{"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/em4425","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":"2026-11-01T19:49:42.936Z","chip":{"id":"a6a5ca96-3d8c-4764-a24b-d74cdfbe7917","slug":"em4425","name":"EM4425","manufacturer":"EM Microelectronic","frequency_category":"Dual-Frequency","short_description":"HF ISO 15693 + UHF ISO 18000-6C, 2Kbit EEPROM","manufacturer_url":"https://www.emmicroelectronic.com/sites/default/files/products/datasheets/4425-DS-02_0.pdf","frequency":"13.56 MHz (HF/NFC) and 860-960 MHz (UHF) / 125 kHz LF","protocol":"ISO/IEC 15693, ISO/IEC 18000-3 Mode 1, NFC Forum Type 5 Tag, ISO/IEC 18000-63, EPC Gen2v2, ISO/IEC 29167-10","memory":"2048-bit configurable non-volatile memory (HF USER memory, up to 480-bit EPC/UII encodings, UHF USER memory, optional Digital Signature: none/256b/384b/512b), 64-bit UID (HF), 96-bit TID (UHF)","interface":"RF (contactless) - dual frequency HF/NFC and UHF air interfaces, optional tamper loop inputs/outputs","temp_range":"-40°C to +85°C","form_factor":"Sawn wafer, 6-mil (152µm) thickness, gold bumps + polyimide, die size 1117.0 µm × 797 µm","security":"AES-128 crypto for NFC web-based authentication, Digital signature for authenticity, ISO 29167-10 (AES), Password-protected memory, Random ID option, Tamper Detection with alarm","use_cases":["supply-chain","brand-protection","asset-tracking"],"engineering_brief":"The EM4425 em|echo-V is a dual-frequency RFID/NFC transponder combining HF (13.56 MHz) and UHF (860-960 MHz) on a single die with shared 2048-bit configurable memory and common IC serial number. It supports ISO 15693, NFC Type 5, and EPC Gen2v2 protocols with read sensitivity up to -20dBm (UHF) and write sensitivity up to -14.5dBm. Features include AES-128 cryptography, digital signature authentication, tamper detection, 50pF on-chip resonant capacitor, minimum 100k write cycles endurance, and 50-year data retention, targeted at retail, product authentication, and supply chain applications.","enriched":true,"url_status":"ok","link_status":"invalid","last_checked":"2026-11-01T03:31:28.371+00:00","last_status_code":200,"last_content_type":"text/html; charset=UTF-8","created_at":"2026-06-14T16:30:56.111445+00:00","manufacturer_id":"64ce2a57-06a6-425b-84dc-f4bd9eec0c36","chip_type":"tag_ic","dual_interface":false,"is_family_hub":false,"meta_description":"EM4425 dual-frequency RFID chip with HF (13.56 MHz) ISO 15693/NFC Type 5 and UHF EPC Gen2v2, 2048-bit memory, AES-128 security for supply chain and authentication.","faq":[{"a":"The EM4425 is a dual-frequency chip supporting both HF at 13.56 MHz (ISO 15693, NFC Type 5) and UHF at 860-960 MHz (EPC Gen2v2) on a single die with shared memory.","q":"What frequencies does the EM4425 support?"},{"a":"The EM4425 contains 2048 bits of configurable non-volatile EEPROM memory, supporting up to 480-bit EPC/UII encodings for UHF and separate HF user memory areas, plus a 64-bit UID and 96-bit TID.","q":"How much memory does the EM4425 have?"},{"a":"Yes, the EM4425 features AES-128 cryptography for NFC web-based authentication and supports ISO 29167-10 authentication protocol, plus digital signature options (256/384/512-bit) for product authenticity verification.","q":"Does the EM4425 support AES encryption?"},{"a":"The EM4425 achieves read sensitivity up to -20 dBm on the UHF interface and write sensitivity up to -14.5 dBm, enabling flexible read ranges depending on antenna design and reader power.","q":"What is the read range sensitivity of the EM4425?"},{"a":"Yes, the EM4425 includes tamper detection capabilities with optional tamper loop inputs/outputs and alarm functionality to detect physical tampering or unauthorized access attempts.","q":"Does the EM4425 have tamper detection features?"},{"a":"The EM4425 offers a minimum of 100,000 write cycles endurance and 50-year data retention, making it suitable for long-term tracking and authentication applications.","q":"What is the data retention and endurance of the EM4425?"}],"standards":["iso-15693","iso-18000-63-epc-gen2","nfc-forum-type-5"],"alternatives":["1d35a8c6-887d-408f-8f69-4c2217a31821"],"no_direct_competitor":false,"long_form_html":null,"og_image_url":null,"canonical_url":"https://rfid-datasheet.com/chip/em4425"}}