{"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/em4102","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":"2026-11-01T19:49:41.809Z","chip":{"id":"b91df667-da77-4b67-8a72-75cb86edbd4e","slug":"em4102","name":"EM4102","manufacturer":"EM Microelectronic","frequency_category":"LF 125 kHz","short_description":"Read-only 64-bit contactless ID device, EM4100 successor","manufacturer_url":"https://cdn.united-access.com/wp-content/uploads/2021/07/EM4102-1.pdf","frequency":"100 - 150 kHz","protocol":"EM4102 proprietary format (Manchester, Biphase, or PSK encoding)","memory":"64 bits total (factory laser-programmed, read-only)","interface":"RF (contactless)","temp_range":"-40°C to +85°C","form_factor":"Die (1016 × 1295 µm), wafer, sawn wafer, sticky tape, waffle pack, or card form","security":"None (read-only device with factory-programmed unique ID)","use_cases":["animal-identification","access-control","asset-tracking"],"engineering_brief":"The EM4102 is a read-only 125 kHz LF RFID chip with 64 bits of factory laser-programmed memory. It is powered entirely by an external coil in an electromagnetic field and transmits data via load modulation using Manchester, Biphase, or PSK encoding at 64, 32, or 16 RF cycles per data bit. The chip integrates a full-wave rectifier, resonance capacitor (78 pF), supply buffer capacitor, and voltage limiter, requiring only an external coil (~20.8 mH for 125 kHz) to function. It is designed for animal identification and industrial transponder applications with ultra-low power consumption and very small die size suitable for implantation.","enriched":true,"url_status":"ok","link_status":"invalid","last_checked":"2026-11-01T03:31:28.371+00:00","last_status_code":530,"last_content_type":"text/plain; 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":"EM4102 read-only 125 kHz LF RFID chip with 64-bit factory-programmed ID, Manchester/Biphase/PSK encoding for animal identification and access control.","faq":[{"a":"The EM4102 has 64 bits of factory laser-programmed, read-only memory that stores a unique ID. This memory cannot be rewritten or modified after manufacturing.","q":"What is the memory capacity of the EM4102 RFID chip?"},{"a":"The EM4102 operates in the low frequency (LF) band from 100 to 150 kHz, with typical operation at 125 kHz. It requires an external coil of approximately 20.8 mH for 125 kHz resonance.","q":"What operating frequency does the EM4102 use?"},{"a":"No, the EM4102 is a fully passive device powered entirely by the electromagnetic field from an external reader coil. It has no battery and integrates a full-wave rectifier and voltage regulation circuitry.","q":"Does the EM4102 require a battery?"},{"a":"The EM4102 supports Manchester, Biphase, or PSK (Phase Shift Keying) encoding methods. Data transmission rates are configurable at 64, 32, or 16 RF cycles per data bit using load modulation.","q":"What data encoding methods does the EM4102 support?"},{"a":"No, the EM4102 is a read-only device with factory laser-programmed memory. The 64-bit unique ID is permanently written during chip production and cannot be altered.","q":"Can the EM4102 memory be reprogrammed after manufacturing?"},{"a":"The EM4102 is designed for animal identification (pet tagging and livestock tracking), access control systems, and industrial transponder applications. Its small die size makes it suitable for implantable applications.","q":"What are the typical applications for the EM4102 chip?"}],"standards":["iso-11784-11785"],"alternatives":["3d5557e0-57db-43d5-81b6-19e1b2a93cab","a9e71908-817a-43b2-a0ce-0d180be72f27"],"no_direct_competitor":false,"long_form_html":null,"og_image_url":null,"canonical_url":"https://rfid-datasheet.com/chip/em4102"}}