Chip vs Chip

MIFARE DESFire EV2 vs ST25DV

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MIFARE DESFire EV2 offers 2-32 KB memory with AES-128 + proximity check security, making it ideal for high-security transit, national ID, government. ST25DV provides 4-64 Kbit with 64-bit password + configurable areas security, suited for IoT sensors, smart labels, energy harvesting, BLE pairing.

    
  


  
  
  

    
      
MIFARE DESFire EV2

      

        
FamilyMIFARE

        
Memory2048 bytes (user: 1760 B)

        
Price$0.600 – $1.400

      

    
    
      
ST25DV

      

        
FamilyST25

        
Memory4096 bytes (user: 4096 B)

        
Price$0.400 – $1.000

      

    
  

  

  
  

  






  
  

    
MIFARE DESFire EV2 vs ST25DV


DESFire EV2 is a standalone secure card chip; ST25DV is a dual-interface IoT tag with
I2C host integration and energy harvesting. Different architectures, minimal overlap.




Overview


MIFARE DESFire EV2: ISO 14443-4 (NFC-A), AES-128, Proximity Check, MIsmartApp, 2–32 KB.


ST25DV: ISO 15693 (NFC-V), I2C interface, energy harvesting, 512 B – 8 KB, configurable
memory areas with independent 64-bit passwords.




Key Differences


    

  • Dual interface: ST25DV bridges NFC and I2C. EV2 is RF-only.
    • 

  • Protocol: Different RF standards (ISO 14443-4 vs ISO 15693).
    • 

  • Security: EV2 provides AES-128 authentication/" class="glossary-term-link" data-term="mutual authentication" data-definition="Two-way identity verification between reader and tag" data-category="Security">mutual authentication. ST25DV provides 64-bit
  passwords per area — no mutual authentication.
    • 

  • Energy harvesting: ST25DV can power external circuits from the RF field.
    • 

  • Architecture: EV2 is a card credential chip; ST25DV is a PCB-mountable IoT component.
    • 





Technical Comparison






Parameter
MIFARE DESFire EV2
ST25DV






Standard
ISO 14443-4 (NFC-A)
ISO 15693 (NFC-V)




Host interface
None
I2C




Memory
2–32 KB
512 B – 8 KB




Read range
0–10 cm
0–100 cm




Energy harvesting
No
Yes




Security
AES-128, Proximity Check
64-bit password




Proximity Check
Yes
No




Typical cost (volume)
$0.50–$1.00
$0.50–$1.50








Verdict


DESFire EV2 for secure credential card programs. ST25DV for MCU-integrated NFC/I2C
bridge applications and IoT sensor nodes. Not substitutes.

  

  

  
  
  

    
Recommendation

    
Choose MIFARE DESFire EV2 when you need relay attack protection via proximity check; choose ST25DV when you need dual-interface (NFC + I2C) with energy harvesting.