FM11RF08 vs MIFARE Classic EV1 4K

Choose the FM11RF08 if you need a cost-effective MIFARE Classic 1K compatible solution with 1024 bytes (8 Kbits) of EEPROM memory organized in 16 sectors of 4 blocks each, where each block contains 16 bytes. This Shanghai Fudan chip operates at 13.56 MHz using ISO/IEC 14443-A protocol and implements mutual 3-pass authentication with stream cipher encryption and dual keys (Key A and Key B) per sector. It functions as a clone compatible with the MIFARE Classic 1K command set, making it suitable for applications where legacy system compatibility is required and 1KB storage is sufficient, though buyers should verify acceptance in their specific infrastructure since some systems explicitly reject non-NXP chips based on manufacturer identification bytes. Choose the MIFARE Classic EV1 4K if you require the genuine NXP product with 4096 bytes of memory across 40 sectors (32 sectors of 4 blocks plus 8 sectors of 16 blocks, all with 16-byte blocks) and need guaranteed compatibility with existing MIFARE infrastructure. This chip provides CRYPTO1 stream cipher authentication conforming to ISO/IEC DIS 9798-2, dual secret keys (A/B) per sector, and offers both standard 7-byte UID and 4-byte NUID options plus Random ID support for enhanced privacy. The EV1 4K is the appropriate choice for access control deployments requiring four times the storage capacity of the FM11RF08, authentic NXP silicon for security-critical applications, or systems that validate manufacturer credentials during card transactions.