STMicroelectronics ST25R301→ST25R301-AQET

The ST25R301 is a high-performance NFC universal device supporting NFC initiator, NFC passive target, NFC reader, and NFC card emulation modes. Designed to be compliant with EMVCo^® PCD 3.2 analog and digital standards, this device is optimized for the most demanding POS terminal applications. It enables fast EMVCo^® certification cycles, even under challenging conditions, with the antenna behind noisy LCD displays.

The device includes an advanced analog front end (AFE) and a highly integrated data framing system for reader NFC_A/B (ISO14443A/B), including higher bit rates, NFC-F (FeliCa™), NFC-V (ISO15693) up to 212 kbps, and NFC_A/NFC_F card emulation. Special low-level modes of the AFE and framing system can be used to implement other custom protocols in reader or card emulation operations.

The device features high radio frequency (RF) power with dynamic power output to directly drive antennas at high efficiency. It achieves large interaction distances even with small antenna sizes in access control and EMVCo^® readers. The device offers long_range and low_power card detection by performing a measurement of the I and Q channels, which represent the real and imaginary part of the antenna signal.

Key features

• Operating modes
  • Reader/writer
  • Card emulation
• RF communication - Reader/writer
  • EMVCo^® PCD 3.2 analog- and digital-compliant
  • NFC-A/ISO/IEC 14443A up to 848 kbit/s
  • NFC-B/ISO/IEC 14443B up to 848 kbit/s
  • NFC-V/ISO/IEC 15693 up to 212 kbit/s
  • NFC-F/FeliCa™ up to 424 kbit/s
  • Low-level modes to implement MIFARE Classic^®-compliant and other custom protocols (Kovio BC, CTS, B')
• RF communication - card emulation
  • NFC-A/ISO/IEC 14443A 106 kbit/s
  • NFC-F/FeliCa™ 212/424 kbit/s
• Key characteristics
  • Passive P2P mode
  • NFC Forum universal device
  • Low-power inductive card detection
  • I/Q demodulator with baseband channel summation
  • USI WLC reader device
  • Dynamic power output (DPO) controls the field strength to stay within given limits (software feature)
  • Active wave shaping (AWS) reduces both over- and undershoots
  • Noise suppression receiver (NSR) allows reception in a noisy environment
  • Serial peripheral interface (SPI) up to 10 Mbit/s
  • Possibility to drive one differential or two independent single-ended antennas
• Electrical characteristics
  • Wide supply voltage range: 2.7 to 5.5 V
  • Wide peripheral communication supply range: 1.65 to 5.5 V
  • Wide ambient temperature range: -40 to +105 °C
  • Quartz oscillator capable of operating with 27.12 MHz crystal with fast startup

Applications

• EMVCo^® PCD 3.2 compliant contactless payment terminal
• Access control
• NFC wireless charging (WLC) poller
• NFC Forum-compliant NFC universal device
• WPC Qi out-of-band (OOB) communication and card protection NFC Reader
• WPC Ki power transmitter (PTx) communications unit
• ISO/IEC 14443 and ISO15693 compliant general-purpose NFC device
• FeliCa™ reader/writer