Card production components
EPC Gen2 chip and antenna sheets
UHF RFID card inlays combine a passive EPC Gen2 chip and antenna for conversion into cards read by a UHF reader. Their EPC memory holds the card identifier; antenna design and the finished card materials determine RF performance. Compare the exact chip memory below and review the sheet examples before requesting a design for your reader region.
Technical overview
The chip holds data. The complete antenna and card assembly must work in the intended reader zone.
Chip specifications
Compare the exact IC, including legacy references. These are chip specifications; the quotation identifies the supplied chip, antenna and available sheet construction.
| Chip | EPC | TID | User | What this means for your card |
|---|---|---|---|---|
| NXP UCODE 8840–960 MHz IC inputManufacturer specs ↗ | 128 bits | 96 bits | 0 bits | Card identifiers that need up to 128 EPC bits. TID is factory-locked and includes a 48-bit serial number. UCODE 8m has a different memory allocation.Keep UCODE 8 distinct from 8m when specifying the EPC length and any extra on-chip data.Request NXP UCODE 8 quote → |
| NXP UCODE 9840–960 MHz IC inputManufacturer specs ↗ | 96 bits | 96 bits | 0 bits | Card systems using a 96-bit EPC identifier. TID is factory-locked and includes a 48-bit serial number. UCODE 9 is not the extended-memory 9xm.Check the identifier length before substituting this chip into a card design specified for 128 EPC bits.Request NXP UCODE 9 quote → |
| Impinj M730860–960 MHz carrierManufacturer specs ↗ | 128 bits | 96 bits | 0 bits | 128-bit EPC card designs using an M730 antenna assembly. Read-only TID: 32-bit IC identification + 16-bit extended header + 48-bit serialization.M730 and M750 have different EPC/user allocations. Check antenna matching as well as the memory map.Request Impinj M730 quote → |
| Impinj Monza R6860–960 MHz carrierLegacy / EOL referenceManufacturer specs ↗ | 96 bits | 96 bits | 0 bits | Legacy design comparison and replacement planning. Read-only TID contains IC identification, an extended header and serialization. This is R6, not R6-P.Impinj identifies Monza R6 as in the end-of-life process. Review a supported replacement and requalify the finished card.Review a replacement for Monza R6 → |
EPC is the programmable item identifier. TID identifies the IC and is not application storage. All four exact chips shown have no separate user memory; UCODE 8m, UCODE 9xm and Monza R6-P are different variants.
A reader application requiring the full 128-bit identifier needs an IC with that EPC capacity. UCODE 8 and M730 meet that capacity requirement; UCODE 9 and Monza R6 stop at 96 bits. TID memory cannot be added to EPC memory to make up the difference.
Antenna-sheet examples
The full antenna footprint and chip position need to fit inside each finished card. These original photos show actual patterns rather than a generic production illustration.
Partial sheet view
Historical photo: ACT Trinnovation Q4 2017, slide 18. Antenna arms and central connection areas are visible; cropped sheet edges prevent a full position count. It does not establish current sheet dimensions or availability.
24 pictured positions
A full sheet view from the existing UHF gallery shows 24 positions. The photograph does not identify the chip, antenna size or tuned band; use the approved drawing for those details.
Band & antenna
Chip RF specifications describe the IC under stated measurement conditions. They do not certify a particular card for every country or installation.
The antenna transforms the incoming RF signal into power for the passive chip. Its geometry and impedance match affect how much power reaches the chip. NXP publishes different impedance conditions for frequency, pad and assembly configurations; exchanging chips needs a design review.
UCODE 9: RF matching reference ↗Card layers, orientation, a hand or holder, and nearby metal can change the RF response. For a parking or personnel card, agree the intended read zone and test the completed sample there. Record the reader, antenna, settings and card position with the result.
The reader configuration and antenna band must fit the countries where the cards will be read. For multiple regions, evaluate the proposed design in each intended setup. A shipping destination alone does not identify the RF requirement.
Technical documents
The PDF brings together the exact-chip comparison, original source links and pictured sheet examples. The production drawing supplies the order-specific dimensions.
Download UHF technical reference ↓PDF · version 15 September 2026 · technical reference
Custom orders & samples
Start with the chip and reader configuration. Add the countries of operation, quantity and your card or sheet drawing on the inquiry page.
The quotation will identify the proposed antenna, chip, dimensions, sample charges, MOQ and lead time.
Sample ordering terms →UCODE 9 has 96 bits of EPC memory; UCODE 8 has 128 bits. Both have 96-bit factory-locked TID and no separate user memory. Check the EPC length and required commands, then qualify the proposed chip-and-antenna assembly in the finished card. A shared protocol alone does not make the complete designs interchangeable.
A chip datasheet cannot establish the reading distance of a finished card. Antenna geometry, operating band, card layers, reader power, orientation and the holder affect the result. Test the finished sample in its normal use position and record both successful reads and unwanted reads outside the intended zone.
A UHF-only EPC Gen2 inlay does not provide the 13.56 MHz NFC interface used for phone tapping. A card needing both functions requires an additional compatible HF design or a suitable combined architecture. Evaluate both interfaces in the same completed card.
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