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NFCI²C dual interfaceSTMicroelectronics

ST25DV64K

The STMicroelectronics ST25DV64K is an NFC tag IC, with 64 Kbit (8 KB) EEPROM user memory, operating at 13.56 MHz, under ISO/IEC 15693 NFC Forum Type 5.

Dynamic NFC/RFID tag with 64-Kbit EEPROM and I²C

Official Datasheet ↗
Frequency
13.56 MHz
Protocol
ISO/IEC 15693, NFC Forum Type 5
Memory
64 Kbit (8 KB) EEPROM user memory
Interface
RF (contactless NFC), I²C
Temp Range
-40°C to +85°C
Form Factor
SO8, TSSOP8, UFDFPN8

Full Specifications

ManufacturerSTMicroelectronics
Frequency CategoryNFC
Frequency13.56 MHz
ProtocolISO/IEC 15693, NFC Forum Type 5
Memory64 Kbit (8 KB) EEPROM user memory
InterfaceRF (contactless NFC), I²C
Temperature Range-40°C to +85°C
Form FactorSO8, TSSOP8, UFDFPN8
Security64-bit password protection (I²C and RF), configurable security per area

Engineering Brief

The ST25DV64K is a dual-interface dynamic NFC tag combining contactless 13.56 MHz NFC operation (ISO/IEC 15693) with wired I²C access, featuring 64 Kbit of EEPROM organized as user-configurable memory areas. It enables simultaneous or independent access from both RF and I²C sides, with an energy harvesting output pin to power external circuits from the RF field. The chip offers password-protected areas, fast transfer mode support, and a mailbox feature for bidirectional communication between RF and I²C interfaces, making it ideal for secure IoT applications requiring both wireless smartphone interaction and embedded microcontroller access.

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Standards & Compliance

Frequently Asked Questions

What is the memory size of the ST25DV64K?

The ST25DV64K has 64 Kbit (8 KB) of EEPROM user memory, organized into user-configurable areas that can be individually password-protected.

Does the ST25DV64K support I²C interface?

Yes, the ST25DV64K features a dual-interface design with both contactless 13.56 MHz NFC (ISO/IEC 15693) and wired I²C interface, allowing simultaneous or independent access from both sides.

What security features does the ST25DV64K offer?

The ST25DV64K provides 64-bit password protection for both I²C and RF interfaces, with configurable security settings per memory area, enabling granular access control for different data zones.

Can the ST25DV64K power external circuits?

Yes, the ST25DV64K includes an energy harvesting output pin that can capture power from the RF field to supply energy to external microcontrollers or sensors during NFC interaction.

What is the mailbox feature in ST25DV64K?

The mailbox is a dedicated memory buffer enabling bidirectional communication between the RF (NFC) and I²C interfaces, allowing a smartphone and embedded microcontroller to exchange data through the tag.

Is the ST25DV64K compatible with NFC smartphones?

Yes, the ST25DV64K is NFC Forum Type 5 compliant and operates on ISO/IEC 15693 at 13.56 MHz, making it fully compatible with NFC-enabled smartphones and readers.

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