MIFARE Ultralight EV1

MF0UL11 provides 384 bits of user memory (640 bits total), while MF0UL21 offers 1024 bits of user memory (1312 bits total). Both share the same security features including password protection, counters, and originality signature.

The EV1 features an ECC-based originality signature that allows readers to cryptographically verify the chip's silicon authenticity, confirming it is a genuine NXP product and not a counterfeit.

The chip includes three independent 24-bit one-way counters with anti-tearing support, ideal for tracking usage in ticketing applications (e.g., ride counts). Counters can only increment and support 1,000,000 write cycles with <10 ms operation time.

Yes, it features optional 32-bit password protection with configurable access control for read/write or write-only operations. It also supports negative authentication attempt limiting to prevent brute-force attacks.

Read range depends on antenna design and reader power, but as an ISO 14443-A Type 2 chip operating at 13.56 MHz, typical range is 2-10 cm with standard NFC readers and appropriate tag antenna matching (17 pF or 50 pF variants available).

Standard memory supports 100,000 write cycles with 10-year data retention. The three one-way counters are rated for 1,000,000 write cycles, making them suitable for high-usage ticketing applications.