TMP431 SMbus

Newton

Other Parts Discussed in Thread: TMP431

It appears that the TMP431 temperature sensor does not fully support the SMBus interface specification. Specifically it doesn’t support address resolution protocol. (section 5.6 of SMBUS spec) http://smbus.org/specs/smbus20.pdf.

We are not able to plug two or more cards without getting an address conflict.

Is this correct?

If it is correct, Is the TMP431 has been updated recently to resolve this issue OR whether there is a very similar part that is a drop in replacement for this part that support the Address Resolution Protocol?

over 13 years ago

0 Chris Featherstone over 13 years ago

TI__Mastermind 25180 points

Newton,

I am currently looking into this and will get back to you shortly.

0 Chris Featherstone over 13 years ago

TI__Mastermind 25180 points

Newton,

What TMP431 devices do you have? There are four different addresses. Specifically see the table below.

If you are using two TMP431A devices then they will have the same address and therefore there will be an addressing issue.

0 Newton over 13 years ago in reply to Chris Featherstone

Expert 1125 points

TMP431C is being used.

regards

0 Chris Featherstone over 13 years ago in reply to Newton

TI__Mastermind 25180 points

Newton,

If I understand correctly, two TMP431C devices are being used on the communication bus. If this is the case it will cause an issue because they have the same address. My recommendation for using two TMP431's on the same bus is to use a TMP431B and a TMP431C. You can also use any combination of addressing except two of the same in the table from the datasheet above.

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TMP431 SMbus