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TH8080
LIN Transceiver
 Download TH8080 Datasheet (PDF)
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TH8080 General Description
The TH8080 is a physical layer device for a single wire data link capable of operating in applications where high data rate is not required and a lower data rate can achieve cost reductions in both the physical media components and in the microprocessor which use the network. The TH8080 is designed in accordance to the physical layer definition of the LIN Protocol Specification, Rev. 1.3 and 2.0 and SAE J2602.The IC furthermore can be used in ISO9141 systems.
Because of the very low current consumption of the TH8080 in recessive state it’s suitable for ECU applications with hard standby current requirements, whereby no sleep/wake up control from the microprocessor is necessary.
TH8080 Features and Benefits
- Compliant to LIN Specification Version 1.3, 2.x and J2602
- Compatible to ISO9141 functions
- Baud rate up to 20 kBaud
- Low current consumption of typ. 24µA
- Operating voltage VS = 6 to 18 V
- BUS input voltage -27V to 40V
- Slew rate control for good EME behavior
- High EMI immunity
- Fully integrated receiver filter
- Bus terminals proof against short-circuits and transients in the automotive environment
- High impedance BUS pin in case of loss of ground and undervoltage condition
- Thermal overload protection
- Integrated termination resistor for LIN slave nodes (30k)
- High signal symmetry for using in RC – based slave nodes up to 2% clock tolerance
- 4kV ESD protection at any pin
TH8080 Environmental Information
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TH8080 Frequently asked Questions
TH8080 trouble
Question
i am experimenting with a couple of LIN transceivers, TH8080 and TH8061. The TH8061 works all as expected but with the TH8080 i have trouble with the RX pin, it doesn't respond at all.
i have Tx and the LIN bus up and running but no sign of live from the Rx pin.
it is neither GND, 5V or 12V but seems to be floating.
I have tried to exchange the with another TH8080 (i have a few) but it is still the same result.
i have double checked my wiring and it all seems correct to me.
any ideas on what the problem could be?
Answer
the TH8080 RxD pin is an open drain output. You have to connect an pull-up resistor of 2.7k to VCC (5V). This should solve your problem.
In the datasheet on page 16 you will find an application schematic, which explain it in detail.
Answer
There is a difference between TH8061 and TH8080. The the TH8061 has a push pull output and the TH8080 has an open drain output.
Question
i have tested my circuit with the pull up and it all works perfectly now, so thanx again.
the application circuit in the TH8061 datasheet (page 26) shows a slave-node with TH8061 and a master-node with a TH8080. anyway there is no pull-up in the TH8080 circuit. maybe someone should point that out to the author of the datasheet.
i have a general question about LIN. It seems like most LIN developers prefer the 9600 baudrate dispite the loss in response time. what is the main reason for that?
About TH3122
Question
Now I have use Th3122 to develop light module with K-BUS.
I have a question.
Do I can use LIN tranceiver (as TH8080) to replace K-BUS tranceiver(TH3122)?
LIN-BUS and K-BUS physical layer is or not compatible?
Question
I am thank your reply very much. I went to use TH8080 replace TH3122 as the K-BUS tranceiver. It is or not doable?
Physical layer Diffenrence between K bus and LIN bus, is or not infect message communication at K BUS.
I devolop light module with K BUS, and I use TH8080 as K bus tranceiver. In the future TH8080 and TH3122 is or not connect K bus as node at the same time, communication's reliability between them is acceptable?
Answer
yes, you can use the TH8080 as physical layer. The TH3122 has additional integrated a voltage regulator. In case you use the TH8080 you must add this voltage regulator if you need it on you module as separate part or you use our new TH8062 which has already a 70mA voltage regulator and a LIN physical layer integrated.
The pure physical layer of K-Bus and LIN is comparable. The protocol is different!
The termination network for K-bus is always external and for LIN you have it for all slaves already integrated.
I don't understand you last paragraf! Therefore I have forward you email to our technical rep located in Hong Kong. Perhaps it is better to discuss with him directly. He will contact you asap.
Question
I am thank your reply very much. Excuse me, My english is not good.
Above my last paragraph is next note.
Now we are develop a body control module with K bus.
I want to use TH8080 or TH8062 for k bus tranceiver of my body control module. I want to know that TH8080 or TH8062 can is or not use for k bus tranceiver?
If my BCM with k bus use TH8080 and other ECU with k BUS use TH3122, then communication can is or not normally run between them which is connect a k bus?
Answer
want to use TH8080 or TH8062 for k bus
tranceiver of my body control module.
I want to know that TH8080 or TH8062
can is or not use for k bus tranceiver?
This is possible. We have one customer which has such a solution is series production!
If my BCM with k bus use TH8080 and other
ECU with k BUS use TH3122, then communication
can is or not normally run between them which
is connect a k bus?
If you use the K-Bus protocoll for communication then it should be possible. Up to now we don't have such a case, but from the principle this should work.
All of our LIN transceiver are also compatible to K-Bus.
Buy TH8080
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