EM4124 vs UCODE G2iL / G2iL+

Choose EM4124 if you need a cost-optimized EPC Gen2 solution for basic item-level tagging with minimal security requirements. The EM4124 offers 96-bit EPC memory, 32-bit kill and access passwords, and a factory-locked 64-bit TID for authentication. It operates across the full 860–960 MHz UHF band and complies with ISO/IEC 18000-6C. With 176 bits of user-programmable memory plus the 64-bit read-only TID, it provides essential Gen2 functionality without advanced features. The optional deactivate function allows permanent muting for privacy. This chip suits high-volume applications like retail apparel tagging, library management, or logistics where basic read/write capability and standard Gen2 interoperability are sufficient, and per-unit cost is the primary concern. Choose UCODE G2iL or G2iL+ if you require extended EPC storage, advanced security, or tamper detection capabilities. The G2iL family provides 128-bit EPC memory (33% more than EM4124), bank-wise read protection for both EPC and TID banks, a Product Status Flag for lifecycle tracking, and Real Read Range Reduction (4R privacy mode) to limit unauthorized scanning. The G2iL+ variant adds Tag Tamper Alarm functionality to detect physical tampering events, crucial for pharmaceutical authentication, high-value goods, or supply chain integrity applications. Both variants support EPC Gen2 v1.2.0 and operate from 840–960 MHz (extending 20 MHz lower than EM4124). The G2iL+ also offers an optional external supply mode via a VDD pin for applications requiring sensor integration or extended functionality. With 20-year data retention and a 32-bit unique serial number within the 64-bit TID, these chips suit brand protection, anti-counterfeiting, and applications demanding higher security than basic password protection alone.