LMK00105: Requirement of power sequence and absolute maximum rating description

Kawai

Guru 19785 points

Part Number: LMK00105

Hi Team,

Please allow me to ask you about the power sequence requirement for LMK00105. I found following descriptions in the datasheet which conflicts each other.

Regarding the "NOTE" below, it points out that there is a ESD protection diode between 1.8V and 3.3V. However, regarding the "Absolute Maximum Ratings" for Vddo, MAX is NOT "Vdd + 0.3V".

Which is true and which is wrong ?

Thanks in advance.

Best Regards,

Kawai

over 8 years ago

0 Tim Chao Li over 8 years ago

TI__Expert 4415 points

Hi Kawai-san,

I am looking into this question- the device designer is out of office at the moment but I will follow up and post a reply when I get a response.

Regards,
-Tim

0 Kawai over 8 years ago in reply to Tim Chao Li

Guru 19785 points

Hi Tim-san,

Thanks for your support.
We look forward to hearing from you.

Best Regards,
Kawai

0 Kawai over 8 years ago in reply to Kawai

Guru 19785 points

Hi Tim-san,

Do you have any update on this question ?

Best Regards,
Kawai

0 Tim Chao Li over 8 years ago in reply to Kawai

TI__Expert 4415 points

Hi Kawai-san,

Vddo Max should be Vdd to prevent turning on the ESD circuitry. I will note that this datasheet clarification is needed so that it will be updated with the next revision.

Regards,
-Tim

0 Kawai over 8 years ago in reply to Tim Chao Li

Guru 19785 points

Hi Tim-san,

Thanks for the answer.
I understood that Absolute Maximum Ratings for Vddo pin is from -0.3 to probably (Vdd + 0.3) .

Best Regards,
Kawai

Clock & timing

Clock & timing forum

LMK00105: Requirement of power sequence and absolute maximum rating description