ST25R3911B

量産中
Design Win
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High performance HF reader / NFC initiator with 1.4 W supporting VHBR and AAT

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製品概要

概要

The ST25R3911B is a highly integrated NFC Initiator / HF reader IC, including the analog 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.

  • 特徴

    • 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, 5x5 mm package with wetable flank or wafer delivery
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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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Signal Conditioning Design Tool

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NFC/RFID Calculators

NFC Inductance

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STMicroelectronics - ST25R3911B

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品質 & 信頼性

製品型番 マーケティング･ステータス パッケージ グレード RoHSコンプライアンスグレード 材料宣誓書**
ST25R3911B-AQFT
量産中
VFQFPN 32 5x5x1.0 mm インダストリアル Ecopack2
ST25R3911B-AQWT
量産中
VFQFPN 5X5X1 32L WETTABLE FLANKS インダストリアル Ecopack2
ST25R3911B-ASWB
量産中
US WF V.I. インダストリアル N/A

ST25R3911B-AQFT

Package:

VFQFPN 32 5x5x1.0 mm

Material Declaration**:

PDF XML
More Info

Marketing Status

量産中

Package

VFQFPN 32 5x5x1.0 mm

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST25R3911B-AQWT

Package:

VFQFPN 5X5X1 32L WETTABLE FLANKS

Material Declaration**:

PDF XML
More Info

Marketing Status

量産中

Package

VFQFPN 5X5X1 32L WETTABLE FLANKS

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST25R3911B-ASWB

Package:

US WF V.I.

Material Declaration**:

More Info

Marketing Status

量産中

Package

US WF V.I.

Grade

Industrial

RoHS Compliance Grade

N/A

(**) st.comで提供している材料宣誓書は、パッケージ･ファミリ内で最も一般的に使用されているパッケージに基づく汎用ドキュメントの場合があります。そのため、特定の製品では100%正確ではない可能性があります。特定の製品情報については、セールスサポートまでお問い合わせください

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