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December 05, 2016, 01:25:22 01:25


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Author Topic: J1850 VPW transceiver IC - replacement?  (Read 547 times)
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Signal
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« on: February 12, 2016, 06:29:35 18:29 »

I found references to AU5780A, MC33390, HIP7020. It seems that they are obsolete. There were also transceivers integrated with voltage regulator. I did not find them available too.
The known workaround is to make simplified interface using three transistors. At least it lacks pulse wave shaping and occupies more space then SOIC8.

Does anybody know an adequate replacement for these old ICs? Maybe transceivers of other standards that are physically(electrically) similar or compatible with J1850 VPW?
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cup58
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« Reply #1 on: February 13, 2016, 06:37:31 06:37 »

MC33390 and HIP7020AB seem to be available from utsource.net. However, according to their datasheets, the pin assignments are different, so check carefully in case you choose one of them:

http://cs.utsource.net/goods_files/pdf/87/87968_MOTOROLA_MC33390.pdf

http://cs.utsource.net/goods_files/pdf/67/67195_INTERSIL_HIP7020.pdf

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PICker
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« Reply #2 on: February 13, 2016, 09:15:49 09:15 »

Did you think about the emulation of the J1850 VPW protocol?
http://www.mictronics.de/projects/j1850-vpw-interface/
http://dangerousprototypes.com/forum/viewtopic.php?f=4&t=2582&view=next
https://en.wikipedia.org/wiki/OBDuino
https://github.com/sparkfun/OBD-II_UART
https://www.sparkfun.com/products/9555
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Signal
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« Reply #3 on: February 22, 2016, 04:16:06 16:16 »

MC33390 and HIP7020AB seem to be available from utsource.net.
I was not precise using word "available". Of course we can buy obsolete parts from china. But I consider buying obsolete parts only for repair. J1850 itself looks obsolete, but it's another story.

Did you think about the emulation of the J1850 VPW protocol?
Did you think that someone who thinks about emulation of the J1850 VPW protocol most probably already read first page of google search result?
Anyway this is an offtopic, don't you think?
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