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TLIN1028-Q1 Datenblatt(PDF) 22 Page - Texas Instruments

Teilenummer TLIN1028-Q1
Bauteilbeschribung  TLIN1028-Q1 Automotive Local Interconnect Network (LIN) Transceiver with Integrated Voltage Regulator
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Hersteller  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TLIN1028-Q1 Datenblatt(HTML) 22 Page - Texas Instruments

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EN
LIN Bus
< tCLEAR
tLINBUS
tLINBUS
tLINBUS
tCLEAR
EN
LIN Bus
< tLINBUS
< tLINBUS
tLINBUS
22
TLIN1028-Q1
SLLSEX4 – AUGUST 2019
www.ti.com
Product Folder Links: TLIN1028-Q1
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
Feature Description (continued)
Figure 21. No Bus Fault: Entering Sleep Mode with Bus Recessive Condition and Wakeup
Figure 22. Bus Fault: Entering Sleep Mode with Bus Stuck Dominant Fault, Clearing, and Wakeup
9.3.9.3 Thermal Shutdown
The LIN transmitter is protected by current limiting circuit; however, if the junction temperature of the device
exceeds the thermal shutdown threshold, the device puts the LIN transmitter into the recessive state and turns
off the VCC regulator. The nRST pin is pulled to ground during a TSD event. Once the over-temperature fault
condition has been removed and the virtual junction temperature has cooled beyond the hysteresis temperature,
the transmitter is re-enabled. During this fault the device enters a TSD off mode. Once the junction temperature
cools, the device enters standby mode as per the state diagram.
9.3.9.4 Under Voltage on VSUP
The device contains a power-on reset circuit to avoid false bus messages during under voltage conditions when
VSUP is less than UVSUP.
9.3.9.5 Unpowered Device and LIN Bus
In automotive applications, some LIN nodes in a system can be unpowered (ignition supplied) while others in the
network remain powered by the battery. The device has extremely low unpowered leakage current from the bus,
so an unpowered node does not affect the network or load it down.
9.4 Device Functional Modes
The TLIN1028-Q1 has three functional modes of operation, normal, sleep, and standby. The next sections
describes these modes as well as how the device moves between the different modes. Figure 23 graphically
shows the relationship while Table 1 shows the state of pins.
Table 1. Operating Modes
Mode
EN
RXD
LIN BUS
Termination
Transmitter
nRST
Comment
Sleep
Low
Floating
Weak Current pull-
up
Off
Ground
nRST is internally connected to the LDO output which
in sleep mode is pulled to ground


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