TMP464: TMP464 device ID

Guillaume Ascheri

Part Number: TMP464

Dear TI E2E team,

We use a TMP464 on our board and for software purpose we have to check the TMP464 Device ID though the two-wire bus.

On our board, device ID read at address FFh is 0x1468.

This value is unexpected : device ID should be 0x0464 (see datasheet SBOS835B and in case of device revision level, the datasheet says that the most significant byte of the Device ID register identifies the TMP464 device revision level (so it could be 0x1464, 0x2464 etc… see chapter 7.6.1.14 of SBOS835B)

Note that
- The device marking code is T464 TI 8BAC48
- Values on other register are OK (Local temperature, Manufacturer ID…)

Could you tell me if Device ID 0x1468 is correct or not for this device ?

Thank you very much

Guillaume

over 4 years ago

0 David Vaseliou over 4 years ago

TI__Expert 6820 points

Hi Guillaume,

Can you please send me screen shot of the I2C transaction from the read of Device ID register (0xFF).

Thanks,

0 Guillaume Ascheri over 4 years ago in reply to David Vaseliou

Prodigy 50 points

Hi David,

Here is the I2C osccilogram : from the read device ID Register (0xFF) :

Here is my frame analysis :

Here is the Unix terminal result of the I2C read at Address 0xFF :

Please note that the ADD pin is tied to V+ on our schematic.

BR,

Guillaume

0 David Vaseliou over 4 years ago in reply to Guillaume Ascheri

TI__Expert 6820 points

Hi Guillaume,

I checked on the device we have here and looks like the datasheet is incorrect. Device should read 0x1468.

Thanks,

0 Guillaume Ascheri over 4 years ago in reply to David Vaseliou

Prodigy 50 points

Hi David,

Thank you very much for your feedback.

BR,

Guillaume

0 Guillaume Ascheri over 4 years ago in reply to David Vaseliou

Prodigy 50 points

David,

Last questions :

Could the datasheet be updated ? When will it be available ?

Thanks,

BR,

Guillaume

0 David Vaseliou over 4 years ago in reply to Guillaume Ascheri

TI__Expert 6820 points

Guillaume,

I will update the datasheet with correct Device ID. The process for updating datasheet can take some time, but I will try to get this one through as soon as possible.

Thanks,

0 Guillaume Ascheri over 4 years ago in reply to David Vaseliou

Prodigy 50 points

Hi David,

Thank you again for your feedback.

Could you please notify me (by replying to this post ?) about the datasheet update ?

BR,

Guillaume

0 David Vaseliou over 4 years ago in reply to Guillaume Ascheri

TI__Expert 6820 points

Guillaume,

Yes, I will notify you when the datasheet is updated by replying to this post.

Thanks,

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TMP464: TMP464 device ID