# NFC NTAG215 Cards: The Ultimate Guide to Versatile Contactless Technology ## What Are NFC NTAG215 Cards? **NFC NTAG215 cards** are a specific type of passive NFC (Near Field Communication) tag based on NXP's NTAG21x series chip technology. They have become incredibly popular due to their balance of storage capacity, cost-effectiveness, and reliability. In my personal experience working with various NFC projects, from interactive art installations to practical business solutions, the NTAG215 has consistently been my go-to choice for its versatility and performance. ### Technical Specifications and Detailed Parameters of NFC NTAG215 Cards For developers, hobbyists, and businesses integrating this technology, understanding the precise specifications is crucial. Below are the detailed technical parameters for a standard NFC NTAG215 card. **Chip and Memory Specifications:** * **Chip Model:** NXP NTAG215 (Product Code: **NT3H1101W0FHKH** or similar variants). * **Memory Type:** EEPROM (Electrically Erasable Programmable Read-Only Memory). * **User Memory Size:** **504 bytes**. This is the programmable space available for your data (URLs, text, commands). * **Total Memory:** 540 bytes (includes 36 bytes for the unique serial number and configuration data). * **Data Retention:** Minimum of 10 years. * **Write Endurance:** 100,000 cycles. **Communication & Performance:** * **RF Interface:** ISO/IEC 14443 Type A, compliant at 13.56 MHz. * **Data Transfer Rate:** 106 kbit/s. * **Operating Distance:** Typically up to ~10 cm (4 inches), depending on the reader's power and antenna design. **Physical Dimensions (Standard Credit Card Format):** * **Dimensions:** 85.6 mm × 54.0 mm × 0.76 mm (ID-1/CR80 format). * **Material:** Typically PVC, but available in PET, paper, or biodegradable options. * **Weight:** ~5-6 grams. **Unique Features:** * **Unique 7-byte Serial Number (UID):** Factory-locked and unchangeable, perfect for authentication. * **Password Protection:** Capable of locking the memory with a 32-bit password. * **Fast Read/Write:** Supports fast reading of all 504 bytes. > **Important Note:** The technical parameters provided a