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

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Technical Documentation

Product Specifications
Description Version Size
DS8648 DS8648: 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
AN3375 AN3375: CR95HF library for ISO15693 and Dual Interface EEPROM products 1.2 689 KB
AN4054 AN4054: Comparison of RF addressing modes of low-density and high-density ISO/IEC 15693 devices 4.0 273 KB
AN3163 AN3163: Configuring your ISO 15693 reader to support the M24LRxx-R and M24LRxxE-R devices 2.1 226 KB
AN3002 AN3002: Description of the M24LRxx-R and M24LRxxE-R dual interface memory’s password protection mechanism 2.1 318 KB
AN4430 AN4430: Designing an NFC Android Application for M24SR and M24LR devices 1.0 865 KB
AN4430 AN4430: Designing an NFC Android Application for M24SR and M24LR devices 1.1 864 KB
AN3355 AN3355: Designing an application board compatible with either standard M24LRxx-R or energy-harvesting M24LRxxE-R devices 2.2 97 KB
AN3224 AN3224: Developing an application allowing PR101-USB and MR101-USB FEIG readers to communicate with M24LRXX transponders 2.2 421 KB
AN2972 AN2972: How to design an antenna for dynamic NFC tags 7.0 2 MB
AN4125 AN4125: How to manage simultaneous I²C and RF data transfers with the M24LRxxE-R 1.2 391 KB
AN4326 AN4326: Increasing the M24LRXXE-R family ESD robustness on antenna using an external ESD protection 1.1 511 KB
AN3249 AN3249: M24LR series internal capacitance considerations for antenna tuning 2.1 211 KB
AN4421 AN4421: Migrating from M24LR to M24SR series 1.1 166 KB
AN4975 AN4975: Migrating from M24LRxxE-R to ST25DVxxK 1.0 799 KB
AN3408 AN3408: Using LRIxx, LRISxx, M24LRxx-R and M24LRxxE-R products as NFC vicinity tags 4.1 962 KB
AN3178 AN3178: Using a surface-mount inductor as an M24LRxx antenna 2.3 305 KB
AN3985 AN3985: Using the CR95HF library with STM8L microcontrollers 2.3 1 MB
AN4409 AN4409: Using the same antenna for M24LRXXE-R and M24SRXX-Y Dual Interface EEPROM families 1.1 202 KB
AN1471 AN1471: What happens to the M24xxx I²C EEPROM if the I²C bus communication is stopped? 4.3 73 KB
Errata Sheets
Description Version Size
ES0195 ES0195: 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
NFC solutions from ST 1.0 3 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.