4-Kbit Dynamic NFC/RFID tag with password protection, energy harvesting and RF status functions

The M24LR04E-R device is a Dynamic NFC/RFID tag IC with a dual-interface, electrically erasable programmable memory (EEPROM). The logic scheme is shown in Figure 1.

It features an I2C interface and can be operated from a VCCpower supply. It is also a contactless memory powered by the received carrier electromagnetic wave. The M24LR04E-R is organized as 512 × 8 bits in the I2C mode and as 128 × 32 bits in RF mode.

The M24LR04E-R also features an energy harvesting analog output, as well as a user-configurable digital output pin toggling during either RF write in progress or RF busy mode.

Key Features

  • Belonging to ST25 family, which includes all NFC/RF ID tag and reader products from ST
  • I2 C interface
    • Two-wires I2 C serial interface supports 400 kHz protocol
    • Single supply voltage:
      • 1.8 V to 5.5 V
    • Byte and Page Write (up to 4 bytes)
    • Random and Sequential read modes
    • Self-timed programming cycle
    • Automatic address incrementing
    • Enhanced ESD/latch-up protection
    • I²C timeout
  • Contactless interface
    • ISO 15693 and ISO 18000-3 mode 1 compatible
    • 13.56 MHz ± 7 kHz carrier frequency
    • To tag: 10% or 100% ASK modulation using 1 out of 4 (26 Kbit/s) or 1 out of 256 (1.6 Kbit/s) pulse position coding
    • From tag: load modulation using Manchester coding with 423 kHz and 484 kHz subcarriers in low (6.6 kbit/s) or high (26 kbit/s) data rate mode. Supports the 53 kbit/s data rate with Fast commands
    • Internal tuning capacitance: 27.5pF
    • 64-bit unique identifier (UID)
    • Read Block & Write (32-bit blocks)
  • Digital output pin
    • User configurable pin: RF write in progress or RF busy mode
  • Energy harvesting
    • Analog pin for energy harvesting
    • 4 sink current configurable ranges
  • Temperature range
    • From –40 to 85 °C
  • Memory
    • 4-Kbit EEPROM organized into:
      • 512 bytes in I2C mode
      • 128 blocks of 32 bits in RF mode
    • Write time
      • I2C: 5 ms (max.)
      • RF: 5.75 ms including the internal Verify time
    • Write cycling endurance:
      • 1 million write cycles at 25 °C
      • 150k write cycles at 85 °C
    • More than 40-year data retention
    • Multiple password protection in RF mode
    • Single password protection in I2 C mode
    • Package
      • SO8 (ECOPACK2®)
      • TSSOP8 (ECOPACK2®)
      • UFDFPN8 (ECOPACK2®)

Circuit Diagram

0 Download


Technical Documentation

Product Specifications
Description Version Size
Dynamic NFC/RFID tag IC with 4-Kbit EEPROM, energy harvesting, I²C bus and ISO 15693 RF interface 11.0 2 MB
Application Notes
Description Version Size
CR95HF library for ISO15693 and Dual Interface EEPROM products 1.2 689 KB
Comparison of RF addressing modes of low-density and high-density ISO/IEC 15693 devices 4.0 273 KB
Configuring your ISO 15693 reader to support the M24LRxx-R and M24LRxxE-R devices 2.1 226 KB
Description of the M24LRxx-R and M24LRxxE-R dual interface memory’s password protection mechanism 2.1 318 KB
Designing an NFC Android Application for M24SR and M24LR devices 1.0 865 KB
Designing an NFC Android Application for M24SR and M24LR devices 1.1 864 KB
Designing an application board compatible with either standard M24LRxx-R or energy-harvesting M24LRxxE-R devices 2.2 97 KB
Developing an application allowing PR101-USB and MR101-USB FEIG readers to communicate with M24LRXX transponders 2.2 421 KB
How to design an antenna for dynamic NFC tags 7.0 2 MB
How to manage simultaneous I²C and RF data transfers with the M24LRxxE-R 1.2 391 KB
Increasing the M24LRXXE-R family ESD robustness on antenna using an external ESD protection 1.1 511 KB
M24LR series internal capacitance considerations for antenna tuning 2.1 211 KB
Migrating from M24LR to M24SR series 1.1 166 KB
Migrating from M24LRxxE-R to ST25DVxxK 1.0 799 KB
Using LRIxx, LRISxx, M24LRxx-R and M24LRxxE-R products as NFC vicinity tags 4.1 962 KB
Using a surface-mount inductor as an M24LRxx antenna 2.3 305 KB
Using the CR95HF library with STM8L microcontrollers 2.2 1 MB
Using the same antenna for M24LRXXE-R and M24SRXX-Y Dual Interface EEPROM families 1.1 202 KB
Errata Sheets
Description Version Size
M24LR04E-R, M24LR16E-R and M24LR64E-R device limitations 2.1 58 KB

Presentations & Training Material

Description Version Size
M24LR series overview 2.0 1 MB

Publications and Collaterals

Description Version Size
FLM24LR640216 1.0 1 MB
Description Version Size
Products and solutions for solar energy 1.0 1 MB
Semiconductor solutions for healthcare applications 1.0 665 KB
Smart grid distribution and smart meters - Energy-efficient solutions 2.0 1 MB

Tools and Software

STM32 Open Development Environment
Embedded Software
MCUs Embedded Software
ST25 - NFC / RFID Software
Evaluation Tools
Product Evaluation Tools
Get Started Support & Community

Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
M24LR04E-RMN6T/2 SO8 Tape And Reel Active 0.3 1000 NEC EAR99 CHINA MORE INFO Get Sample Add to cart DISTRIBUTOR AVAILABILITY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
M24LR04E-RMN6T/2 ActiveSO8IndustrialEcopack2 0 0
M24LR04E-RMC6T/2 ActiveUFDFPN 8 2x3x0.6IndustrialEcopack2 0 0
M24LR04E-RDW6T/2 ActiveTSSOP8IndustrialEcopack2 0 0

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.