NFCのトピックMFRC630 and CLRC663 Interchangeability?

MFRC630 and CLRC663 Interchangeability?

jof — Sun, 28 Apr 2019 08:29:23 GMT

Currently our product uses two pcs of CLRC663. They are matched to 50Ohms impedance, so they will not make use of the "high current" capability of the CLRC663. For the furture, we want to save on production costs and use just one CLRC663 (needed because it must support 14443 and 15693) and one MFRC630 (second reader only needs mifare).

I succesfully tested our own library on both products and they seem to work, even with "changeable" uid chip types very

well. So it wouldn't be a software thing. My guess is that the MFRC630 is just a different firmware than CLRC630, to not support ISO15693

Footprint and pinout are the same

The only thing i wonder is about the matching.

Could the CLRC663 which is matched for mifare, replaced by a drop-in MFRC630 without changing the matching network?

Re: MFRC630 and CLRC663 Interchangeability?

jezo — Wed, 09 Sep 2026 15:38:18 GMT

I assume you've already found the answer, but for anyone who might find this, there is an application note ( https://www.nxp.com/docs/en/application-note/AN11256.pdf) which says that no changes need to be made.

I am also working on a project which will use the MFRC630, but for development, I'm using CLRC663 because there is a board for it. I shall add a post here after finishing the project, confirming whether the migration went as smoothly as the application note says.

Re: MFRC630 and CLRC663 Interchangeability?

Tomas_Parizek — Thu, 10 Sep 2026 14:02:53 GMT

Hello @jof ,

Yes, the ICs are "tuning" compatible. The silicon is the same but MFRC660 supports only MIFARE technology (ISO 14443, Type A) while the CLRC663 supports all technologies as Type A, Type B, ISO15693...

Tomas