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Compatibility of Substitute Components for Obsolete Parts in Custom Board Based on MB1389

rohithinthingstech
Associate II

Hello ST Community,

I am developing a custom board based on the MB1389 development board and have encountered some obsolete components used in the reference design. Specifically:

  1. NX3L1T3157GM,115 is now obsolete. I plan to use NX3L1T3157GMZ as a direct substitute.
  2. BGS13S4N9E6327XTSA1 is also obsolete, and I am considering BGS13SN8E6327XTSA1 as a replacement.

I’ve reviewed the datasheets for both substitutes and noted minor differences in parameters such as on-state resistance and channel matching in the NX3L1T3157 variant, and potential RF characteristics in the BGS13S4 replacement.

Could anyone from ST or the community advise if these substitutions are fully compatible with the MB1389 design, or if there are specific implications (e.g., signal integrity, RF performance, PCB footprint) that I should be aware of before finalizing the hardware?

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