{"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/em4200","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":"2026-11-01T19:49:42.437Z","chip":{"id":"a8f28a3e-1c38-4ca5-bc85-330ee6d3e9f1","slug":"em4200","name":"EM4200","manufacturer":"EM Microelectronic","frequency_category":"LF 125 kHz","short_description":"Read-only 128-bit, replaces EM4100/4102","manufacturer_url":"https://www.emmicroelectronic.com/sites/default/files/products/datasheets/em4200_ds.pdf","frequency":"100 to 150 kHz","protocol":"EM4100/4102 and EM4005/4105 compatible, ISO11785 (FDX-B)","memory":"128 bit laser programmed ROM (64 and 96 bit option available)","interface":"RF (contactless)","temp_range":"-40°C to +85°C","form_factor":"EMDFN-02 package, sawn wafer, bumped die (blister tape)","security":"Read-only, factory laser programmed","use_cases":["access-control","animal-identification","asset-tracking"],"engineering_brief":"The EM4200 is a read-only low-frequency (100-150 kHz) RFID chip with 128-bit laser-programmed ROM, designed as a direct replacement for EM4100/4102 and EM4005/4105. It features integrated resonant capacitors (0pF, 75pF, or 250pF options), on-chip rectifier and voltage limiter, and requires no external supply buffer capacitor. Multiple data encoding options are available: Manchester (32/64 RF clocks per bit), Biphase (32/64 RF clocks per bit), PSK (16 RF clocks per bit with RF/2 subcarrier), and FSK2 (50 RF clocks per bit), making it suitable for diverse applications including ISO11785 FDX-B animal identification and access control systems.","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":"EM4200 read-only 125 kHz RFID chip with 128-bit laser-programmed ROM, EM4100/4102 compatible, for access control and animal ID applications.","faq":[{"a":"The EM4200 is a read-only low-frequency RFID chip operating at 100-150 kHz (typically 125 kHz). It contains 128-bit laser-programmed ROM and serves as a direct replacement for EM4100/4102 and EM4005/4105 chips.","q":"What is the EM4200 RFID chip and what frequency does it operate at?"},{"a":"The EM4200 has 128 bits of laser-programmed ROM as standard, with 64-bit and 96-bit options also available. The memory is factory programmed and read-only, meaning it cannot be rewritten after manufacturing.","q":"How much memory does the EM4200 have?"},{"a":"Yes, the EM4200 is fully compatible with EM4100/4102 and EM4005/4105 protocols, making it a drop-in replacement that works with existing reader infrastructure designed for these legacy chips.","q":"Is the EM4200 compatible with EM4100 readers?"},{"a":"Yes, the EM4200 supports ISO11785 FDX-B protocol, making it suitable for animal identification applications. It offers multiple data encoding options including PSK and FSK2 formats required for animal tracking systems.","q":"Does the EM4200 support ISO11785 for animal identification?"},{"a":"The EM4200 supports multiple data encoding formats: Manchester (32/64 RF clocks per bit), Biphase (32/64 RF clocks per bit), PSK (16 RF clocks per bit with RF/2 subcarrier), and FSK2 (50 RF clocks per bit).","q":"What encoding formats does the EM4200 support?"},{"a":"The EM4200 integrates resonant capacitors (0pF, 75pF, or 250pF options) and includes an on-chip rectifier and voltage limiter, eliminating the need for an external supply buffer capacitor in most applications.","q":"Does the EM4200 require external capacitors?"}],"standards":["iso-11784-11785"],"alternatives":["76109825-1a84-479b-b7e6-292856f3f4d9","de787ff0-5b24-47b3-b28b-3d404e2eda36"],"no_direct_competitor":false,"long_form_html":null,"og_image_url":null,"canonical_url":"https://rfid-datasheet.com/chip/em4200"}}