STMicroelectronics ST25R3918 Multi-Purpose NFC Transceiver
STMicroelectronics ST25R3918 Multi-Purpose NFC Transceiver integrates an NFC reader, passive peer to peer functionality, and NFC card emulation. The ST25R3918 is optimized for IoT, consumer, and industrial applications where excellent analog performance is required. The device is designed to achieve good read ranges with low output power, even under noisy and harsh environments, using noise reduction receiver technology.
The ST25R3918 offers an advanced Analog Front End (AFE) and a highly integrated data framing system for NFC-A/B (ISO 14443A/B) readers, including higher bit rates. NFC-V (ISO 15693) reader is supported up to 53kbps via streaming mode to read cards.
ISO 18092 passive initiator and target and NFC-A/NFC-F card emulation are also available to ensure communication between end products. This enables device programming or simple NDEF data transfers to interact with Android™ phones or to use Apple® App Clips. 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 ST25R3918 includes a low-power wake-up mode to scan for the presence of a card by measuring the amplitude or phase of the antenna signal. It also contains a low-power RC oscillator and wake-up timer to automatically trigger the device after the configured time period and check for a presence of a tag.
The ST25R3918 is designed 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 1.65V to 5.5V peripheral I/O voltage range.
The STMicroelectronics ST25R3918 NFC Transceiver is offered in a compact VFQFPN32 package with an exposed pad for enhanced thermal performance.
Features
- Operating modes
- Reader/writer
- Card emulation
- 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 noisy environments
- Automatic gain control and squelch feature to maximize SNR
- Low power inductive card detection
- Low power NFC 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
- RF communication
- NFC-A / ISO14443A up to 848kbit/s
- NFC-B / ISO14443B up to 848kbit/s
- NFC-V / ISO15693 up to 53kb/s
- NFC-A / ISO14443A and NFC-F / FeliCa™ card emulation
- 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 400 kbit/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 1.65V to 5.5V peripheral communication supply range
- Quartz oscillator capable of operating with 27.12MHz crystal with fast start-up
- Wide supply voltage and ambient temperature range
- 5.0mm x 5.0mm VFQFPN32 package
Applications
- General consumer electronics, IoT as well as NFC applications such as accessory recognition and parameter setting
- Brand protection, access control, customer interaction, and consumer engagement
- Healthcare, gaming, beauty, power tools
- Enhanced user experience starting Apple App Clips and Android Instant App via CE mode
- ISO14443 and ISO15693 compliant general purpose NFC devices
- Contactless interface for programming and firmware updates
- Support of NFC Forum Tag types 1, 2, 4, and 5 in reader mode
- Support of common proprietary protocols, such as MIFARE, Kovio, and CTS
Datasheets
Related Products
STMicroelectronics ST25R High Performance NFC/RFID Readers
HF and NFC reader solutions that reduce design complexity and cost.
Block Diagram
Application Circuit Diagrams
Complete Your Design
STMicroelectronics 標準產品
可簡易替換的多樣化產品，適合廣泛使用的通用類比IC、獨立元件及序列EEPROM。