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TLIN1028-Q1 bảng dữ liệu(PDF) 19 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  TLIN1028-Q1 Automotive Local Interconnect Network (LIN) Transceiver with Integrated Voltage Regulator
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TLIN1028-Q1 bảng dữ liệu(HTML) 19 Page - Texas Instruments

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Comp
DR/
Slope
CTL
Filter
Control
EN
VSUP
LIN
RXD
TXD
VSUP/2
45 kQ
VCC
VSUP
GND
VCC
5.0 V or 3.3 V LDO
POR
CNTL
250 kO
VCC
nRST
UV
DET
Fault
Detection
& Protection
Dominant
State
Timeout
350 lQ
350 lQ
19
TLIN1028-Q1
www.ti.com
SLLSEX4 – AUGUST 2019
Product Folder Links: TLIN1028-Q1
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
9 Detailed Description
9.1 Overview
The TLIN1028-Q1 LIN transceiver is a Local Interconnect Network (LIN) physical layer transceiver, compliant to
LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A and ISO/DIS 17987–4.2 with integrated wake-up and protection features. The
LIN bus is a single-wire, bidirectional bus that typically is used in low speed in-vehicle networks with data rates
that range up to 20 kbps. The LIN receiver works up to 100 kbps supporting in-line programming. The device
converts the LIN protocol data stream on the TXD input into a LIN bus signal using a current-limited wave-
shaping driver which reduces electromagnetic emissions (EME). The receiver converts the data stream to logic
level signals that are sent to the microprocessor through the open-drain RXD pin. The LIN bus has two states:
dominant state (voltage near ground) and recessive state (voltage near battery). In the recessive state, the LIN
bus is pulled high by the internal pull-up resistor (45 k
Ω) and a series diode.
Ultra-low current consumption is possible using the sleep mode. The TLIN1028 provides two methods to wake
up from sleep mode: EN pin and LIN bus. The device integrates a low dropout voltage regulator with a wide input
from VSUP providing 5 V ±2% or 3.3 V ±2% with up to 125 mA of current depending upon system implementation.
nRST is asserted high when VCC increases above UVCC and stays high as long as VCC is above this threshold.
9.2 Functional Block Diagram
Figure 19. Functional Block Diagram
9.3 Feature Description
9.3.1 LIN (Local Interconnect Network) Bus
This high voltage input or output pin is a single wire LIN bus transmitter and receiver. The LIN pin can survive
transient voltages up to 58 V. Reverse currents from the LIN to supply (VSUP) are minimized with blocking diodes,
even in the event of a ground shift or loss of supply (VSUP).
9.3.1.1 LIN Transmitter Characteristics
The transmitter meets thresholds and AC parameters according to the LIN specification. The transmitter is a low
side transistor with internal current limitation and thermal shutdown. During a thermal shutdown condition, the
transmitter is disabled to protect the device. There is an internal pull-up resistor with a serial diode structure to
VSUP, so no external pull-up components are required for the LIN slave mode applications. An external pull-up
resistor and series diode to VSUP must be added when the device is used for a master node application.


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