M750 vs UCODE 8

Choose the Impinj M750 if you need cryptographic authentication and consistent user memory across your deployment. The M750 provides 64 bits of user memory in all configurations, 128 bits of EPC memory, and 32-bit TID. It operates across 860–960 MHz and supports EPC Class 1 Gen 2 with RAIN RFID compliance. The chip includes cryptographic authentication for secure tag verification, which goes beyond basic password protection. Impinj's BlockPermalock feature allows selective memory locking at the block level, giving granular control over which data fields remain modifiable. The M750 is designed for demanding retail and logistics environments where read reliability, authentication, and flexible memory management are critical. Choose the NXP UCODE 8 if you prioritize anti-counterfeiting features and need EPC Gen2v2 advanced functions. The UCODE 8 family offers two variants: standard UCODE 8 with 128-bit EPC and no user memory, or UCODE 8m with 96-bit EPC and 32 bits of user memory. Both versions include a 96-bit factory-locked TID (significantly larger than M750's 32-bit TID) and a 16-bit Brand Identifier that scrambles with RN16 to prevent cloning. The chip supports Gen2v2 Untraceable command for privacy protection, allowing EPC hiding in consumer scenarios. Memory Safeguard provides ECC, parity checking, and margin verification to ensure data integrity. The UCODE 8 operates from 840–960 MHz (20 MHz lower starting frequency than M750) and includes Permalock for permanent memory protection. This chip excels in brand protection applications where factory-programmed unique identifiers and Gen2v2 privacy features are essential.