# NXP Mifare Ultralight EV1 48 Bytes The **NXP Mifare Ultralight EV1 48 bytes** is a contactless smart card IC designed for cost-effective, limited-memory applications. From my personal experience working with NFC ticketing systems, I've found this chip to be exceptionally reliable for single-use or short-duration access control, such as event tickets or public transport passes. Its simplicity and low power consumption make it a go-to choice for projects where budget and basic functionality are primary concerns. ## Technical Specifications and Detailed Parameters ### Memory Structure and Organization The **NXP Mifare Ultralight EV1 48 bytes** provides 512 bits of user-available EEPROM memory, organized into 16 pages with 4 bytes per page. The memory is logically divided as follows: * **Pages 0-1:** Contain the 7-byte serial number (UID) and check bytes. This is factory-programmed and locked. * **Pages 2-14:** User memory (13 pages = 52 bytes). These pages are freely readable and writable. * **Page 15:** Contains lock bytes and one-time programmable (OTP) bytes for memory protection. ### Key Technical Indicators * **Chip Code/Type:** NXP MF0ULx1 (e.g., MF0UL1101) * **RF Interface:** ISO/IEC 14443 Type A, 13.56 MHz * **Communication Speed:** 106 kbit/s * **Data Retention:** Minimum 10 years * **Write Endurance:** Minimum 100,000 cycles * **Operating Distance:** Up to 100 mm (depending on antenna design and reader power) * **Dimensions (Chip Die):** Approximately 0.3 mm x 0.3 mm (exact dimensions are proprietary to NXP semiconductor manufacturing). * **Supply Voltage:** Operates entirely from the RF field (no battery required). > **Important Note:** The technical parameters provided above are for reference and based on publicly available datasheets. For precise, project-specific specifications, chip availability, or detailed integration support, you must **contact the backend administration** of TIANJUN. We provide authentic NXP components and tailored technical consultation. ## Personal Skill Application and Opinion My skill in embedded systems pr