CAN Transceiver

[Subramanian, Ramkumar]

Hi,

 

I have 3 ECM on a system; the controller board using ARM (SN65HVD234 transceiver), IO board using AT90CAN128(SN65HVD233 transceiver), and drawer board using AT90CAN128( SN65HVD233 transceiver). I was looking at the datasheet for 65HVD233 and the absolute max for Vcc was 0 -7V but the recommended is 3.3V typ.

1) All my logic on my IO board uses 5V including micro and I would like to use the same 5V on trasnceiver and avoid a extra regualator if possible. Would this cause any issue in communication as the other two nodes run there transceiver at 3.3V logic. I was follwing a thread on this forum based on this topic and if my understanding was right it will be ok to do it or do you recommend using a 5V transceiver from TI.

 

Thanks

Ram

[Steve Corrigan-2]

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Hi Ram,

 

The HVD233 will operate at 5-V, but since it is not tested by TI at that voltage, all the specs listed will be different – such as the timing specs or the receiver output voltage.  Plus it would be running at a higher temperature that listed in the power table.

 

I think it would be best to use the SN65HVD251.  Go to ti.com and type it into the search engine.  They’ll give you free samples.  I’ve used them together on the same bus for years without problems.

 

Cheers,

Steve C.

 

From: canlist-owner@... [mailto:canlist-owner@...] On Behalf Of Subramanian, Ramkumar
Sent: Tuesday, August 25, 2009 5:51 PM
To: canlist@...
Subject: [CANLIST] CAN Transceiver

 

Hi,

 

I have 3 ECM on a system; the controller board using ARM (SN65HVD234 transceiver), IO board using AT90CAN128(SN65HVD233 transceiver), and drawer board using AT90CAN128( SN65HVD233 transceiver). I was looking at the datasheet for 65HVD233 and the absolute max for Vcc was 0 -7V but the recommended is 3.3V typ.

1) All my logic on my IO board uses 5V including micro and I would like to use the same 5V on trasnceiver and avoid a extra regualator if possible. Would this cause any issue in communication as the other two nodes run there transceiver at 3.3V logic. I was follwing a thread on this forum based on this topic and if my understanding was right it will be ok to do it or do you recommend using a 5V transceiver from TI.

 

Thanks

Ram