output, 5 V versions (TLE8457ASJ and TLE8457ALE): VCC
CC
> 1 V;
Output voltage
V
CC
V
DR
4.9
–
5.0
5.1
V 0.05 mA < I
CC
< 70 mA;
5.8 V < VS < 28 V
250 650 mV I
CC
< 70 mA
Number
Output voltage drop
V
DR
= V
S
- V
CC
3)
Output voltage drop, 50mA
V
DR
= V
S
- V
CC
Output voltage drop, 20mA
V
DR
= V
S
- V
CC
Output current limitation
Load regulation
I
V
V
DR,50
DR,20
CC,lim
∆V
CC,lo
–
–
180
80
480
200 mV I mV I
CC
CC
< 50 mA
< 20 mA
Line regulation
∆V
Power supply ripple rejection PSRR
Undervoltage reset threshold V
CC,li
CC,UV
-150 –
–
-70 mA 0 V < V
CC
< 4.8 V
25 50 mV 0.05 mA < I
CC
VS = 13.5 V
< 70 mA;
–
50
25 50 mV I
CC
= 1 mA;
5.8 V < V
S
< 28 V
60 – dB
; I
V
r
CC
= 50 mA; f = 100 Hz;
= 0.5 V pp
; V
S
= 13.5 V
4.27 4.4
4.5
V
V
CC decreasing
Undervoltage reset hysteresis V
CC,UV,hy
50 100 – mV –
Undervoltage detection time t det,RST
1 – 20 µs
C
; V
CC
NRST
= 3.5 V
= 20 pF
Voltage Regulator Output, 3.3 V versions (TLE8457BSJ and TLE8457BLE): VCC
Output voltage
V
CC
V
DR
3.234 3.300 3.366 V
–
0.05 mA < I
CC
< 70 mA;
4.066 V < VS < 28 V
380 770 mV I
CC
< 70 mA Output voltage drop
V
DR
= V
S
- V
CC
Output voltage drop, 50mA
V
DR
= V
S
- V
CC
Output voltage drop, 20mA
V
DR
= V
S
- V
CC
Output current limitation
I
V
V
DR,50
DR,20
CC,lim
–
–
280
110
-150 –
550
220
-70 mV I mV I
CC
CC
< 50 mA
< 20 mA mA 0 V < V
CC
< 3.1 V
Data Sheet 23 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Electrical Characteristics
Table 6 Electrical Characteristics (cont’d)
5.5 V < V
S
< 28 V; R
LIN
= 500 Ω; -40°C < T j
< 150°C; all voltages with respect to ground; positive current flowing into pin
1)
; unless otherwise specified.
Parameter Symbol Values Unit Note or Test Condition
Load regulation
Line regulation
∆V
∆V
Power supply ripple rejection PSRR
Undervoltage reset threshold V
CC,lo
CC,li
CC,UV
Min. Typ. Max.
– 25 50 mV 0.05 mA < I
CC
V
S
= 13.5 V
< 70 mA;
–
50
25 50 mV I
CC
= 1 mA;
4.066 V < V
S
60 – dB
< 28 V
; I
V
r
CC
= 50 mA; f = 100 Hz;
= 0.5 V pp
; V
S
= 13.5 V
2.82 2.90 2.96 V
V
CC decreasing
Number
Undervoltage reset hysteresis V
Undervoltage detection time t
Receiver Output: RxD
HIGH level output voltage
LOW level output voltage
CC,UV,hy det,RST
V
RxD,H
V
RxD,L
33
1
66
–
–
20 mV –
µs
C
; V
CC
NRST
= 2.31 V
= 20 pF
0.8
× V
–
CC
–
–
–
0.2
× V
CC
V
V
I
I
RxD
RxD
= -2 mA; V
BUS
= 2 mA; V
BUS
= V
S
= 0 V
Transmission Input: TxD
HIGH level input voltage range V
TxD,H
LOW level input voltage range V
Input hysteresis
Pull-up resistance
TxD time-out
TxD recessive release time
Input capacitance
Bus Receiver: BUS
Receiver threshold voltage, recessive to dominant edge
Receiver dominant state
Receiver threshold voltage, dominant to recessive edge
Receiver recessive state
Receiver center voltage
TxD,L
V
TxD,hys
R
TxD
t
TxD
t
to,rec
Ci
V
V
V
V
V
th_dom
BUSdom th_rec
BUSrec
BUS_CNT
–
–
0.7
× V
CC
–
–
–
200 –
–
0.3
× V
CC
–
V
V
Recessive state
Dominant state mV –
15 30 60 kΩ –
8 18 28 ms –
– 10 µs
5 – pF
0.4
× V
S
0.44
-27 –
–
0.6
× V
S
0.475
× V
S
× V
S
0.56
× V
S
–
0.5
× V
S
–
0.4
× V
S
0.6
× V
S
V
V
40 V
0.525
× V
S
V
V
V
LIN Spec 2.2A (Par. 17)
V
LIN Spec 2.2A (Par. 19)
V
S
S
< 18V;
< 18V;
LIN Spec 2.2A (Par. 18)
S
< 18V;
4)
5)
6)
Data Sheet 24 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Electrical Characteristics
Table 6 Electrical Characteristics (cont’d)
5.5 V < V
S
< 28 V; R
LIN
= 500 Ω; -40°C < T j
< 150°C; all voltages with respect to ground; positive current flowing into pin
1)
; unless otherwise specified.
Parameter Symbol Values Unit Note or Test Condition
Receiver hysteresis
Wake-Up threshold voltage
V
V
HYS
BUS,wk
Min. Typ. Max.
0.07
× V
S
0.4
× V
S
0.12
× V
0.5
× V
S
S
0.175
× V
0.6
× V
S
S
V
V
LIN Spec 2.2A (Par. 20)
V
–
S
< 18V;
7)
Number
Bus Transmitter: BUS
Bus recessive output voltage V
BUS,ro
Bus short circuit current
Leakage current
Leakage current
Leakage current
Leakage current
Forward voltage serial diode
Bus pull-up resistance
Bus dominant output voltage maximum load
Bus dominant output voltage maximum load
I
I
I
I
I
V
BUS_LIM
BUS_NO_GND
BUS_NO_BAT
BUS_PAS_dom
BUS_PAS_rec
SerDiode
R
slave
V
V
BUS,do
BUS,do
Input capacitance Ci
BUS
Dynamic Transceiver Characteristics: BUS
Dominant time for Bus Wakeup
Propagation delay:
LIN bus Dominant to RxD Low
LIN bus Recessive to RxD High
Receiver delay symmetry t t
t t
WK,bus rx_pdft rx_pdr rx_sym
0.8
× V
S
– V
S
V TxD = “high”; Open load
40 85 125 mA V
BUS
= 18 V;
LIN Spec 2.2A (Par. 12);
-1 -0.5
–
– 1 5 mA V
S
= 0 V; V
BUS
= -12 V;
LIN Spec 2.2A (Par. 15)
µA
V
S
= 0 V; V
BUS
= 18 V;
LIN Spec 2.2A (Par. 16)
-1
–
-0.5
1
–
5 mA V
S
= 18 V; V
BUS
= 0 V;
LIN Spec 2.2A (Par. 13)
µA
V
S
= 8 V; V
BUS
= 18 V;
Driver stage “off”;
TxD = “high”;
LIN Spec 2.2A (Par. 14)
0.4
– 1.0
V
I
SerDiode
= - 75 µA
LIN Spec 2.2A (Par.21)
20 40 60 kΩ LIN Spec 2.2A (Par. 26)
–
–
–
–
–
1.4
V
2.0
30
V pF
V
V
TxD
S
= 0 V; R
= 5.5 V;
LIN
= 500 Ω;
V
V
TxD
S
= 0 V; R
= 18 V;
LIN
= 500 Ω;
30
1
1
-2
–
3.5
3.5
–
150
6
6
2
µs
µs
µs
–
LIN Spec 2.2A (Par. 31)
C
RxD
= 20 pF
µs LIN Spec 2.2A (Par. 32)
t
C
rx_sym
RxD
= t rx_pdf
= 20 pF
- t rx_pdr
;
Data Sheet 25 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Electrical Characteristics
Table 6 Electrical Characteristics (cont’d)
5.5 V < V
S
< 28 V; R
LIN
= 500 Ω; -40°C < T j
< 150°C; all voltages with respect to ground; positive current flowing into pin
1)
; unless otherwise specified.
Parameter Symbol Values Unit Note or Test Condition
Duty cycle D1
(for worst case at 20 kBit/s)
D1
Min. Typ. Max.
0.396 – –
Number
D1 = t
Duty cycle D1
V
S
supply 5.5 V to 7.0 V
(for worst case at 20 kBit/s)
D1 = t bus_rec(min)
Duty cycle D2
/ 2 × t bit
(for worst case at 20 kBit/s)
D2 = t bus_rec(max)
Duty cycle D2
V
S
supply 6.1 V to 7.6 V
(for worst case at 20 kBit/s)
D2 = t bus_rec(max)
Duty cycle D3
V
S
/ 2 × t bit
supply 7.0 V to 18.0 V
(for worst case at 10.4 kBit/s)
D3 = t bus_rec(min)
Duty cycle D3
V
S
supply 5.5 V to 7.0 V
(for worst case at 10.4 kBit/s)
D3 = t bus_rec(min) bus_rec(min)
/ 2 × t
/ 2 × t
/ 2 × t
/ 2 × t bit bit bit bit
D1
D2
D2
D3
D3
0.396 –
–
–
–
–
0.417 –
0.417 –
–
0.581
0.581
–
–
Duty cycle 1
TH
TH
Dom
V
S
Rec
8)
(max) = 0.744 × V
(max) =0.581 × V
S
= 7.0 … 18 V; t bi
LIN Spec 2.2A (Par. 27)
S
;
;
= 50 µs; t
Duty cycle 1
TH
Rec
TH
Dom
(max) = 0.760 × V
5.5 V < V bit
S
= 50 µs
< 7.0 V;
S
;
(max) = 0.593 × V
S
;
Duty cycle 2
TH
Rec
TH
Dom
(min)= 0.422 × V
S
;
(min)= 0.284 × V
S t
V
S
= 7.6 … 18 V; bit
= 50 µs;
LIN Spec 2.2A (Par. 28)
; t
Duty cycle 2
TH
Rec
TH
Dom
(min)= 0.41 × V
6.1 V < V bit
S
< 7.6 V;
= 50 µs;
S
;
(min)= 0.275 × V
S
;
Duty cycle 3
TH
Rec
(max) = 0.778 × V t
V
S
= 7.0 … 18 V; bit
= 96 µs;
LIN Spec 2.2A (Par. 29)
S
;
TH
Dom
(max) =0.616 × V
S
;
Duty cycle 3
TH
Rec
(max) = 0.797 × V
TH
Dom
(max) = 0.630 × V
5.5 V < V t bit
S
< 7.0 V;
= 96 µs;
S
;
S
;
Data Sheet 26 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Electrical Characteristics
Table 6 Electrical Characteristics (cont’d)
5.5 V < V
S
< 28 V; R
LIN
= 500 Ω; -40°C < T j
< 150°C; all voltages with respect to ground; positive current flowing into pin
1)
; unless otherwise specified.
Parameter Symbol Values Unit Note or Test Condition Number
Min. Typ. Max.
Duty cycle D4
V
S
supply 7.6 V to 18.0 V
(for worst case at 10.4 kBit/s)
D4 = t bus_rec(max)
/ 2 × t bit
D4
– – 0.590
Duty cycle 4
TH t
V
Rec
(min) = 0.389 × V
TH
S
Dom
(min) = 0.251 × V
= 7.6 … 18 V; bit
= 96 µs;
LIN Spec 2.2A (Par. 30)
S
;
S
;
Duty cycle D4
V
S
supply 6.1 V to 7.6 V
(for worst case at 10.4 kBit/s)
D4
– – 0.590
t
Duty cycle 4
TH
Rec
(min) = 0.378 × V
TH
Dom
(min)= 0.242 × V
S
6.1 V < V bit
S
< 7.6 V;
= 96 µs;
S
;
;
D4 = t bus_rec(max)
/ 2 × t bit
1) Load current on VCC specified positive direction out of pin.
2) Not subject to production test, specified by design.
3) Measured when the output voltage VCC has dropped 100 mV from the nominal value obtained at VS = 13.5V
4) Minimum limit specified by design.
5) Maximum limit specified by design.
6) V
BUS_CNT
7) V
HYS
= V
= (V
th_rec th_dom
+ V
- V
th_dom
.
th rec
) / 2;.
8) Bus load according to LIN Spec 2.2A:
Load 1 = 1 nF / 1 kΩ = C
BUS
Load 2 = 6.8 nF / 660 Ω = C
BUS
Load 3 = 10 nF / 500 Ω = C
/ R
LIN
BUS
/ R
/ R
LIN
LIN
Data Sheet 27 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Electrical Characteristics
6.2
Diagrams
R
LIN
C
Bus
100 nF
V
S
V
CC
BUS
GND
NRST
EN
TxD
RxD
Figure 16 Simplified test circuit for dynamic transceiver characteristics
C
VCC
C
NRST
C
RxD
TLE8457_TEST_CIRCUIT_A
t
Bit
t
Bit
TxD
(input to transmitting node)
t
Bus_dom(max)
t
Bus_rec(min)
V
SUP
(Transceiver supply of transmitting node)
TH
Rec(max)
TH
Dom(max)
TH
Rec(min)
TH
Dom(min)
t
Bus_dom(min)
t
Bus_rec(max)
RxD
(output of receiving node 1)
t
rx_pdf(1)
t
rx_pdr(1)
RxD
(output of receiving node 2)
t
rx_pdr(2)
Duty Cycle D1, D3 = t
BUS_rec(min)
/ (2 x t
BIT
)
Duty Cycle D2, D4 = t
BUS_rec(max)
/ (2 x t
BIT
)
Figure 17 Timing diagram for dynamic transceiver characteristics
t
Bit
Thresholds of receiving node 1
Thresholds of receiving node 2
t
rx_pdf(2)
TLE8457_LIN_TIMING_DIAGRAM_A
Data Sheet 28 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Application Information
7 Application Information
Note:
7.1
The following information is given as a hint for the implementation of the device only and shall not be regarded as a description or warranty of a certain functionality, condition or quality of the device.
Application Example
V
Bat
LIN
BUS
1kΩ
1nF
22μF 100nF
100nF
7
V
S
6
BUS
V
I
V
Q
TLE42xx
GND
INH
1μF
5 V or 3.3V
100nF
INH
8
2.4kΩ
Pull-Up to MCU
Supply
TLE7258
RxD
1
4
TxD
2
EN
GND
5
V
CC
Micro Controller e.g XC22xx
GND
ECU_1
22μF 100nF
1
V
S
220pF
4
BUS
V
CC
8
1μF
TLE8457
GND
3
RxD
NRST
TxD
EN
5
7
6
2
100nF
V
CC
Micro Controller e.g XC22xx
GND
ECU_X
Figure 18 Simplified application circuit
Data Sheet 29 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Application Information
7.2
ESD Robustness according to IEC61000-4-2
Test for ESD robustness according to IEC61000-4-2 (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 Results Unit Remarks
Electrostatic discharge voltage at pin V
S
, BUS versus GND +8 kV
1)
Positive pulse
Electrostatic discharge voltage at pin V
S
, BUS versus GND -8 kV
1) ESD susceptibility according LIN EMC 1.3 Test Specification, Section 4.3. (IEC 61000-4-2) - Tested by external test house.
7.3
Transient Robustness according to ISO 7637-2
Test for transient robustness according to ISO 7637-2 have been performed. The results and test conditions are available in a separate test report.
Table 8 Automotive Transient Robustness according to ISO 7637-2
Performed Test
Pulse 1
Pulse 2
Pulse 3a
Pulse 3b
Results Unit
-100
+75
-150
+100
V
V
V
V
7.4
LIN Physical Layer Compatibility
As the LIN physical layer is independent from higher LIN layers (for example LIN protocol layer), all nodes with a LIN physical layer according to this revision can be mixed with LIN physical layer nodes, which are according to older revisions (LIN 1.0, LIN 1.1, LIN 1.2, LIN 1.3, LIN 2.0, LIN 2.1 and LIN 2.2), without any restrictions.
Data Sheet 30 Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Package Outlines
8 Package Outlines
1.27
0.41
+0.1
-0.06
2)
0.1
0.2
M
A B 8x
B
4
-0.2
1)
0.35 x 45˚
C
+0.06
0.19
6
±0.2
0.64
±0.25
0.2
M
C 8x
8 5
1 4
5
-0.2
1)
Index Marking
A
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 19 PG-DSO-8 (Plastic Dual Small Outline PG-DSO-8)
3
±0.1
0.05
0.1
±0.1
Z
0.3
±0.1
2.4
±0.1
0.38
±0.1
Pin 1 Marking
Z (4:1)
0.65
±0.1
Pin 1 Marking
0.3
±0.1
PG-TSON-8-1-PO V01
0.07 MIN.
Figure 20 PG-TSON-8 (Plastic Thin Small Outline Nonleaded PG-TSON-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
.
Data Sheet 31
Dimensions in mm
Rev. 1.0
2016-08-05
TLE8457
LIN Transceiver with integrated Voltage Regulator
Revision History
9 Revision History
Table 9 Revision History
Revision
1.0
Data
2016-08-05
Changes
Data Sheet created
Data Sheet 32 Rev. 1.0
2016-08-05
Please read the Important Notice and Warnings at the end of this document
Trademarks of Infineon Technologies AG
µHVIC™, µIPM™, µPFC™, AU-ConvertIR™, AURIX™, C166™, CanPAK™, CIPOS™, CIPURSE™, CoolDP™, CoolGaN™, COOLiR™, CoolMOS™, CoolSET™, CoolSiC™,
DAVE™, DI-POL™, DirectFET™, DrBlade™, EasyPIM™, EconoBRIDGE™, EconoDUAL™, EconoPACK™, EconoPIM™, EiceDRIVER™, eupec™, FCOS™, GaNpowIR™,
HEXFET™, HITFET™, HybridPACK™, iMOTION™, IRAM™, ISOFACE™, IsoPACK™, LEDrivIR™, LITIX™, MIPAQ™, ModSTACK™, my-d™, NovalithIC™, OPTIGA™,
OptiMOS™, ORIGA™, PowIRaudio™, PowIRStage™, PrimePACK™, PrimeSTACK™, PROFET™, PRO-SIL™, RASIC™, REAL3™, SmartLEWIS™, SOLID FLASH™,
SPOC™, StrongIRFET™, SupIRBuck™, TEMPFET™, TRENCHSTOP™, TriCore™, UHVIC™, XHP™, XMC™.
Trademarks updated November 2015
Other Trademarks
All referenced product or service names and trademarks are the property of their respective owners.
Edition 2016-08-05
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2016 Infineon Technologies AG.
All Rights Reserved.
Do you have a question about any aspect of this document?
Email: [email protected]
IMPORTANT NOTICE
The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics ("Beschaffenheitsgarantie").
With respect to any examples, hints or any typical values stated herein and/or any information regarding the application of the product, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of non-infringement of intellectual property rights of any third party.
In addition, any information given in this document is subject to customer's compliance with its obligations stated in this document and any applicable legal requirements, norms and standards concerning customer's products and any use of the product of
Infineon Technologies in customer's applications.
The data contained in this document is exclusively intended for technically trained staff. It is the responsibility of customer's technical departments to evaluate the suitability of the product for the intended application and the completeness of the product information given in this document with respect to such application.
For further information on technology, delivery terms and conditions and prices, please contact the nearest
Infineon Technologies Office ( www.infineon.com
).
WARNINGS
Due to technical requirements products may contain dangerous substances. For information on the types in question please contact your nearest Infineon
Technologies office.
Except as otherwise explicitly approved by Infineon
Technologies in a written document signed by authorized representatives of Infineon Technologies,
Infineon Technologies’ products may not be used in any applications where a failure of the product or any consequences of the use thereof can reasonably be expected to result in personal injury.
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