The EPC global UHF Generation 2 Standard allows the commercialised provision of mass adaption of UHF EPC technology for passive smart tags and labels. Main fields of applications will be especially the supply chain management and logistics for worldwide use with especial consideration of European and US regulations to ensure that operating distances of several meters can be realized.

The UCODE EPC G2 IC is a dedicated chip for passive, intelligent tags and labels supporting the EPCglobal Class 1 Generation 2 UHF RFID standard. It is especially suited for applications where operating distances of several meters and high anti-collision rates are required.

The UCODE EPC G2 IC is a product out of the NXP Semiconductors UCODE product family. The entire UCODE product family offers anti-collision and collision arbitration functionality. This allows a reader to simultaneously operate multiple labels / tags within its antenna field. A UCODE EPC G2 based label / tag requires no external power supply.

Its contactless interface generates the power supply via the antenna circuit by propagative energy transmission from the interrogator (read / write device), while the system clock is generated by an on-chip oscillator. Data transmitted from interrogator to label / tag is demodulated by the interface, and it also modulates the interrogator’s electromagnetic field for data transmission from label / tag to interrogator. A label / tag can be operated without the need for line of sight or battery, as long as it is connected to a dedicated antenna for the targeted frequency range. When the label / tag is within the interrogator’s operating range, the high-speed wireless interface allows data transmission in both directions.

Features and benefits
Key features
  • Interface fully compatible with UHF EPC G2 standard
  • Long-range solutions
  • Suitable for UHF RFID, allowing one IC to be used worldwide
  • Fast data rate
  • Forward link: 40 – 160 kbits/s
  • Return link: 40 – 640 kbits/s
  • 512 bit of on-chip memory
  • 96 bit EPC
  • 64 bit tag Identifier
  • 224 bit programmable user memory
  • 32 bit access password
  • 32 bit kill password
  • Runs on the same hardware infrastructure as the UCODE HSL and the UCODE EPC1.19

Key benefits

  • Tags / labels and readers available from various suppliers
  • First UHF EPC product operating worldwide
  • Highly advanced anti-collision resulting in highest identification speed
  • Reliable and robust RFID technology suitable for dense reader and noisy environment
  • Secure UHF communication; readers do not transmit EPC data
  • Broadest industry back-up – EPCglobal and ISO 18000-6C
  • Reader portfolio covers all regional demands

RF Interface Features

  • Contact-less transmission of data and supply energy (no battery needed)
  • Long-range operating distance
  • Operating frequency within the released operating bands from 860 MHz to 960 MHz
  • High data integrity: 16 bit CRC, framing
  • High anti-collision and inventory speed
  • Data rates:
    • R -> T: 40 – 160 kbps,
    • T -> R: 40 – 465 kbps (Divide ratio DR = 8) or 95 – 640 kbps (DR = 64/3)
  • Uses a slotted random anti-collision algorithm where the UCODE EPC G2 IC loads a random (or pseudo-random) number into a slot counter, decrement this slot counter based on interrogator commands, and reply to the interrogator when their slot counter reaches zero. Supports the full mandatory command set as well as optional and Customer commands according to the standard

Memory Features

  • 96 bit EPC numbers supported
  • 64 bit tag identifier (TID)
  • 32 bit kill password to permanently disable the tag
  • 32 bit access password to allow a transition into the secured transmission state
  • 224 bit user memory with free definable memory organization
  • Inventoried flags and selected flag support the handling of persistence information

Security Features

  • Lock mechanism (write protection) for individual passwords and individual memory banks allow for permanent lock (permalock) status of a password or memory bank.
  • Supply Chain Management
  • Asset Management
  • Container Identification
  • Pallet & Case Tracking


Product Features UCODE EPC Gen2
Total Memory  
Size [bit] 512
Write Endurance [cycles] 100 000
Data Retention [yrs] 10
Organisation 32 blocks á 2 bytes
According to EPC Class 1 Gen2
Frequency 860 – 960 MHz
Baudrate [kbit/s] up to 640
Anticollision slotted ALOHA
Operating Distance [m] up to 7
Unique Serial Number [byte] TID:64 bit incl. 32 bit
serial number
Write Protection bytewise
Access Keys 32-bit
Access Conditions Plain, Write
Encryption Algorithm  -
Special Features  
EAS yes
AFI  -
EPC 96 bit
TTF Modes  -
Destroy Command yes
Privacy Command  -
Sawn Wafer  -
Sawn Wafer (Au-Bumped) SL3ICS1001FW/
Other Packages FCP2, TSSOP8