What NFC IC from ST could be used for NFC communication in a FIDO2 authenticator?

[BBjör.2]

Hi,

Could anyone help us find the right NFC IC for our application?

Our team is developing a FIDO2 authenticator that should support the CTAP 2.0 NFC transport binding found in the CTAP 2.0 January 30 specification (I'm not allowed to post links as a new member to this forum).

Out current hardware has the M24SR IC and we're in doubt that this IC works for our product.

We need an IC that has support for data transport over NFC. We need to be able to take commands in the ISO7816 APDU format as well as Java Applet installation commands and pipeline that data through our MCU to a secure element. We also need to send data over NFC from our MCU.

Kind regards,

Benjamin

[Brian TIDAL · Accepted solution]

Hi,

The ST25R3918 / ST25R3916B support a card emulation mode that I believe can be used for your application. The ST25 Embedded lib provides a card emulation demo.

See also https://community.st.com/s/question/0D53W000006pppmSAA/is-a-possibile-product-st25r3916-to-implement-fido2-nfc for similar question.

Rgds

BT

[BBjör.2]

@Brian TIDAL_O​, thank you for your quick response.

Is there a smaller alternative to these ICs? We're somewhat concerned about the physical size of the two ICs linked above.

[Brian TIDAL]

Hi,

the ST25R95 also support the Card Emulation feature (but ST25391x is rather recommended for this feature). Anyway, if I am not wrong all those products (ST25R95 and ST25R3918/16B) use a VFQFPN - 32 pins, 5x5 mm package.

Rgds

BT

[BBjör.2]

@Brian TIDAL_O​, thank you! Your support has helped us a lot.