496 bits EPC memory / 128 bits user memory / 896 bits total
128 bits EPC / 32 bits User / 64 bits TID / 32 bits Access + Kill passwords
Interface
RF (contactless)
RF (contactless backscatter)
Temp Range
-40°C to +85°C
-40°C to +85°C
Form Factor
Die/wafer for inlay manufacturing
Die/wafer for inlay integration
Security
32-bit access and kill passwords, EPC Gen2v2 authentication features, untraceable command support
32-bit access password, 32-bit kill password, TID memory with chip serialization, Impinj FastID for rapid inventory
Verdict
Choose Higgs-9 if you need maximum EPC memory capacity and EPC Gen2v2 security features. The Higgs-9 provides 496 bits of EPC memory compared to the M775's 128 bits, allowing storage of significantly longer product identifiers or serialized data within the EPC bank itself. With 896 bits total memory and 128 bits dedicated user memory, it offers more flexible data storage for applications requiring extended metadata. The chip implements EPC Gen2v2 authentication features and untraceable command support, making it suitable for applications demanding cryptographic authentication and enhanced privacy controls beyond basic password protection. This makes Higgs-9 appropriate for pharmaceutical tracking, luxury goods authentication, or supply chain applications where extended EPC numbering schemes and Gen2v2 security are specified.
Choose M775 if you prioritize rapid inventory speed and industry-standard item-level tagging with proven interoperability. The M775 implements Impinj's FastID capability, enabling significantly faster read rates during bulk inventory scanning compared to standard Gen2 operation. While it offers only 128 bits of EPC memory and 32 bits of user memory, this configuration matches the EPC Gen 2 ISO/IEC 18000-63 standard specifications used across most retail and logistics deployments. The 64-bit factory-programmed TID provides guaranteed unique chip serialization for authentication without requiring additional memory allocation. The M775 operates under the RAIN RFID alliance specifications, ensuring broad reader compatibility. Its enhanced read range and FastID performance make it ideal for high-speed retail inventory, warehouse automation, and apparel tagging where throughput and reader compatibility are more critical than extended memory capacity.
FAQ
What is the memory difference between Higgs-9 and M775?
Higgs-9 offers 496 bits of EPC memory and 128 bits of user memory (896 bits total), while M775 provides 128 bits of EPC memory and 32 bits of user memory. Higgs-9 has nearly four times the EPC storage capacity.
Does Impinj M775 support EPC Gen2v2 authentication?
No, the M775 implements standard EPC Class 1 Gen 2 with 32-bit access and kill passwords plus FastID, but does not support the Gen2v2 cryptographic authentication and untraceable commands available on the Higgs-9.
Which chip is better for high-speed retail inventory scanning?
The Impinj M775 is optimized for high-speed scanning with its FastID capability, which enables faster inventory reads than standard Gen2 operation. The Higgs-9 focuses on extended memory and Gen2v2 security rather than specialized inventory speed features.
Sourcing Higgs-9 or M775 in volume?
Roxtron builds custom RFID and NFC products around both Higgs-9 and M775. Tell us your project — quantities, form factor, timeline — and we'll come back within 24 hours with pricing and lead times.
