UCODE 8
The NXP UCODE 8 is an UHF 860–960 MHz RFID tag IC, with UCODE 8: 128-bit EPC, 0-bit User / UCODE 8m: 96-bit EPC, 32-bit User; 96-bit TID (factory-locked), 64-bit Reserved (32-bit Kill + 32-bit Access password), operating at 840–960 MHz under EPC Gen2v2 (ISO/IEC 18000-63).
EPC Gen2 + Brand Identifier anti-counterfeiting
Full Specifications
| Manufacturer | NXP |
|---|---|
| Frequency Category | UHF 860–960 MHz |
| Frequency | 840–960 MHz |
| Protocol | EPC Gen2v2 (ISO/IEC 18000-63) |
| Memory | UCODE 8: 128-bit EPC, 0-bit User / UCODE 8m: 96-bit EPC, 32-bit User; 96-bit TID (factory-locked), 64-bit Reserved (32-bit Kill + 32-bit Access password) |
| Interface | RF (contactless) |
| Temperature Range | -40°C to +85°C |
| Form Factor | Wafer (8" stealth/12" conventional/plasma dicing, 120 µm thick, Large Pads: ~465×475 µm die, polyimide spacer) |
| Security | 32-bit Access password, 32-bit Kill password, Brand Identifier (16-bit factory-locked, scrambled with RN16 for anti-counterfeiting), Untraceable (EPC Gen2v2), Memory Safeguard (ECC, parity, margin check), Permalock |
Engineering Brief
The UCODE 8/8m are high-performance UHF RAIN RFID chips supporting EPC Gen2v2 with read sensitivity of -23 dBm and write sensitivity of -18 dBm. They feature a factory-locked 16-bit Brand Identifier for anti-counterfeiting (scrambled during transmission), Self Adjust for automatic sensitivity tuning, and Memory Safeguard (ECC, parity, margin check) for data integrity. Delivered on 8" or 12" wafers with Large Pads and 10 µm polyimide spacer, they support single-slit antenna assembly, pre-serialized 96-bit EPC, and advanced features like EPC+TID fast read, Product Status Flag (EAS), and Untraceable for privacy.
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Typical Applications
Standards & Compliance
Frequently Asked Questions
What is the read sensitivity of the NXP UCODE 8?
The UCODE 8 has a read sensitivity of -23 dBm and write sensitivity of -18 dBm, enabling long-range RAIN RFID applications in the UHF 840–960 MHz band.
What is the difference between UCODE 8 and UCODE 8m memory?
UCODE 8 features 128-bit EPC with 0-bit User memory, while UCODE 8m has 96-bit EPC with 32-bit User memory. Both include 96-bit factory-locked TID and 64-bit Reserved memory (Access and Kill passwords).
How does the UCODE 8 Brand Identifier prevent counterfeiting?
The UCODE 8 includes a factory-locked 16-bit Brand Identifier that is scrambled with RN16 during transmission, providing cryptographic protection against tag cloning and unauthorized replication.
Does the UCODE 8 support EPC Gen2v2 Untraceable?
Yes, the UCODE 8 supports the EPC Gen2v2 Untraceable feature, allowing selective hiding of EPC, TID, or User memory to protect consumer privacy during post-sale scenarios.
What is Memory Safeguard in the UCODE 8?
Memory Safeguard combines ECC (error-correcting code), parity checks, and margin checks to ensure data integrity and reliability across the chip's lifetime, even in harsh environments.
What wafer form factors are available for UCODE 8?
UCODE 8 is delivered on 8-inch or 12-inch wafers with Large Pads and a 10 µm polyimide spacer, optimized for single-slit antenna assembly in high-volume inlay manufacturing.
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