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ST ST25R3911B-AQWTRoHS

Manufacturer
ST
MPN
ST25R3911B-AQWT
LCSC Part #
C5221753
Packaging
VFQFN-32L(5x5)
Customer #
Key Attributes
A high-performance HF card reader/NFC initiator device with a power consumption of 1.4W, capable of supporting VHBR and AAT.
Datasheetpdf iconST ST25R3911B-AQWT
In-Stock: 97
97 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 3.1534$ 3.15
10+$ 2.6684$ 26.68
30+$ 2.3813$ 71.44
100+$ 2.0909$ 209.09
500+$ 1.9563$ 978.15
1,000+$ 1.8963$ 1896.30
Standard Packaging4000/Full Reel
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Products Specifications

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TypeDescription
CategoryRF and Wireless/RFID, RF Access, Monitoring ICs
ManufacturerST
PackagingVFQFN-32L(5x5)
FeaturesBuilt-in antenna driver;Low power wake-up;Data verification
Voltage - Supply2.4V~5.5V
Frequency13.56MHz
agreementFeliCa,ISO 18092,ISO 14443A,ISO 14443B,MIFARE,NFC
InterfaceSPI
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging4000
Sales UnitPiece

Introduction

AI Translation

The ST25R3911B is a highly integrated NFC initiator/HF reader IC comprising an analog front end and a highly integrated data framing system. It supports operation as an ISO18092 (NFCIP-1) initiator, ISO18092 (NFCIP-1) active target, ISO14443A and B reader (including high bit rates), and FeliCa reader. Additional standards and custom protocols (such as MIFARE Classic) can be implemented using its analog front end via an external microcontroller in stream mode and transparent mode. The device is fully suited for NFC systems requiring outstanding RF performance, flexibility, and low-power capability. Its automatic antenna tuning technology makes it an ideal choice for direct-drive antenna applications. This IC stands out in the HF reader IC segment by featuring two differential low-impedance (1 Ω) antenna drivers. It integrates multiple functions well-suited for low-power applications, including a low-power capacitive sensor for detecting card presence without activating the reader's RF field, and a method for card detection by measuring the amplitude or phase of the antenna LC resonator signal and comparing it against stored reference values. It also incorporates a low-power RC oscillator and wake-up timer that can wake the system after a defined time period, using one or more low-power detection techniques (capacitive, phase, or amplitude) to check for tag presence. The device is designed to operate over a wide supply voltage range (2.4 V to 5.5 V), with peripheral interface I/O pins supporting a supply voltage range of 1.65 V to 5.5 V.

Features

AI Translation
  • ISO18092 (NFCIP-1) active peer-to-peer, ISO14443A, ISO14443B, and FeliCa protocol support
  • Ultra-high bit rate support (3.4Mbit/s PICC-to-PCD framing, 6.8Mbit/s AFE and PCD-to-PICC framing)
  • Capacitive wake-up function
  • Automatic antenna tuning system with antenna LC resonator tuning support
  • Automatic modulation index adjustment
  • Selectable AM and phase (I/Q) demodulator channels with auto-select capability
  • Dynamic power output
  • Differential output power up to 1.4W
  • User-selectable and automatic gain control
  • Transparent mode and streaming mode for MIFARE Classic compatibility or other custom protocol compatibility
  • Dual antenna drive capability in single-ended mode
  • Oscillator input supporting 13.50MHz or 27.12MHz crystal with fast start-up
  • 6Mbit/s SPI interface with 96-byte FIFO
  • Wide supply voltage range: 2.4V to 5.5V
  • Wide operating temperature range: -40℃ to 125℃
  • QFN32, 5mm × 5mm package