SK-AM69: Question about the footprint used by sk-am69

Does NFM15HC105D0G use the NFM15CC footprint? - Yes
Does NFM18HC106D0G use the NFM18C footprint? - Yes

Please clarify what conflicts with Murata's recommendation.

Hi Robert

Murata's recommendation:

The sizes are slightly different. To avoid interference, it is recommended to use different footprints.

So the customer wants to know why sk-am69 uses such a design.

Thanks

Daniel

I don't see any difference is footprint from recommendation in data sheet.  Can you please provide specifics of your concern?  Which measurement(s) are you refering?

Hi Robert,

It seems that it cannot be used directly
Which one does SK-AM69 use?

Thanks

Daniel

Recommendation is to use latest recommended PCB footprint from manufacturer (Murata).  We started using these devices long ago (2018) and possible manufacturer has updated footprint (while TI still using initial created PCB footprint).  I'm not aware of any build issue with our EVMs - but recommended using latest manufacturer recommendatiion.

Hi Robert,

From Murata's reply, the recommended footprint is NFM15HC
Why did TI create NFM15CC? Why did TI deliberately use the materials of NFM15HC and NFM18HC with the footprint of NFM15CC and NFM18CC?
In addition, if the EVM is placed according to Murata's suggestion, all parts will interfere with each other and there will be problems as follows

Thanks

Daniel

The NFM15HC footprint has significant tolerances and can be made to be similar to the NFM15CC footprint you provided.

The overall HC length (x-direction in my image) can range from 1.15 to 2.35mm.  The 1.3mm dimension from CC is within that dimension.

The overall HS width (y-direction in my image) can range from 0.65 to 1.8fmm.  The 0.75mm dimension from the CC is within that dimension.