ST25R3916 High-Performance NFC Universal Device an

By STMicroelectronics 131

ST25R3916 High-Performance NFC Universal Device an

STMicroelectronics' ST25R3916 is a high-performance NFC universal device supporting NFC initiator, NFC target, NFC reader, and NFC card emulation modes.

The ST25R3916 includes an advanced analog front end (AFE) and a highly integrated data framing system for ISO 18092 passive and active initiator, ISO 18092 passive and active target, NFC-A/B (ISO 14443A/B) reader including higher bit rates, NFC-F (FeliCa™) reader, NFC-V (ISO 15693) reader up to 53 kbps, and NFC-A and NFC-F card emulation.

Special stream and transparent modes of the AFE and framing system can be used to implement other custom protocols such as MIFARE® classic in reader or card emulation mode.

The ST25R3916 features a high RF output power to directly drive antennas at high efficiency.

The ST25R3916 also includes several features which make it incomparable for low power applications. It contains a low power capacitive sensor to detect the presence of a card without switching on the reader field. Additionally, the presence of a card can still be detected by performing a measurement of the amplitude or phase of the antenna signal. It also contains a low power RC oscillator and wake-up timer to automatically wake-up the ST25R3916 after a selected period of time and check for a presence of a tag using one or more techniques of low power detection of card presence (capacitive, phase, or amplitude).

The ST25R3916 is designed to operate from a wide power supply range from 2.4 V to 5.5 V, and a wide peripheral IO voltage range from 1.65 V to 5.5 V.

Due to this combination of high RF output power, low power modes, and wide supply range the ST25R3916 is perfectly suited for infrastructure NFC applications.

Flyer: High-performance NFC Universal Device & EMVCo Reader

  • Operating modes
    • Reader/writer
    • Card emulation
    • Active and passive peer to peer
  • Hardware features
    • Dynamic power output (DPO) controls the field strength to stay within given limits
    • Active wave shaping (AWS) reduces over- and under-shoots
    • Noise suppression receiver (NSR) allows reception in noisy environment
    • Automatic antenna tuning (AAT) via variable capacitor
    • Integrated EMVCo compliant EMD handling
    • Automatic gain control and squelch feature to maximize SNR
    • Low power capacitive and inductive card detection
    • Low power NFC active and passive target modes
    • Adjustable ASK modulation depth from 5% to 40%
    • Integrated regulators to boost system PSRR
    • AM/PM and I/Q demodulator with baseband channel summation or automatic channel selection
    • Possibility to drive two independent single-ended antennas
    • Measurement of antenna voltage amplitude and phase, driver current, RSSI, on-chip supply, and regulated voltages
    • Up to 1.6 W differential output power
  • RF communication
    • NFC-A/ISO14443A up to 848 kbit/s
    • NFC-B/ISO14443B up to 848 kbit/s
    • NFC-F/FeliCa up to 424 kbit/s
    • NFC-V/ISO15693 up to 53 kb/s
    • NFC-A/ISO14443A and NFC-F/FeliCa card emulation
    • Active and passive peer to peer initiator and target modes up to 424 kbit/s
    • Low-level modes to implement MIFARE classic compliant or other custom protocols
  • Electrical characteristics
    • Wide supply voltage range from 2.4 V to 5.5 V
    • Wide peripheral communication supply range from 1.65 V to 5.5 V
    • Wide temperature range from -40°C to +125°C
    • Quartz oscillator capable of operating with 27.12 MHz crystal with fast start-up
  • External communication interfaces
    • 512 byte FIFO
    • Serial peripheral interface (SPI) up to 10 Mbit/s
    • I2C with up to 400 kbit/s in Fast-mode, 1 Mbit/s in Fast-mode Plus, and 3.4 Mbit/s in High-speed mode