Product overview
Description
The ST25R3916B, ST25R3917B and ST25R3919B (hereafter referred to as ST25R39xxB) 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 3.1a analog and digital, this NFC IC is optimized for POS terminal applications, and enables fast EMVCo certification cycles, even under harsh conditions, with antenna around noisy LCD displays.
The ST25R3916B device 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 ST25R3917B and ST25R3919B provides a reduced feature set compared to the ST25R3916B.
Special stream and transparent modes of the AFE and framing system is used to implement other custom protocols in reader or card emulation mode.
The ST25R39xxB feature high RF output power to directly drive antennas at high efficiency.
The ST25R39xxB include additional features, making them incomparable for low power applications. The presence of a card is 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 ST25R39xxB 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 (phase or amplitude).
The ST25R39xxB 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.
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All features
- Operating modes
- Reader/writer
- Card emulation
- Active and passive peer to peer
- RF communication
- EMVCo® 3.1a 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 (106 kbit/s) and NFC-F / FeliCa™ (212/424 kbit/s) 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 over-and under-shoots
- Noise suppression receiver (NSR) allows reception in 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
- 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
- Operating modes
eDesignSuite
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Power Management Design Center
Thermal-electrical Simulators for Components
Signal Conditioning Design Tool
NFC/RFID Calculators
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Rectifier Diodes Simulator
STPOWER Studio
Twister Sim
TVS Simulator
Estimate
Active Filters
Comparators
Low side Current Sensing
High side Current Sensing
NFC Inductance
UHF Link Budget
NFC Tuning Circuit
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STMicroelectronics - ST25R3917B
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| ST25R3917B-AQET | Active | UFQFPN 32 5x5x0.55 mm | Industrial | Ecopack2 | |
| ST25R3917B-AQWT | NRND | VFQFPN 5X5X1 32L WETTABLE FLANKS | Industrial | Ecopack2 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | Free Samples | ESample Max Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||||||
| ST25R3917B-AQWT | | | distributors No availability of distributors reported, please contact our sales office |
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| ST25R3917B-AQET | | | distributors No availability of distributors reported, please contact our sales office |
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ST25R3917B-AQWT NRND
ST25R3917B-AQET Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors