Recognized for the quality of its NFC/RFID contactless interface, our ST25D series of Dynamic tags is available with wired connectivity (I²C or PWM) suitable for many consumer or industrial applications.
With up to 64 Kbits of EEPROM, these certified NFC Forum tags support short-range (ISO/IEC 14443) or long-range (ISO/IEC15693) contactless standards.
What is an ST25 Dynamic NFC tag?
ST25 Dynamic NFC tags are battery-less devices composed of a chip and an antenna. When powered by the magnetic field generated by an NFC/RFID reader (for example, a smartphone), it enables exchanges between the reader and the tag.
Additionally, our ST25 Dynamic NFC tags embed a contact interface, either a low-power I²C or PWM (Pulse Width Modulation) connection depending on the series. Usually wired to a microcontroller through the I²C interface, ST25DV-I2C tags enable contactless applications. ST25DV-PWM devices with PWM outputs are more suitable for industrial configuration applications.
Main applications
Available in several memory densities and with many key features, ST25 Dynamic NFC tags target a wide range of applications including industrial, metering, lighting, healthcare, consumer electronics, home appliance, electronic shelf labels, IoT objects, and more.
- Lighting and controls
- Metering
- Industrial motor control
- Factory automation
- Medical and healthcare
- ESL
- Power tools
- Maintenance
- Asset tracking
- Smart farming
- Small appliances and kitchen aids
- eScooter micro-mobility solutions
- Retail logistics
- Smart waste management
Our 10 year longevity program is available for selected devices to ensure ongoing deployment in key industrial-grade and medical NFC / RFID applications
ST25 Dynamic NFC tag series
Our portfolio offers two main series, providing different kinds of wired interfaces.
Discover our portfolio of ST25 Dynamic NFC tags
Benefits of ST25 Dynamic NFC tags with wired interface
By offering a bidirectional wired connection to an embedded microcontroller, our ST25 Dynamic NFC tags deliver an enhanced wireless experience to end products letting users manage devices with simple tap. Other key benefits include:
- Reliable end-product thanks to high-performance non-volatile memory
- Enhanced protection with up to 128-bit passwords
- Improved energy savings with multiple and flexible interrupts
- Optimized board design with a wide package offer
- Easy migration from M24LR to ST25DV-I2C series
Useful information
WHAT IS TruST25 DIGITAL SIGNATURE? This in-house industrialization process ensures die authenticity provided by STMicroelectronics to help fight counterfeiting. 
WHAT IS ENERGY HARVESTING? When an electromagnetic field is detected, the chip transforms the inducted energy into an electrical current to supply the tag IC and the MCU. 
WHAT IS FAST TRANSFER MODE (FTM)? Using a dedicated 256-byte mailbox buffer, the FTM allows fast exchanges between RF and I2C domains, accessible from both. 
WHAT IS GPO? A general-purpose output delivers configurable interrupt capabilities with multiple drive options. 
WHAT IS PWM OUTPUT? Standing for Pulse Width Modulation, it generates variable duty cycles for system control. Commonly used in lightning and power-supply applications... Characteristic of ST25 Dynamic NFC tags
| ST25DV-I2C series | ST25DV-PWM series | M24SR series | M24LR series | |
| Standard compliancy | ISO 15693 Up to 53 kb/s NFC Forum Type 5 | ISO 15693 Up to 53 kb/s NFC Forum Type 5 | ISO 14443-A 106 kb/s NFC Forum Type 4 | ISO 15693 Up to 53 kb/s NFC Compatible |
| Memory | EEPROM Up to 64 Kbits 40-year, 1M cycles | EEPROM 2 Kbits 40-year, 100k cycles | EEPROM Up to 64 Kbits 200-year, 1M cycles | EEPROM Up to 64 Kbits 40-year, 1M cycles |
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