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Casper van Doorne
Casper van Doorne
Associate
September 22, 2020
Solved

"NC" pins on ST25R95-VMD5 Not Connected or Do Not Connect?

  • September 22, 2020
  • 2 replies
  • 765 views

Hi Everyone,

I'm designing an application with the ST25R95. It has several pins that are labeled as "NC".

To improve the PCBA lay-out, particularly the GND plane under the IC, I want to connect as many as possible pins to GND.

My Question:

Can the "NC" pins of the ST25R95 be tied to GND (Not Connected pins) or should I leave these pins floating (Do Not Connect pins) ?

Thanks in advance for sharing your insights.

Casper van Doorne

Pink Fluffy Unicorns BV

    This topic has been closed for replies.
    Best answer by Brian TIDAL

    Hi,

    on the X-NUCLEO-NFC03A1 board, the NC pins 3/4/7/10/11/23-28 are connected to GND. See schematics in UM2479.

    Same for the CR95HF transceiver board in the M24LR-DISCOVERY kit.

    Rgds

    BT

    2 replies

    Brian TIDAL
    Brian TIDALBest answer
    ST Technical Moderator
    September 22, 2020

    Hi,

    on the X-NUCLEO-NFC03A1 board, the NC pins 3/4/7/10/11/23-28 are connected to GND. See schematics in UM2479.

    Same for the CR95HF transceiver board in the M24LR-DISCOVERY kit.

    Rgds

    BT

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    Casper van Doorne
    Casper van DoorneAuthor
    Associate
    September 22, 2020

    Well Brian, I guess that answers my question.

    Thank you very much for your contribution!

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