Cheap low power CAN Bus Tranceivers

[lpcware]

Content originally posted in LPCWare by larryvc on Mon May 23 14:42:55 MST 2011
I did a forum site search for Can Bus Transceivers and came up blank.  I thought that I had seen a post for transceivers but could not find it.:confused:

Zero do you have any recommendations?:)

[lpcware]

Content originally posted in LPCWare by OXO on Mon Jul 18 01:00:52 MST 2011
:eek:

very odd. I looked last week, and couldn't find..

Thanks Serge

[lpcware]

Content originally posted in LPCWare by serge on Mon Jul 18 00:50:17 MST 2011

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Quote:

Manufacturer: VISHAY SILICONIX
Order Code: 1652279
Manufacturer Part No: SI9243AEY

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Farnell has 1797 parts (soic) in stock.... :confused:

Hard to find isn't it?

[lpcware]

Content originally posted in LPCWare by OXO on Mon Jul 18 00:29:55 MST 2011
I'm not looking for CAN transceiver.. the TJA1050 is fine for that.

What I'm trying to find is anyone with stock of the SI9243. That's a K-Line transceiver for pre-canbus systems..

[lpcware]

Content originally posted in LPCWare by NXP_Europe on Sun Jul 17 15:08:19 MST 2011
Hello larryvc,

On which controller are you going to connect the CAN driver?
In the LPC11C2x the driver in build in (...)

see link: http://www.nxp.com/news/content/file_1808.html

[I]Typically, CAN transceivers can cost as much as or even more than the microcontroller itself. Integrating the CAN transceiver on board increases system reliability and quality, reduces electrical interconnect and compatibility issues, and reduces board space by over 50 percent while adding less than 20 percent to the MCU cost. The LPC11C22 and LPC11C24 are the latest additions to the LPC11C00 series of CAN 2.0B-compliant controllers. [/I]

Integrated is the TJF1051.

[lpcware]

Content originally posted in LPCWare by Ex-Zero on Sun Jul 17 01:47:16 MST 2011
Even today NXP CAN transceiver 'Selection guide' shows a min. supply voltage of 4.5V (TJA1042) :eek::eek:

I don't understand that, but obviously everyone who needs transceivers for a 3.3V systems is buying them somewhere else :)

[lpcware]

Content originally posted in LPCWare by jharwood on Sat Jul 16 20:26:03 MST 2011
The cheap TJA1040's work great if powered with a solid 5v supply.

However, if you are trying to make a USB Vbus powered device, they can only work up to a point.

My USB Vbus measures only 4.18v. This is way outside the TJA1040's operating spec, but it seems to work up to 500kbps on a really short length CAN bus.

To get 1Mbps, I have to power the TJA1040 with 5v from an external supply, then it works quite well.

So Zero's recommendation of using the TI SN65xx transceiver is well worth considering.

[lpcware]

Content originally posted in LPCWare by larryvc on Tue May 24 01:16:15 MST 2011

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Quote: kayoda
He's using and recommending 3.3V transceivers from TI: SN65HVD230-232

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Thanks for that Kay.  I'll take a look at that in the morning.

Larry

[lpcware]

Content originally posted in LPCWare by ex-kayoda on Tue May 24 01:00:11 MST 2011

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Quote:

Zero do you have any recommendations?

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He's using and recommending 3.3V transceivers from TI: SN65HVD230-232

____
Kay

[lpcware]

Content originally posted in LPCWare by larryvc on Tue May 24 00:50:31 MST 2011
Ciao Martinho,

Thanks for that information.  The standby mode on the TJA1040 is what interests me most on that transceiver.

Grazie,
Larry

[lpcware]

Content originally posted in LPCWare by martinho on Tue May 24 00:17:12 MST 2011

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Quote: larryvc
Digikey has 192,000 of the TJA1050s and 7,000+ of the TJA1040s.  I would prefer to use NXP parts if I can.

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I'm using the TJA1040 in a lotto of design's it's a very nice driver, and do not need any filtering on the CAN-Bus (even if you have to be EMC conform to Automotive limit's) thanks to the very good symmetry and the Split pin.

[lpcware]

Content originally posted in LPCWare by larryvc on Mon May 23 16:55:57 MST 2011

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Quote: Rob65

The tja1050 seems nice but it's old and most parts providers don't have any 1040/1050's on stock anymore.
Maybe the MCP2551 is a nice alternative - at least that one seems to be available.

I've been searching nxp.com for "CAN [B][U]tranceiver[/U][/B]" but all I end up with is the 74HC245 :confused: and yes I know that is [B][I]not[/I] [/B]a CAN [B][U]tranceiver[/U][/B]: I've been writing test programs for a high speed tester to test timing specs of that chip (way back when I was still young) :eek:

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Digikey has 192,000 of the TJA1050s and 7,000+ of the TJA1040s.  I would prefer to use NXP parts if I can.

Oh my, I spellded Transceivers wrong in the thread titel.:o  Your search might come back with more hits if you fix the above.:rolleyes:

[lpcware]

Content originally posted in LPCWare by Rob65 on Mon May 23 16:10:57 MST 2011
Nope,

I've also been looking.
The tja1050 seems nice but it's old and most parts providers don't have any 1040/1050's on stock anymore.
Maybe the MCP2551 is a nice alternative - at least that one seems to be available.

I've been searching nxp.com for "CAN tranceiver" but all I end up with is the 74HC245 :confused: and yes I know that is [B][I]not[/I] [/B]a CAN tranceiver: I've been writing test programs for a high speed tester to test timing specs of that chip (way back when I was still young) :eek:

[lpcware]

Content originally posted in LPCWare by larryvc on Mon May 23 15:24:11 MST 2011

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Quote: larryvc

Zero do you have any recommendations?:)

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Or anybody for that matter.