NTAG 210μ

The NXP NTAG 210μ operates at 13.56 MHz and implements the ISO/IEC 14443 Type A modulation and anti-collision protocol. Communication uses 100% ASK modulation with Modified Miller coding from reader to tag and Manchester-coded load modulation (847.5 kHz subcarrier, OOK) from tag to reader. The chip supports ISO 14443-3A anti-collision using a 7-byte unique identifier (UID) and responds to standard Type A activation sequences (REQA/WUPA, anti-collision CASCADE LEVEL 1 and 2, and SELECT). Once selected, it operates as an NFC Forum Type 2 Tag with a 4-byte NDEF capability container at byte 12–15, enabling immediate compatibility with NFC-enabled smartphones and readers. Total EEPROM is 48 bytes, organized as 12 pages of 4 bytes each, with pages 4–15 user-accessible (64 bytes total user memory in the 16-page variant). A 32-bit password (PWD) and 16-bit PACK response provide basic access control, while the originality signature—a 32-byte ECC-based response computed over the UID and chip-specific keys—enables cryptographic authentication to verify genuine NXP silicon.

The NTAG 210μ is deployed extensively in ultra-compact NFC marketing tags embedded in printed media, smart labels, and consumer packaging where die size and cost are paramount. Its footprint (2.05 × 1.75 mm bare die) makes it ideal for event wristbands, woven labels, and small adhesive tags where larger chips physically cannot fit. Brand protection applications leverage the originality signature to authenticate products at tap without requiring backend infrastructure for basic validation. High-volume consumer goods—cosmetics, pharmaceuticals, toys, and apparel hang tags—adopt NTAG 210μ inlays when 64 bytes suffice for a short URL or static NDEF message. The chip competes with MIFARE Ultralight in price-sensitive applications but adds password protection and signature authentication absent in the baseline Ultralight. It is not suited for loyalty programs or dynamic data storage; for those, designers cross-shop to MIFARE Ultralight EV1 or NTAG 223 StatusDetect with larger memory and advanced features.

Programming follows NFC Forum Type 2 Tag operation: use READ (0x30) to retrieve 16 bytes (4 pages) per command, and WRITE (0xA2) to program a single 4-byte page. Page 0 contains the 7-byte UID (partially read-only, factory-programmed). Pages 4–15 are user-writable. To enable password protection, program the PWD (page 43) and PACK (page 44, first 2 bytes), then configure the AUTH0 byte (page 42, byte 3) to define the first protected page and set the PROT bit in the ACCESS byte (page 42, byte 0). Authentication uses PWD_AUTH (0x1B) command, supplying the 4-byte password; a correct PACK response grants access. The originality signature is retrieved via READ_SIG (0x3C, 0x00), returning 32 bytes of ECC-signature data over UID and NXP root keys; validate this server-side or with NXP's TagInfo app. Common pitfalls: forgetting to configure AUTH0 results in no protection despite password being written; writing NDEF messages that exceed 64 bytes causes silent truncation. The chip does not support counter, mirroring, or SUN authentication features found in NTAG 223 DNA StatusDetect. NFC-enabled smartphones universally read NTAG 210μ as a standard Type 2 Tag.

NTAG 210μ chips and inlays are stocked by major distributors including Avery Dennison Smartrac, Identiv, Beontag, and Confidex, typically in wet or dry inlay form factors (tags, labels, wristbands). Bare die are available for OEMs integrating directly into wearables or packaging via flip-chip or wire-bond assembly. Minimum order quantities vary: inlay converters often require 10,000–50,000 units for custom form factors, while pre-made labels may be available in reels of 1,000. Lead times range from stock (2–4 weeks for standard inlays) to 8–12 weeks for custom antenna designs. When requesting quotes, specify required read range (drives antenna size), substrate (PET, paper, fabric), and whether originality signature validation is needed (some converters pre-provision or lock configuration bytes). Cross-shop to MIFARE Ultralight EV1 if 32-bit counters or 128-byte memory are required, or to NTAG X DNA for AES authentication and tamper detection. For HF applications beyond NFC, consider ICODE SLIX2 under ISO 15693. Verify that the inlay converter provides genuine NXP silicon if signature authentication is mission-critical.