{"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-424-dna-tagtamper","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":"2026-11-01T19:52:43.763Z","chip":{"id":"9d0f761d-1dbe-466f-b5bc-213fe67501ed","slug":"ntag-424-dna-tagtamper","name":"NTAG 424 DNA TagTamper","manufacturer":"NXP","frequency_category":"NFC","short_description":"NTAG 424 DNA with tamper-loop detection","manufacturer_url":"https://www.nxp.com/docs/en/data-sheet/NT4H2421Tx.pdf","frequency":"13.56 MHz","protocol":"ISO/IEC 14443-A, NFC Forum Type 4","memory":"416 bytes user memory","interface":"RF (contactless)","temp_range":"-25°C to +85°C","form_factor":"Wafer, FD (Flip-Chip Die)","security":"AES-128, SUN (Secure Unique NFC) authentication, originality signature, tamper-loop detection","use_cases":["brand-protection","healthcare-pharma","supply-chain"],"engineering_brief":"The NTAG 424 DNA TagTamper is an advanced NFC tag IC that extends the NTAG 424 DNA family with integrated tamper-loop detection capability. It features AES-128 encrypted Secure Unique NFC (SUN) message authentication, allowing each tap to generate unique encrypted URLs for server-side verification without requiring the tag to be online. The tamper-loop function monitors an external conductive connection and flags irreversible tamper status when the loop is broken, making it ideal for security seals on pharmaceutical packaging, premium products, and supply chain applications requiring evidence of first-opening or package integrity.","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":false,"is_family_hub":false,"meta_description":"NXP NTAG 424 DNA TagTamper NFC tag IC with AES-128, SUN authentication, 416-byte memory, and tamper-loop detection for pharmaceutical and brand protection.","faq":[{"a":"The NTAG 424 DNA TagTamper is used for tamper-evident security seals on pharmaceutical packaging, premium products, and supply chain applications. Its tamper-loop detection permanently flags when a conductive loop is broken, providing evidence of first-opening or package integrity breaches.","q":"What is the NTAG 424 DNA TagTamper used for?"},{"a":"The chip monitors an external conductive connection (tamper loop) and sets an irreversible tamper status flag when this loop is broken. This allows detection of package opening or seal tampering, with the status readable via NFC.","q":"How does NTAG 424 DNA TagTamper tamper detection work?"},{"a":"SUN (Secure Unique NFC) authentication generates unique AES-128 encrypted URLs on each tap that can be verified server-side without requiring the tag to be online. This enables secure product authentication and prevents cloning or replay attacks.","q":"What is SUN authentication on NTAG 424 DNA TagTamper?"},{"a":"The NTAG 424 DNA TagTamper has 416 bytes of user-accessible memory for storing application data, NDEF messages, and configuration parameters.","q":"How much memory does the NTAG 424 DNA TagTamper have?"},{"a":"The NTAG 424 DNA TagTamper operates at 13.56 MHz using the ISO/IEC 14443-A protocol and is compatible with NFC Forum Type 4 standards.","q":"What frequency does NTAG 424 DNA TagTamper operate at?"},{"a":"No, the tamper status is irreversible once the tamper-loop is broken. This one-time flag ensures permanent evidence of tampering, making it suitable for security seals and anti-counterfeiting applications.","q":"Can NTAG 424 DNA TagTamper tamper status be reset?"}],"standards":["iso-14443a","nfc-forum-type-4"],"alternatives":["0276ee78-144a-43f3-a532-5c4efa22fe8b","a48c6850-32cf-4cbd-b7cc-e06b7b911944","4191c449-4d3a-4e71-bc62-52f78fbdc2d0"],"no_direct_competitor":false,"long_form_html":null,"og_image_url":null,"canonical_url":"https://rfid-datasheet.com/chip/ntag-424-dna-tagtamper"}}