ST25DV-I2C series Dynamic NFC Tags

Pictogram representing ST25-brand

The ST25DV-I2C series of Dynamic tags offers both an NFC/RFID contactless interface and an enhanced I²C wired interface for connecting to a host, such as a microcontroller or microprocessor.

What is the ST25DV-I2C series?

These NFC Forum Type 5 Dynamic tags operate in the high-frequency range (13.56 MHz). The data stored in tags can be accessed by any NFC smartphone or NFC/RFID HF professional reader, and also by an MCU, using the I2C wired link.

ST25 NFC Dynamic Tag brings wiresless connectivity to MCU

ST25DV-I2C tags offer rapid writing, fast transfer mode, enhanced I²C features, energy harvesting, low power mode, and password protection. Thanks to this rich feature set, these highly integrated and cost-effective tags are suitable for a wide range of applications.

Moreover, developers benefit from a complete ecosystem with evaluation boards, software tools, mobile app, and other resources to speed up application development.

ST25DV-I2C series is in the ST 10 year longevity program that ensures continuous supply for 10 years.


ST25DV-I2C series products are suitable for a broad range of applications in industrial or consumer domains.
Its rich feature set, including fast transfer mode (between NFC and I²C interfaces), NFC Forum type 5 support, highly reliable EEPROM memory, energy harvesting capabilities, and large package range ensure that the ST25DV-I2C series can meet various customer application needs.

Discover our portfolio

The ST25DV-I2C series comes in many packages, ranging from robust to ultrasmall solutions, with 4 to 64 kilobits of memory and several temperature grades.

Graph representing ST25DV-I2C series portfolio, featuring multiple packages from 4kbits to 64 kbits memory density


  • Allows batteryless or low-power operation
  • Improves user experience through NFC features and capabilities
  • Reduces complexity and time in some production processes
  • Enables in-the-field contactless maintenance in constrained environments (sealed products, difficult access, etc.)
  • Compatible with RFID reader and NFC mobile phone
  • Easy physical integration thanks to small packages
  • Support multiple use cases along a product lifetime from manufacturing to end user
Product lifecycle and use cases
Banner for NFC for Simplified Commissioning webinar

NFC dynamic tags for simplified commissioning.

Discover what commissioning is and how NFC can simplify IoT adoption and enhance end-user experience.

Watch now

ST25DV-I2C series characteristics

  • ISO/IEC 15693 and NFC Forum type 5 tag contactless interface
  • 1MHz I²C serial interface operating from 1.8 to 5.5 V
  • EEPROM memory density from 4 to 64 Kbits
  • Endurance of 1M cycles
  • Data retention 40 years
Advanced features
  • Fast transfer mode thanks to 256-byte buffer
  • Enhanced features for I²C interface
  • Energy harvesting
  • 64-bit passwords protection
  • Low power mode
  • GPO interruption pin configurable on multiple RF events
  • 64-bit unique identifier
  • TSSOP8, SO-8
  • WLCSP10
Temperature ranges
  • Range 6:
    • From -40 to 85°C
  • Range 8:
    • From -40 to 105°C (UDFPN8 only)
    • From -40 to 125°C (SO8N and TSSOP8 only, 105°C max on RF interface)


eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Power Management Design Center

Thermal-electrical Simulators for Components

Signal Conditioning Design Tool

NFC/RFID Calculators

Choose design tool:

Power Supply Design Tool

SMPS design, by topology, by type and by product
PFC design with analog and digitial control
Supports various PCB configurations
Choose type:
Solar Battery Charger

LED Lighting Design Tool

Handles AC-DC and DC-DC design in common topologies
Displays interactive and annotated schematic
Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data
Choose type:

Digital Power Workbench

Provides a step-by-step optimized design of power section and control loop
Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs

Power Tree Designer

Specify input/output power for each node in the tree
Check for consistency
Design each individual node
Choose design tool:

AC Switches Simulator

Select ratings and application waveforms
Get junction temperature and blocking voltage graphs
Search and sort suitable devices

Rectifier Diodes Simulator

Select ratings and application waveforms
Estimate power losses
Search and sort suitable devices


Supports long mission profiles
Provides power loss and temperature graphs
Helps define heatsink thermal properties

Twister Sim

Help select the right ViPOWER Automotive power device
Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis
Supports various PCB configurations

TVS Simulator

Specify system ratings and surge waveform
Search and sort suitable devices


Build simple schematics and firmware inputs in minutes
Quickly generate reliable estimates of battery life, system power consumption and bill of materials costs
Choose design tool:

Active Filters

Handles multi-stage-designs and common topologies
Returns circuit component values
Provides gain, phase and group delay graphs
Low Pass, High Pass and Band Pass


Handles most common configurations
Returns circuit components values
Provides I/O signal waveforms
Inverting, Non Inverting, Window

Low side Current Sensing

Returns circuit component values
Provides current error graphs

High side Current Sensing

Provides current error graphs.
Help to select the right High side current sensing and shunt devices.
Choose design tool:

NFC Inductance

Input geometry and substrate properties
Get antenna impedance

UHF Link Budget

Enter forward and reverse link characteristics
The tool returns link budget estimate

NFC Tuning Circuit

Enter antenna parameter and matching target
Select the topology of the matching network
The tool returns component values for the desired design targets