NXP Semiconductors has developed NTAG203 - NFC Forum Type 2 Tag compliant IC – to be used with NFC enabled devices according to NFC Forum technical specifications , according to NFC Forum recommendations or Proximity Coupling Devices (PCD), according to ISO/IEC 14443A . The communication layer (RF Interface) complies to parts 2 and 3 of the ISO/IEC 14443A standard. The NTAG203 is primarily designed for NFC Forum Type 2 Tag applications (i.e. Smart Advertisement, connection handover, Bluetooth simple pairing, WiFi Protected set-up, call request, SMS, goods and device authentication and others).
Features and benefits
RF Interface (ISO/IEC 14443A)
> Contactless transmission of data and supply energy (no battery needed)
> Operating distance: up to 100 mm (depending on field strength and antenna geometry)
> Operating frequency: 13.56 MHz
> Fast data transfer: 106 kbit/s
> High data integrity: 16-bit CRC, parity, bit coding, bit counting
> True anticollision
 >7 byte serial number (cascade level 2 according to ISO/IEC 14443-3)
EEPROM
 >168 bytes of total memory, divided in 42 pages (4 bytes each)
> 144 bytes of user r/w memory area, divided in 36 pages (4 bytes each)
> Field programmable read-only locking function per page for first 64 bytes
> Field programmable read-only locking function per block
> 32-bit user definable One-Time Programmable (OTP) area
> 16-bit counter
> Data retention of 5 years
> Write endurance 10000 cycles
Security
> Anti-cloning support by unique 7-byte serial number for each device
> 32-bit user programmable OTP area
> Field programmable read-only locking function per page for first 512 bits
 > Read-only locking per block for rest of memory
Cascaded UID
The anticollision function is based on an IC individual serial number called Unique IDentifier. The UID of the NTAG203 is 7 bytes long and supports cascade level 2 according to ISO/IEC 14443-3.
Anticollision
An intelligent anticollision function according to ISO/IEC 14443 allows to operate more than one card in the field simultaneously. The anticollision algorithm selects each card individually and ensures that the execution of a transaction with a selected card is performed correctly without data corruption resulting from other cards in the field.

.Near Field Communication RFID CARD (NFC) can be a wireless communication standard which helps two devices within a short range to ascertain a communication channel in a short time through radio waves from the 13.56 MHz frequency range. NFC can be a useful technology for data between two devices near one other. As it needs both the devices to get near the other person (lower than 10 cm), it is more secure thanother wireless technologies like Bluetooth and Wi-Fi. Hence, it could be described as simple and easy , secure tool for establishing quick two-way connections for data. As the biggest differentiating factor for NFC over RFID is that it's a two-way communication tool, one of many devices/cards could have a passive NFC tag which could decrease the cost but still behave in the same manner every other RFID tag.