{"license":"Free for any use with attribution link to rfid-datasheet.com","citation":"RFID-Datasheet.com Chip Database — Roxtron","source":"https://rfid-datasheet.com/chip/ntag-i2c-plus","methodology":"https://rfid-datasheet.com/methodology","data_notes":"Includes automated enrichment. Null means unknown; last_checked is link availability, not technical review. Manufacturer documents govern specifications.","generated_at":"2026-11-01T19:50:59.794Z","chip":{"id":"8a96cd0b-6895-472f-9c61-557c90358381","slug":"ntag-i2c-plus","name":"NTAG I2C Plus","manufacturer":"NXP","frequency_category":"NFC","short_description":"NFC + I2C bridge, 1K/2K EEPROM, energy harvesting","manufacturer_url":"https://www.nxp.com/docs/en/data-sheet/NT3H2111_2211.pdf","frequency":"13.56 MHz","protocol":"ISO/IEC 14443-A, NFC Forum Type 2 Tag (Certification ID: 58514)","memory":"1k bytes (NT3H2111) or 2k bytes (NT3H2211) EEPROM user memory, 64 bytes SRAM buffer","interface":"RF (contactless NFC), I2C slave (up to 400 kHz)","temp_range":"-40°C to +105°C","form_factor":"XQFN8 (SOT902-3, 1.6x1.6x0.5mm), TSSOP8 (SOT505-1), SO8 (SOT96-1)","security":"32-bit password protection, ECC-based originality signature, configurable memory access control, negative authentication attempt limiting","use_cases":["industrial-iot","brand-protection","asset-tracking","healthcare-pharma"],"engineering_brief":"The NTAG I2C Plus (NT3H2111/2211) is a second-generation NFC-I2C bridge IC combining a passive NFC Forum Type 2 Tag interface (ISO/IEC 14443-A) with a contact I2C slave interface. It features 1K or 2K bytes of EEPROM, a 64-byte SRAM buffer for pass-through data transfer, and energy harvesting capability providing up to 5mA at 2V from the NFC field. Enhanced security includes 32-bit password protection, ECC-based originality signature, configurable memory access control from both interfaces, and field detection output for event signaling and synchronization.","enriched":true,"url_status":"ok","link_status":"valid","last_checked":"2026-11-01T03:31:28.371+00:00","last_status_code":200,"last_content_type":"application/pdf","created_at":"2026-06-14T16:30:56.111445+00:00","manufacturer_id":"6daaf1cc-d0e6-40c7-aba0-a08b4c3493fe","chip_type":"tag_ic","dual_interface":true,"is_family_hub":true,"meta_description":"NXP NTAG I2C Plus (NT3H2111/2211) NFC Forum Type 2 Tag IC with I2C interface, 1K/2K EEPROM, 64-byte SRAM buffer, energy harvesting, and ECC security.","faq":[{"a":"The NTAG I2C Plus is available in two variants: NT3H2111 with 1K bytes (1024 bytes) and NT3H2211 with 2K bytes (2048 bytes) of EEPROM user memory. Both variants include a 64-byte SRAM buffer for pass-through communication between the NFC and I2C interfaces.","q":"What memory sizes are available for the NTAG I2C Plus?"},{"a":"Yes, the NTAG I2C Plus features energy harvesting capability that provides up to 5mA at 2V from the NFC RF field. This power can be used to supply low-power microcontrollers or sensors when an NFC reader is in proximity.","q":"Can the NTAG I2C Plus power a microcontroller from NFC field energy?"},{"a":"The NTAG I2C Plus is the second-generation version with enhanced security features including ECC-based originality signature, negative authentication attempt limiting, and improved configurable memory access control from both NFC and I2C interfaces.","q":"What is the difference between NTAG I2C and NTAG I2C Plus?"},{"a":"The NTAG I2C Plus includes 32-bit password protection, ECC-based originality signature for product authentication, configurable memory access control from both NFC and I2C interfaces, and negative authentication attempt limiting to prevent brute-force attacks.","q":"What security features does the NTAG I2C Plus offer?"},{"a":"The NTAG I2C Plus operates as an I2C slave device supporting speeds up to 400 kHz (Fast-mode I2C). This allows efficient communication with microcontrollers and other I2C master devices.","q":"How fast is the I2C interface on the NTAG I2C Plus?"},{"a":"The 64-byte SRAM buffer enables pass-through data transfer between the NFC RF interface and the I2C interface, allowing real-time bidirectional communication without writing to EEPROM. This is useful for dynamic data exchange and sensor readings.","q":"What is the 64-byte SRAM buffer used for in NTAG I2C Plus?"}],"standards":["iso-14443a","nfc-forum-type-2"],"alternatives":["6d855bf0-6725-4a7f-8db5-d132ead2b6cb","3a1197bc-652a-422e-b9e9-29cb2e5a4e29","47b81e3f-ebcb-439f-9668-e932ea29ad97","1c458247-2296-4087-9df9-9a68bed667f5"],"no_direct_competitor":false,"long_form_html":null,"og_image_url":null,"canonical_url":"https://rfid-datasheet.com/chip/ntag-i2c-plus"}}