ST25R3911B-AQFT

l'immagine mostrata è solamente rappresentativa
Produttore: STMicroelectronics
Matchcode: ST25R3911B-AQFT
Rutronik No.: ICRFID1520
VPE: 4000
MOQ: 4000
dimensioni: QFN32
confezione: REEL
NFC IC QFN32 14443A/B R/W 1,4W Descrizione
ST25R3911B
High performance HF reader / NFC initiator with 1.4 W supporting VHBR and AAT
Description
The ST25R3911B is a highly integrated NFC Initiator / HF Reader IC, including theanalog front end (AFE) and a highly integrated data framing system for ISO 18092
(NFCIP-1) initiator, ISO 18092 (NFCIP-1) active target, ISO 14443A and B reader
(including high bit rates), ISO 15693 reader and FeliCa™ reader. Implementation of
other standard and custom protocols like MIFARE™ Classic is possible using the
AFE and implementing framing in the external microcontroller (Stream and
Transparent modes).
The ST25R3911B is positioned perfectly for the infrastructure side of the NFC
system, where users need optimal RF performance and flexibility combined with low
power.
Thanks to automatic antenna tuning (AAT) technology, the device is optimized for
applications with directly driven antennas. The ST25R3911B is alone in the domain of
HF reader ICs as it contains two differential low impedance (1 Ohm) antenna drivers.
The ST25R3911B includes several features that make it very suited for low power
applications. It contains a low power capacitive sensor that can be used to detect the
presence of a card without switching on the reader field. The presence of a card can
also be detected by performing a measurement of amplitude or phase of signal on
antenna LC tank, and comparing it to the stored reference. It also contains a low
power RC oscillator and wake-up timer that can be used to wake up the system after
a defined time period, and to check for the presence of a tag using one or more low
power detection techniques (capacitive, phase or amplitude).
The ST25R3911B is designed to operate from a wide (2.4 V to 5.5 V) power supply
range; peripheral interface IO pins support power supply range from 1.65 V to 5.5 V.
Features
• ISO 18092 (NFCIP-1) Active P2P• ISO14443A, ISO14443B, ISO15693 and FeliCa™
• Supports VHBR (3.4 Mbit/s PICC to PCD framing, 6.8 Mbit/s AFE and PCD to
PICC framing)
• Capacitive sensing - Wake-up
• Automatic antenna tuning system providing tuning of antenna LC tank
• Automatic modulation index adjustment
• AM and PM demodulator channels with automatic selection
• DPO (Dynamic power output)
• Up to 1.4 W in case of differential output
• User selectable and automatic gain control
• Transparent and stream modes to implement MIFARE™ classic compliant or
other custom protocols
• Possibility of driving two antennas in single ended mode
• Oscillator input capable of operating with 13.56 MHz or 27.12 MHz crystal with
fast start-up
• 6 Mbit/s SPI with 96 bytes FIFO
• Wide supply voltage range from 2.4 V to 5.5 V
• Wide temperature range: -40 °C to 125 °C
•QFN32, 5 mm x 5 mm package
Parametri
- Type
- IC
- Oper.frequency
- 13,56 M Hz
- Phy.interface
- SPI
- Mode
- R/W
- Supply voltage
- 2,4-5,5 V
- Oper.temp.
- -40 to +85 °C
- Dimension(LxW)
- 5x5 mm
- Thickness
- 0.9 mm
- Automotive
- NO
- Package
- QFN32
- Leadfree Defin.
- 10
- Tipo di confezione
- REEL
- EAR99
- Numero di tariffa doganale
- 85423275000
- Stato
- South Korea
- Codice- ABC
- A
- Tempo di consegna standard
- 26 Settimane