Required components NRF54L15

RE: Required components NRF54L15

JONATHAN LL — Wed, 06 Aug 2025 22:31:55 GMT

Hi James,

[quote user="James_Charles"]I searched for a matching component and found GRM033D80E225ME47D , which, to my knowledge, fully meets these specifications.[/quote]

Correct.

[quote user="James_Charles"]As for C11, I’m assuming that the ±0.01 pF tolerance is a typo[/quote]

Yes it is.

[quote user="James_Charles"]I looked into the BOM file from the DK board. There, I noticed that for C1 and C2, the component used is GRM033R61A225KE47D — an X5R, 10VDC, 10% tolerance component, which does not align with the stated requirements.[/quote]

Yes, the current DK version does not fully align with the reference schematic when it comes to the component listed in the BOM but the tolerance is a bit better on GRM033R61A225KE47D , however the termal characteristics are different here so if you need Extended operating temperature spec of 105C then you ned to use a component that is in line with that. So GRM033D80E225ME47D would be a better fit here.

https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/chapters/recommended_op_conditions.moonlight/doc/recommended_op_conditions.html

Regards,
Jonathan

RE: Required components NRF54L15

James_Charles — Wed, 06 Aug 2025 12:17:52 GMT

Hi Jonathan,

First of all, thank you for your response. I have indeed looked at the website you linked, and from that link, I downloaded the documentation for the DK board: nRF54L15 DK

I also just downloaded the documentation file you linked for the standalone NRF54L15 and noticed a difference. Highlighted in the documentation from the DevZone website, for C11, it specifies: 0.3 pF, Capacitor, C0G, ±0.01 pF, 50 V. However, in the XLS file from the download link, as well as in the DK board's BOM file, it states a tolerance of ±0.1 pF.
From this, I assume that the correct tolerance to use is ±0.1 pF.

Additionally, I noticed something else: in the downloadable documentation from Nordic for the standalone NRF54L15 (which you also referred to above), there is no BOM file included. I was, however, able to find one in the DK board documentation. Based on my research, most of the components meet the stated requirements. However, one thing stood out to me:
In all three documents — both XLS files and the DevZone website — the requirements for C1 and C2 are listed as:
2.2µF Capacitor, Ceramic, 2.2µF 2.5V X6T 0201, ±20%.

I searched for a matching component and found GRM033D80E225ME47D , which, to my knowledge, fully meets these specifications.
However, since I couldn't find a capacitor with the ±0.01 pF tolerance for C11, I looked into the BOM file from the DK board. There, I noticed that for C1 and C2, the component used is GRM033R61A225KE47D — an X5R, 10VDC, 10% tolerance component, which does not align with the stated requirements.

At this point, I’m unsure whether I should be sourcing components that match the requirements as closely as possible myself, or whether I should simply adopt the components listed in the DK board BOM.
As for C11, I’m assuming that the ±0.01 pF tolerance is a typo and that it should actually be ±0.1 pF.

I would appreciate your response and any advice or corrections if needed.

Best regards, and thank you in advance,
James

RE: Required components NRF54L15

JONATHAN LL — Wed, 06 Aug 2025 06:17:39 GMT

Hi,

Use the latest reference HW files available from the product page if possible but you can also use the DK as a reference, but make sure you have the latest DK version.
https://www.nordicsemi.com/Products/nRF54L15/Reference-layout?lang=en#infotabs
Sometimes one can be a bit ahead of the other.

From https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/chapters/ref_circuitry.html#ariaid-title2

Is this the list you reference where you see discrepancies?

Regards,
Jonathan