MIFARE Ultralight EV1 vs ICODE SLIX2
MIFARE Ultralight EV1 offers 128 bytes memory with 32-bit password security, making it ideal for limited-use transit tickets, loyalty tokens. ICODE SLIX2 provides 2560 bits with 64-bit password security, suited for library management, industrial tracking, pharmaceutical.
MIFARE Ultralight EV1
ICODE SLIX2
MIFARE Ultralight EV1 vs ICODE SLIX2
MIFARE Ultralight EV1 and ICODE SLIX2 both operate at 13.56 MHz, but they implement different ISO standards and serve completely different use cases. Ultralight EV1 is an NFC-A Type 2 transit token for touch-range interactions; ICODE SLIX2 is an NFC-V ISO 15693ISO 15693Standard for vicinity-range smart cards, 1+ meter read rangeView full → inventory chip for bulk reading at up to 1 metre.
Overview
MIFARE Ultralight EV1: ISO 14443-3A, NFC ForumNFC ForumIndustry body developing NFC standards, specifications, and certifications since 2004View full → Type 2, 48–128 bytes, 32-bit password, 24-bit monotonic counter, ~4 cm read rangeread rangeMaximum communication distance between reader and tagView full →. Designed for limited-use transit tickets in controlled NFC-A reader environments. The hardware counter is the primary mechanism for enforcing ticket use limits without requiring cryptographic value decrement.
ICODE SLIX2: ISO 15693, NFC-V, 320 bytes in 80 four-byte blocks, 64-bit password plus Privacy Mode, up to 1 metre read range with compliant ISO 15693 readers. Designed for library book management, pharmaceutical track-and-trace, and industrial component tracking where simultaneous bulk reading at distance through portals and gates is the primary operational requirement.
Key Differences
- Read range: SLIX2 reads at up to 1 metre with compliant ISO 15693 readers. Ultralight EV1 requires ~4 cm proximity. This range difference determines the entire application architecture — one requires deliberate consumer tap; the other supports passive overhead scanning.
- Bulk inventory: SLIX2 supports ISO 15693 anti-collisionanti-collisionProtocol for selecting individual tags from multiple in RF fieldView full → for simultaneous multi-tag inventory reads — reading many tags in a reader field without sequential addressing. Ultralight EV1 uses ISO 14443ISO 14443Standard for contactless smart cards at 13.56 MHz (Types A and B)View full → anti-collision but at ~4 cm, which limits practical bulk reading.
- Security: SLIX2's 64-bit password plus Privacy Mode is marginally stronger than Ultralight EV1's 32-bit password, but neither provides AES-grade authenticationauthenticationIdentity verification of NFC tags/readers via passwords or cryptographyView full →.
- Counter: Ultralight EV1 has a hardware 24-bit monotonic counter — essential for transit use-limit enforcement. SLIX2 has no counter.
- Smartphone UX: Ultralight EV1 NFC-A NDEF is universally supported on all NFC phones. SLIX2 NFC-V requires Android 7+ / iOS 14+ with no native NDEF tap-to-URL experience.
- Data retentionData retentionEEPROMEEPROMNon-volatile memory technology retaining data without powerView full → data storage guarantee period (typically 10 years)View full →: SLIX2 is rated for 40 years vs Ultralight EV1's 10 years — relevant for archival label applications where tags must outlive the products they identify.
- Privacy Mode: SLIX2's Privacy Mode hides the UID from unauthenticated readers — useful for patient-linked pharmaceutical tags. Ultralight EV1 has no equivalent.
Technical Comparison
| Parameter | MIFARE Ultralight EV1 | ICODE SLIX2 |
|---|---|---|
| ISO standard | ISO 14443-3A (NFC-A, Type 2) | ISO 15693 (NFC-V) |
| Read range | ~4 cm | Up to 100 cm |
| User memoryUser memoryTag memory portion available for user data storageView full → | 48 or 128 bytes | 320 bytes (2560 bits) |
| Security | 32-bit password | 64-bit password + Privacy Mode |
| Monotonic counter | Yes (24-bit) | No |
| Bulk inventory | No | Yes (ISO 15693 anti-collision) |
| Smartphone support | All NFC phones | Android 7+ / iOS 14+ |
| NDEF native | Yes | Via Type 5 mapping (app required) |
| Data retention | 10 years | 40 years |
| Write endurance | 100,000 writes | 100,000 writes |
| Unit cost (volume) | $0.05–$0.12 | $0.10–$0.30 |
Use Cases
MIFARE Ultralight EV1 is appropriate for transit tokens, limited-use tickets, and any application where deliberate consumer tap at ~4 cm with NFC-A native NDEF readability is the interaction model and the hardware counter is the anti-reuse mechanism.
ICODE SLIX2 is appropriate for library book management with gate readers detecting checkout/return status at 1 metre, pharmaceutical serialization at dispensing counters requiring non-contact reading, and industrial component tracking through overhead portal readers where 4 cm proximity is operationally impractical.
Verdict
Ultralight EV1 and ICODE SLIX2 operate in different reader ecosystems with different operational requirements. Choose Ultralight EV1 for touch-range transit tokens in NFC-A controlled environments. Choose ICODE SLIX2 for item-level inventory tracking infrastructure where ISO 15693 long-range bulk reading and 40-year data retention are the primary operational requirements. The tag ecosystem (NFC-A vs NFC-V) and reader infrastructure typically make this choice without ambiguity.
अनुशंसा
Choose MIFARE Ultralight EV1 when you need improved Ultralight with password protection; choose ICODE SLIX2 when you need ISO 15693 with long read range (up to 1 m).