{"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/mifare-classic-ev1-4k","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":"2026-11-01T19:52:27.016Z","chip":{"id":"47a7e187-a51e-48c3-a292-87c9d3fbcb2b","slug":"mifare-classic-ev1-4k","name":"MIFARE Classic EV1 4K","manufacturer":"NXP","frequency_category":"HF 13.56 MHz","short_description":"4KB ISO 14443A, legacy access control","manufacturer_url":"https://www.nxp.com/docs/en/data-sheet/MF1S70YYX_V1.pdf","frequency":"13.56 MHz","protocol":"ISO/IEC 14443-A","memory":"4 kB (32 sectors of 4 blocks + 8 sectors of 16 blocks, 16 bytes per block)","interface":"RF contactless","temp_range":"-25°C to +70°C","form_factor":"Bumped die on sawn wafer (8\" 120μm, 8\" 75μm, 12\" 120μm), MOA4 module (SOT500-2), MOA8 module (SOT500-4)","security":"CRYPTO1 stream cipher, mutual three-pass authentication (ISO/IEC DIS 9798-2), two secret keys (A/B) per sector, 7-byte UID or 4-byte NUID, Random ID support","use_cases":["access-control","payments-transit","asset-tracking"],"engineering_brief":"The MIFARE Classic EV1 4K is a 13.56 MHz contactless smart card IC compliant with ISO/IEC 14443 Type A, offering 4 kB of EEPROM organized in 40 sectors with flexible access control. It features CRYPTO1 mutual authentication, dual-key per sector security, and supports both 7-byte UID and 4-byte NUID options with Random ID capability. Designed for fast transactions (<100 ms), it provides 10-year data retention, 200k write endurance, and operates from -25°C to +70°C. Available as bumped wafer die or contactless modules (MOA4/MOA8), it is widely deployed in legacy transport ticketing, access control, and loyalty applications.","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 MIFARE Classic EV1 4K: 13.56 MHz ISO 14443-A contactless IC with 4 KB EEPROM, CRYPTO1 authentication, dual-key security for legacy access control and transit.","faq":[{"a":"The MIFARE Classic EV1 4K has 4 KB (4096 bytes) of EEPROM memory organized in 40 sectors: 32 sectors with 4 blocks and 8 sectors with 16 blocks, with each block containing 16 bytes.","q":"How much memory does the MIFARE Classic EV1 4K have?"},{"a":"The MIFARE Classic EV1 4K offers 4 KB of memory (40 sectors) compared to 1 KB (16 sectors) in the 1K version, providing four times the storage capacity while maintaining the same CRYPTO1 authentication and ISO 14443-A protocol.","q":"What is the difference between MIFARE Classic 1K and 4K?"},{"a":"MIFARE Classic EV1 4K uses legacy CRYPTO1 encryption which has known vulnerabilities. It is not recommended for new high-security applications; consider MIFARE DESFire or MIFARE Plus for modern deployments requiring stronger cryptography.","q":"Is MIFARE Classic EV1 4K secure for new applications?"},{"a":"The MIFARE Classic EV1 4K typically achieves read ranges up to 10 cm depending on antenna design and reader power, operating at 13.56 MHz according to ISO/IEC 14443-A specifications.","q":"What is the read range of MIFARE Classic EV1 4K?"},{"a":"Yes, MIFARE Classic EV1 4K can be read by most Android NFC smartphones with native MIFARE Classic support, though iOS devices have limited or no support for MIFARE Classic technology.","q":"Does MIFARE Classic EV1 4K support NFC smartphones?"},{"a":"The MIFARE Classic EV1 4K offers 10-year data retention and 200,000 write cycle endurance, operating across an industrial temperature range of -25°C to +70°C.","q":"What is the data retention and write endurance of MIFARE Classic EV1 4K?"}],"standards":["iso-14443a"],"alternatives":["91c3a16f-2085-4f7a-898e-0c1b3113ba23"],"no_direct_competitor":false,"long_form_html":null,"og_image_url":null,"canonical_url":"https://rfid-datasheet.com/chip/mifare-classic-ev1-4k"}}