The STMicroelectronics ST25R3916B-AQET is a high-performance 13.56MHz NFC universal reader IC designed for payment terminals, access control, consumer electronics and industrial NFC applications.
The device supports multiple NFC operating modes, including Reader/Writer, Card Emulation, Active Peer-to-Peer and Passive Peer-to-Peer, providing a flexible platform for contactless communication systems. ST specifically optimizes the device for EMVCo PCD L1 v3.2a analog and digital compliance, making it particularly suitable for POS terminals and contactless-payment readers.
ST25R3916B supports a broad range of NFC and RFID protocols. It supports NFC-A / ISO14443A and NFC-B / ISO14443B at data rates up to 848kbit/s, NFC-F / FeliCa up to 424kbit/s, and NFC-V / ISO15693 up to 53kbit/s. NFC-A and NFC-F card-emulation modes are also supported.
The integrated high-performance RF front end provides up to approximately 1.6W output power, enabling robust communication and supporting relatively compact antenna designs. The IC can also drive two independent single-ended antennas, providing additional flexibility for multi-antenna systems.
Advanced RF-management functions include Dynamic Power Output (DPO) for controlling RF field strength, Active Wave Shaping (AWS) to reduce waveform overshoot and undershoot, Noise Suppression Receiver (NSR) for improved reception in electrically noisy environments, and Automatic Antenna Tuning (AAT) to compensate for changes in antenna conditions.
The device also integrates automatic gain control, squelch functionality and EMVCo-compliant EMD handling. Adjustable ASK modulation depth from 0% to 82% provides additional flexibility when optimizing the RF interface for different NFC applications.
For communication with the host MCU, ST25R3916B integrates a 512-byte FIFO and supports both SPI and I2C interfaces. SPI operates at speeds up to 10Mbit/s, while I2C supports Standard, Fast, Fast-mode Plus and High-Speed operation up to 3.4Mbit/s.
The device supports a main supply range of 2.6V to 5.5V across -40°C to +105°C, while operation from 2.4V to 5.5V is supported over the -20°C to +105°C range. Its peripheral communication supply supports 1.65V to 5.5V, allowing convenient connection to modern low-voltage MCUs.
The specific ST25R3916B-AQET ordering code is supplied in a compact 32-pin UFQFPN package measuring 5 × 5 × 0.55mm. ST classifies the device as Industrial grade, Ecopack2, and currently lists it as an Active product in volume production.
Key Features
- Manufacturer: STMicroelectronics / ST
- Part Number: ST25R3916B-AQET
- Product Type: NFC / RFID Reader IC
- RF Frequency: 13.56MHz
- Operating Modes:
- Reader / Writer
- Card Emulation
- Active Peer-to-Peer
- Passive Peer-to-Peer
- 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 53kbit/s
- NFC-A Card Emulation
- NFC-F Card Emulation
- EMVCo PCD L1 v3.2a Analog and Digital Compliant
- RF Output Power: Up to Approx. 1.6W
- Dynamic Power Output: DPO
- Active Wave Shaping: AWS
- Noise Suppression Receiver: NSR
- Automatic Antenna Tuning: AAT
- Automatic Gain Control
- Squelch Function
- Automatic EMD Error Handling
- Adjustable ASK Modulation Depth: 0% to 82%
- Can Drive Two Independent Single-Ended Antennas
- Integrated 512-Byte FIFO
- Host Interface: SPI / I2C
- SPI Speed: Up to 10Mbit/s
- I2C Speed: Up to 3.4Mbit/s
- Peripheral I/O Supply: 1.65V to 5.5V
- Main Supply: 2.6V to 5.5V at -40°C to +105°C
- 27.12MHz Crystal Oscillator Support
- Operating Ambient Temperature: -40°C to +105°C
- Package: UFQFPN-32
- Package Size: 5 × 5 × 0.55mm
- Mounting Type: Surface Mount / SMD
- Packaging: Tape & Reel
- Factory Reel Quantity: 4,000 pcs
- Grade: Industrial
- RoHS Grade: Ecopack2
- Product Status: Active / Volume Production
Typical Applications
- Contactless Payment Terminals
- POS Terminals
- NFC Payment Readers
- Access Control Systems
- Smart Locks
- NFC Pairing
- Industrial NFC Readers
- Consumer Electronics
- IoT Devices
- Authentication Systems
- NFC Tag Reading and Writing
- Electronic Identification Systems
- Smart Appliances
- Device Configuration
- Contactless User Interfaces
The ST25R3916B-AQET is well suited for applications requiring a powerful and flexible 13.56MHz NFC reader IC with up to 1.6W RF output, EMVCo support, automatic antenna tuning and robust performance in electrically noisy environments.
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