The introduction of the crystal oscillator applications in NFC

What's the model crystal oscillator applications in NFC devices? 

Recently, another important function of a smart terminal, the NFC function, is attracting more and more attention and interest. NFC refers to Near Field Communication. Devices that use NFC technology (e.g., cell phones) can exchange data in close proximity to each other and evolve from the integration of RFID and interoperability technologies.

Crystal oscillator applications in NFC affect the many functions. By integrating the functions of the inductive reader, inductive card, and peer-to-peer communication on a single chip, it enables mobile payment, electronic ticketing, access control, identification, data exchange, anti-counterfeiting, advertising, and other applications using smart mobile terminals, brings life to be easier and more convenient.

NFC Basic Working Principle

NFC is a short-range, high-frequency radio technology, which works in passive mode and active mode. In passive mode, the NFC initiating device provides the RF field and sends the data to the NFC target device.

what's the frequency of crystal oscillator applications in  NFC devices?

13.560MHz and 27.12MHz, and the common packages are SMD2520, SMD3225, and SMD2016. Based on this type of electronic product for the RF class, the stability and accuracy of the crystal frequency directly affect the performance of the NFC function. Therefore, in the crystal selection, in addition to the crystal of the electrical parameters to meet the requirements to be cautious, the crystal quality should not be taken lightly. 

Xtalong Electronics provides 13.560MHz and 27.12MHz crystal resonators for such package, more details just reach here: https://www.xtalong.com/en/list-7-64.html