The NTAG I2C plus combines a passive NFC interface with a contact I2C interface. Designed to be the perfect enabler for NFC in home-automation and consumer applications, this connected NFC tag is the fastest, least expensive way to add tap-and-go connectivity to just about any electronic device.
These devices maintain full backward compatibility with first-generation NTAG I2C, while adding advanced features for password protection, full memory-access configuration from both interfaces, and an originality signature for protection against cloning.
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## Features
### Key features
* Pass-through mode
* Up to 40 kbit/s using 64 byte SRAM buffer
* Energy harvesting
* Up to 15 mW
* Wake up host with field detect pin
* Password protection
* 32-bit password to restrict access to EEPROM and SRAM
* Originality signature
* 32-byte elliptic curve based originality signature to protect cloning
### NFC interface
* Interoperability
* Fully ISO/IEC 14443 A compliant
* Fully NFC Forum Type 2 Tag compliant
* One to one backward compatible to NTAG I2C
* Uniqueness
* 7-byte Unique Identifier (according to ISO/IEC 14443-3)
* GET_VERSION command for easy identification of chip type and supported features
* 32-byte originality signature
* ISO/IEC 14443 and NFC Forum Type 2 Tag features
* Operating distance up to 100 mm
* True anti-collision
* 4-byte write operation in < 4.8 ms to EEPROM and < 0.8 ms to SRAM
* 64-byte write operation (FAST_WRITE) in < 6.1ms to SRAM
### I2C interface
* Features
* I2C slave interface supports up to 400 kHz
* 16-byte write operation in < 4.5 ms to EEPROM and < 0.4 ms to SRAM
* Device maybe used as standard I2C EEPROM or I2C SRAM
### Security
* NFC Forum Type 2 Tag features
* 7-byte Unique Identifier
* One time programmable Capability Container
* Read-only locking
* Special features
* Elliptic curve based originality signature
* 32-bit password protection
* Protected data can be safeguarded against limited number of negative password authentication attempts
* Access restriction from I2C perspective
* Pass-through and mirror mode operations may be password protected
### Memory
* Built-in memory
* 1912 or 888-bytes freely available user memory area
