Features
 Operating modes
– Reader/writer
– Card emulation
– Active and passive peer to peer
 RF communication
– EMVCo™ 3.0 analog and digital compliant
– 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
 Key features
– Dynamic power output (DPO) controls the
field strength to stay within given limits
– Active wave shaping (AWS) reduces overand
under-shoots
– Noise suppression receiver (NSR) allows
reception in noisy environment
– Automatic antenna tuning (AAT) via
variable capacitor
– Integrated EMVCo™ 3.0 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, RSSI, on-chip supply and
regulated voltages
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
Electrical characteristics
– Wide supply voltage and ambient
temperature range (2.6 to 5.5 V from -40 °C
to +105 °C, 2.4 to 5.5 V from -20 °C to
+105 °C)
– Wide peripheral communication supply
range, from 1.65 to 5.5 V
– Quartz oscillator capable of operating with
27.12 MHz crystal with fast start-up

Applications
The ST25R3916 and ST25R3917 devices (hereinafter referred to as ST25R3916/7) are
suitable for a wide range of NFC and HF RFID applications, among them
 NFC Forum compliant NFC universal device
 EMVCo 3.0 compliant contactless payment terminal
 ISO14443 and ISO15693 compliant general purpose NFC device
 FeliCa™ reader / writer
 Support of all five NFC Forum Tag types in reader mode
 Support all common proprietary protocols, such as Kovio, CTS, B’.
The main differences between the two devices are detailed in Table 1.

Description
The ST25R3916/7 are high performance NFC universal devices supporting NFC initiator,
NFC target, NFC reader and NFC card emulation modes when applicable.
Being fully compliant with EMVCo 3.0 analog and digital, this NFC IC is optimized for POS
terminal applications, and enables the fastest EMVCo 3.0 certification cycles possible, even
under harsh conditions, with antenna around noisy LCD displays.
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 / NFC-F card emulation. The
ST25R3917 offers a reduced feature set.
Special stream and transparent modes of the AFE and framing system can be used to
implement other custom protocols in reader or card emulation mode.
The ST25R3916/7 feature high RF output power to directly drive antennas at high efficiency.
The ST25R3916/7 include additional features, making them incomparable for low power
applications. They contain 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 be detected by
performing a measurement of the amplitude or phase of the antenna signal. They also
contain a low power RC oscillator and wake-up timer to automatically wake-up the
ST25R3916/7 after a selected time period 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 ST25R3916/7 are designed to operate from a wide power supply range (2.6 to 5.5 V
from -40 °C to +105 °C, 2.4 to 5.5 V from -20 °C to +105 °C), and a wide peripheral IO
voltage range (from 1.65 to 5.5 V).
Due to this combination of high RF output power, low power modes and wide supply range
these devices are perfectly suited for infrastructure NFC applications.