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NFCI²C dual interfaceSTMicroelectronics

ST25DV04K

The STMicroelectronics ST25DV04K is an NFC tag IC, with 512 bytes (4 Kbit) EEPROM, operating at 13.56 MHz, under ISO/IEC 15693 NFC Forum Type 5.

Dynamic NFC/RFID tag with 4-Kbit EEPROM and I²C

Official Datasheet ↗
Frequency
13.56 MHz
Protocol
ISO/IEC 15693, NFC Forum Type 5
Memory
512 bytes (4 Kbit) EEPROM
Interface
RF (contactless), I²C
Temp Range
-40°C to +85°C
Form Factor
SO8N, TSSOP8, UFDFPN8

Full Specifications

ManufacturerSTMicroelectronics
Frequency CategoryNFC
Frequency13.56 MHz
ProtocolISO/IEC 15693, NFC Forum Type 5
Memory512 bytes (4 Kbit) EEPROM
InterfaceRF (contactless), I²C
Temperature Range-40°C to +85°C
Form FactorSO8N, TSSOP8, UFDFPN8
Security64-bit password protection, dual-zone security, write protection

Engineering Brief

The ST25DV04K is a dynamic dual-interface NFC tag combining 13.56 MHz contactless RF communication via ISO/IEC 15693 with a fast I²C wired interface for embedded system integration. It features 512 bytes of EEPROM organized with configurable security zones, energy harvesting capability from the RF field, and fast transfer mode up to 53 kbit/s. The chip enables applications requiring both wireless smartphone interaction and direct microcontroller access, with mailbox functionality for bidirectional communication between RF and I²C interfaces.

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Frequently Asked Questions

How much memory does the ST25DV04K have?

The ST25DV04K has 512 bytes (4 Kbit) of EEPROM memory. This memory is organized with configurable security zones for flexible access control.

What interfaces does the ST25DV04K support?

The ST25DV04K features dual interfaces: contactless 13.56 MHz RF communication via ISO/IEC 15693 and NFC Forum Type 5, plus a wired I²C interface for direct microcontroller access. This enables both wireless smartphone interaction and embedded system integration.

Does the ST25DV04K support energy harvesting?

Yes, the ST25DV04K includes energy harvesting capability from the RF field, allowing it to power external circuits or sensors when exposed to an NFC reader field.

What security features does the ST25DV04K offer?

The ST25DV04K provides 64-bit password protection, dual-zone security for partitioned memory access control, and write protection capabilities to secure data against unauthorized modification.

What is the mailbox function on the ST25DV04K?

The mailbox function enables bidirectional communication between the RF and I²C interfaces, allowing a microcontroller and NFC reader to exchange data dynamically through the tag.

What is the maximum data transfer speed for ST25DV04K?

The ST25DV04K supports fast transfer mode up to 53 kbit/s over the RF interface, enabling quicker data exchange during NFC transactions.

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