New Product Introduction

STMicroelectronics ST25R3911B NFC / HF RFID reader IC

The ST25R3911B is positioned perfectly for the infrastructure side of the NFC system, where users need optimal RF performance and flexibility.

STMicroelectronics ST25R3911B product image

The ST25R3911B is a highly integrated NFC Initiator / HF Reader IC, including the analog front end (AFE) and a highly integrated data framing system for ISO 18092 (NFCIP-1) active target, ISO 14443A and B reader (including high bit rates) and FeliCa™ reader. Implementation of other standard and custom protocols like MIFARE™ Classic is possible using the AFE and implementing framing in the external microcontroller (Stream and Transparent modes).The ST25R3911B is positioned perfectly for the infrastructure side of the NFC system, where users need optimal RF performance and flexibility.

 

Key features

  • Supports VHBR
  • DPO (Dynamic Power Output)
  • Capacitive sensing - Wake-up
  • Possibility of driving two antennas in single ended mode

Additional features

  • ISO 18092 (NFCIP-1) Active P2P
  • ISO14443A, ISO14443B and FeliCa™
  • Supports VHBR (3.4 Mbit/s PICC to PCD framing, 6.8 Mbit/s AFE and PCD to PICC framing)
  • Capacitive sensing - Wake-up
  • Automatic antenna tuning system providing tuning of antenna LC tank
  • Automatic modulation index adjustment
  • AM and PM (I/Q) demodulator channels with automatic selection
  • DPO (Dynamic Power Output)
  • Up to 1.4 W in case of differential output
  • User selectable and automatic gain control
  • Transparent and Stream modes to implement MIFARE™ Classic compliant or other custom protocols
  • Possibility of driving two antennas in single ended mode
  • Oscillator input capable of operating with 13.56 MHz or 27.12 MHz crystal with fast start-up
  • 6 Mbit/s SPI with 96 bytes FIFO
  • Wide supply voltage range from 2.4 V to 5.5 V
  • Wide temperature range: -40° C to 125° C
  • QFN32, 5 mm x 5 mm package

 

Applications

  • Parameter setting
  • Device maintenance
  • Barcode replacement
  • IoT devices

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