{"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/em4423","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":"2026-11-01T19:49:41.806Z","chip":{"id":"e0f495f7-e73e-4ec7-88e3-74baa026bde3","slug":"em4423","name":"EM4423","manufacturer":"EM Microelectronic","frequency_category":"Dual-Frequency","short_description":"Dual-frequency NFC + UHF RAIN RFID tag IC","manufacturer_url":"https://www.emmicroelectronic.com/sites/default/files/products/datasheets/4423-ds.pdf","frequency":"13.56 MHz (HF/NFC) and 860-960 MHz (UHF) / 125 kHz LF","protocol":"ISO/IEC 14443 Type A, NFC Forum Type 2, ISO/IEC 18000-63, EPC Gen2 V2","memory":"1920-bit (240 bytes) NFC user memory; 128-bit or 224-bit EPC; 160-bit or 64-bit USER memory; 96-bit TID; 32-bit Access/Kill passwords","interface":"RF (contactless dual-frequency: HF 13.56 MHz, UHF 860-960 MHz)","temp_range":"-40°C to +85°C","form_factor":"Sawn wafer, 3/6-mil thickness, gold bumps, die size 853 × 790 μm","security":"32-bit Access password, 32-bit Kill password, 4-byte and 2-byte LOGIN passwords, optional security timeout, PACK authentication, 32-byte digital signature support, anti-tearing protection, privacy mode","use_cases":["nfc-marketing","brand-protection","supply-chain","asset-tracking"],"engineering_brief":"The EM4423 em|echo is a dual-frequency transponder IC combining NFC (13.56 MHz) and UHF RAIN RFID (860-960 MHz) on a single die with a common 96-bit unique identifier shared across both interfaces. It offers configurable memory architectures (128-bit or 224-bit EPC encodings), 1920-bit NFC user memory, and comprehensive privacy features including Untraceable command support and password-protected access. The chip provides minimum 100k write cycles, 10-year data retention, read sensitivity up to -18 dBm (UHF) and -16 dBm typical at IC level, with anti-tearing protection, ACCESS counter, and field detection capabilities across both RF interfaces for retail, authentication, and smart marketing 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":"EM4423 dual-frequency NFC (13.56 MHz) + UHF RAIN RFID (860-960 MHz) tag IC with 1920-bit NFC user memory, shared 96-bit TID, and EPC Gen2 V2 support for omnichannel retail and authentication.","faq":[{"a":"The EM4423 is a dual-frequency tag IC operating at both 13.56 MHz (HF/NFC) and 860-960 MHz (UHF RAIN RFID) with a shared 96-bit unique identifier accessible from either interface.","q":"What frequencies does the EM4423 support?"},{"a":"The EM4423 provides 1920-bit (240 bytes) NFC user memory, configurable EPC memory (128-bit or 224-bit), USER memory (160-bit or 64-bit on UHF), and a 96-bit TID shared across both frequencies.","q":"How much memory does the EM4423 have?"},{"a":"The EM4423 supports ISO/IEC 14443 Type A and NFC Forum Type 2 on the 13.56 MHz interface, plus ISO/IEC 18000-63 (EPC Gen2 V2) on the UHF 860-960 MHz interface.","q":"What NFC protocols does the EM4423 support?"},{"a":"The EM4423 includes 32-bit Access and Kill passwords, 4-byte and 2-byte LOGIN passwords, PACK authentication, 32-byte digital signature support, Untraceable privacy mode, anti-tearing protection, and optional security timeout.","q":"What security features does the EM4423 offer?"},{"a":"The EM4423 achieves read sensitivity up to -18 dBm on the UHF interface and -16 dBm typical at IC level on the NFC interface, enabling extended read range on both frequencies.","q":"What is the read sensitivity of the EM4423?"},{"a":"The EM4423 supports a minimum of 100,000 write cycles with 10-year data retention, making it suitable for applications requiring frequent memory updates.","q":"How many write cycles does the EM4423 support?"}],"standards":["iso-14443a","nfc-forum-type-2","iso-18000-63-epc-gen2"],"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/em4423"}}