STMicroelectronics ST25R3916B/17B NFC Readers

STMicroelectronics ST25R3916B/17B NFC Readers are high-performance NFC universal devices for payment, consumer, and industrial applications. When applicable, the ST25R3916B/17B supports NFC initiator, NFC target, NFC reader, and NFC card emulation modes. The NFC Readers are fully compliant with EMVCo 3.1a analog and digital. This compliance results in the device being optimized for POS terminal applications and enables fast EMVCo certification cycles, even under harsh conditions, with antenna around noisy LCDs.

The STM ST25R3916B 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, NFCF (FeliCa™) reader, NFC-V (ISO 15693) reader up to 53kbps, and NFC-A / NFC-F card emulation. The ST25R3917B offers a reduced feature set compared to the ST25R3916B.

The ST25R3916B and ST25R3917B deliver high RF output power to drive antennas at high efficiency directly. Additionally, the ST25R3916B and ST25R3917B include features making them incomparable for low-power applications. The devices contain a low-power RC oscillator and wake-up timer to automatically wake up after a selected time and check for a presence of a tag using one or more techniques of low power detection of card presence (phase or amplitude).

The ST25R3916B/17B NFC Readers are intended to operate from a wide power supply range (2.6V to 5.5V from -40°C to +105°C, 2.4V to 5.5V from -20°C to +105°C), and a wide peripheral IO voltage range (from 1.65V to 5.5V). This combination of high RF output power, low power modes, and a wide supply range allow the ST25R3916B/17B to be ideal for infrastructure NFC applications.

Features

Operating modes
- Reader/writer
- Card emulation
- Active and passive peer to peer
Key features
- Dynamic power output (DPO) controls the field strength to stay within given limits
- Active waveshaping (AWS) reduces over and under-shoots
- Noise suppression receiver (NSR) allows reception in a noisy environment
- Automatic antenna tuning (AAT) via variable capacitor
- Integrated EMVCo® 3.1a compliant EMD handling
- Automatic gain control and squelch feature to maximize SNR
- Low power NFC active and passive target modes
- Adjustable ASK modulation depth, from 0 to 82%
- 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, RSSI, on-chip supply, and regulated voltages

RF communication
- EMVCo® 3.1a analog and digital compliant
- NFC-A / ISO14443A up to 848kbit/s
- NFC-B / ISO14443B up to 848kbit/s
- NFC-F / FeliCa™ up to 424kbit/s
- NFC-V / ISO15693 up to 53kb/s
- NFC-A / ISO14443A (106kbit/s) and NFC-F / FeliCa™ (212/424kbit/s) card emulation
- Active and passive peer to peer initiator and target modes, up to 424kbit/s
- Low-level modes to implement MIFARE Classic® compliant or other custom protocols
External communication interfaces
- 512-byte FIFO
- Serial peripheral interface (SPI) up to 10Mbit/s
- I²C with up to 400kbit/s in Fast-mode, 1Mbit/s in Fast-mode Plus, and 3.4Mbit/s in high-speed mode
Electrical characteristics
- Wide supply voltage and ambient temperature range (2.6V to 5.5V from -40°C to +105°C, 2.4V to 5.5V from -20°C to +105°C)
- Wide peripheral comm supply range of 1.65V to 5.5V
- Quartz oscillator capable of operating with 27.12MHz crystal with fast start-up

Applications

NFC Forum compliant NFC universal device
EMVCo 3.1a compliant contactless payment terminal
ISO14443 and ISO15693 compliant general purpose NFC device

FeliCa™ reader/writer
Support all five NFC Forum Tag types in reader mode
Support all common proprietary protocols, such as Kovio, CTS, B’

STMicroelectronics ST25R3916B/17B NFC Readers

Features

Applications

Block diagram

System diagram

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