Higgs-4 vs Monza R6 / R6-P

Alien Higgs-4 offers 128-bit EPC + 128-bit user memory with advanced security. Monza R6/R6-P optimized for high-speed reads with minimal/no user memory.

Side-by-side specs

Frequency

Higgs-4: 860–960 MHz UHF
Monza R6 / R6-P: 860-960 MHz

Protocol

Higgs-4: EPC Class-1 Generation-2 V1.2.0, ISO/IEC 18000-6C
Monza R6 / R6-P: RAIN RFID / ISO 18000-63 and EPCglobal Gen2v2 compliant

Memory

Higgs-4: 544 bits total: 128 bits EPC (NVM), 128 bits User (NVM), 64 bits Reserved (passwords, NVM), 96 bits TID, 64 bits UID; 320 bits customer-programmable
Monza R6 / R6-P: MR6: 96 bits EPC, no user memory; MR6-P: 96/128 bits EPC, 64/32 bits user memory

Interface

Higgs-4: RF (contactless, passive backscatter)
Monza R6 / R6-P: RF (contactless)

Temp Range

Higgs-4: -50°C to +85°C (storage), -30°C to +70°C (operating nominal)
Monza R6 / R6-P: —

Form Factor

Higgs-4: Flip-chip (589.5 µm die, gold bumps), SOT-323 (SMD), Strap (copper-on-Kapton, JEDEC MO-283)
Monza R6 / R6-P: MR6: die size 464.1 x 400 µm; MR6-P: die size 464.1 x 442 µm

Security

Higgs-4: 32-bit Access Password, 32-bit Kill Password, 64-bit factory-programmed unalterable UID, Dynamic Authentication anti-cloning fingerprint, BlockPermaLock (32-bit blocks)…
Monza R6 / R6-P: MR6-P: Access/Kill password, short-range mode

Spec	Higgs-4	Monza R6 / R6-P
Frequency	860–960 MHz UHF	860-960 MHz
Protocol	EPC Class-1 Generation-2 V1.2.0, ISO/IEC 18000-6C	RAIN RFID / ISO 18000-63 and EPCglobal Gen2v2 compliant
Memory	544 bits total: 128 bits EPC (NVM), 128 bits User (NVM), 64 bits Reserved (passwords, NVM), 96 bits TID, 64 bits UID; 320 bits customer-programmable	MR6: 96 bits EPC, no user memory; MR6-P: 96/128 bits EPC, 64/32 bits user memory
Interface	RF (contactless, passive backscatter)	RF (contactless)
Temp Range	-50°C to +85°C (storage), -30°C to +70°C (operating nominal)	—
Form Factor	Flip-chip (589.5 µm die, gold bumps), SOT-323 (SMD), Strap (copper-on-Kapton, JEDEC MO-283)	MR6: die size 464.1 x 400 µm; MR6-P: die size 464.1 x 442 µm
Security	32-bit Access Password, 32-bit Kill Password, 64-bit factory-programmed unalterable UID, Dynamic Authentication anti-cloning fingerprint, BlockPermaLock (32-bit blocks)…	MR6-P: Access/Kill password, short-range mode

Verdict

Choose Higgs-4 if you need substantial user memory and advanced security features for retail, inventory, or supply chain applications requiring item-level authentication. The Higgs-4 provides 128 bits of EPC memory and 128 bits of dedicated user memory (total 320 bits customer-programmable from 544 bits total), significantly more storage than the Monza R6 variants. Security is robust with 32-bit Access and Kill passwords, a 64-bit factory-programmed unalterable UID, Dynamic Authentication anti-cloning fingerprint technology, and granular memory protection via BlockPermaLock and BlockReadLock. Both chips operate on 860-960 MHz UHF and comply with EPC Class-1 Generation-2 and ISO/IEC 18000-6C standards, ensuring global interoperability. The Higgs-4's Fast-ID feature accelerates inventory reads, while the extra user memory accommodates serial numbers, manufacturing dates, or authentication data beyond the EPC. Choose Monza R6 or R6-P if your primary requirement is high-speed serialization at minimal cost, particularly for high-volume retail tagging where user memory is unnecessary or minimal. The base Monza R6 provides 96 bits of EPC memory with no user memory, ideal for basic item identification. The Monza R6-P variant offers flexibility with either 96-bit EPC plus 64-bit user memory or 128-bit EPC plus 32-bit user memory configurations. Both operate on 860-960 MHz and comply with RAIN RFID, ISO 18000-63, and EPCglobal Gen2v2 standards. The R6-P includes Access and Kill password protection and a short-range mode for privacy-sensitive applications, but lacks the Higgs-4's Dynamic Authentication and BlockPermaLock capabilities. Monza R6 chips are optimized for extremely fast read rates in high-throughput environments like retail point-of-sale and warehouse portals where maximum inventory velocity matters more than extended data storage or anti-cloning measures.

FAQ

What is the memory difference between Higgs-4 and Monza R6?

Higgs-4 provides 128 bits EPC and 128 bits user memory (320 bits total programmable). Monza R6 has 96 bits EPC with no user memory, while R6-P offers 96-bit EPC with 64-bit user or 128-bit EPC with 32-bit user memory.

Do both Alien Higgs-4 and Impinj Monza R6 support EPC Gen2?

Yes, both support EPC Gen2 standards. Higgs-4 complies with EPC Class-1 Gen-2 V1.2.0 and ISO/IEC 18000-6C, while Monza R6/R6-P complies with EPCglobal Gen2v2, ISO 18000-63, and RAIN RFID specifications.

Which chip has better anti-cloning security features?

Higgs-4 offers superior anti-cloning protection with Dynamic Authentication fingerprint technology, BlockPermaLock, BlockReadLock, and a 64-bit unalterable UID. Monza R6-P has only basic Access/Kill password protection and short-range mode; base R6 has no security features.

Sourcing Higgs-4 or Monza R6 / R6-P in volume?

Roxtron builds custom RFID and NFC products around both Higgs-4 and Monza R6 / R6-P. Tell us your project — quantities, form factor, timeline — and we'll come back within 24 hours with pricing and lead times.