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  • The ST25R3914/5 are highly integrated NFC initiators / HF reader ICs for automotive applications, AEC-Q100 grade 1 qualified, 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 ST25R3914/5 are 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 devices are optimized for applications with directly driven antennas. The ST25R3914/5 are alone in the domain of HF reader ICs as they contain two differential low impedance (1 Ω) antenna drivers.
    The ST25R3914/5 include several features that make them very suited for low power applications. They contain 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. They also contain 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 ST25R3914/5 are 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.

    主な特徴

    • AEC-Q100 qualified
    • ISO 18092 (NFCIP-1) Active P2P
    • ISO14443A, ISO14443B, ISO15693 and FeliCa™
    • Support HBR up to 848 kbit/s PICC to PCD and PCD to PICC framing
    • Capacitive sensing - Wake-up
    • Automatic antenna tuning system providing tuning of antenna LC tank (ST25R3914 only)
    • Automatic modulation index adjustment
    • AM and PM (I/Q) demodulator channels with automatic selection
    • Up to 1 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
    • ST25R3914: VFQFPN32, 5 mm x 5 mm package with wettable flanks
    • ST25R3915: QFN32, 5 mm x 5 mm package

サンプル & 購入

製品型番
パッケージ
梱包タイプ
製品ステータス
概算価格(USS)
数量
ECCN (US)
Country of Origin
販売代理店からオーダー
STからオーダー
ST25R3914-AQWT VFQFPN 5X5X1 32L WETTABLE FLANKS Tape And Reel
アクティブ
3.1 1000 EAR99 - 販売代理店に在庫がない場合は、STのセールスオフィスまでお問い合わせください

ST25R3914-AQWT

パッケージ

VFQFPN 5X5X1 32L WETTABLE FLANKS

梱包タイプ

Tape And Reel

Unit Price (US$)

3.1*

製品ステータス

アクティブ

Unit Price (US$)

3.1

数量

1000

ECCN (US)

EAR99

Country of Origin

-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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      Antenna Matching Tool for ST25R NFC/HF reader family

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00 ファイルがダウンロード用に選択されています

技術文書

    • 概要 バージョン サイズ アクション
      DB3075
      Automotive high performance HF reader / NFC initiator with 1 W output power supporting AAT
      2.0
      163.76 KB
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      Automotive high performance HF reader / NFC initiator with 1 W output power supporting AAT

    • 概要 バージョン サイズ アクション
      AN4974
      Antenna matching for ST25R3911B/ST25R391x devices
      2.0
      3 MB
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      AN4914
      Automatic Antenna Tuning (AAT) of ST25R3911B/ST25R391x devices
      2.0
      1.9 MB
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      AN5043
      Layout recommendations for the design of boards with ST25R3911B/ST25R391x devices
      4.0
      873.78 KB
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      AN4985
      Wake-up mode of the ST25R3911B/ST25R391x
      1.0
      805.57 KB
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      Antenna matching for ST25R3911B/ST25R391x devices

      AN4914

      Automatic Antenna Tuning (AAT) of ST25R3911B/ST25R391x devices

      AN5043

      Layout recommendations for the design of boards with ST25R3911B/ST25R391x devices

      AN4985

      Wake-up mode of the ST25R3911B/ST25R391x

    • 概要 バージョン サイズ アクション
      AN5276
      Antenna design for ST25R3916
      2.0
      2.75 MB
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      AN4974
      Antenna matching for ST25R3911B/ST25R391x devices
      2.0
      3 MB
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      AN5322
      ST25R3916 automatic antenna tuning (AAT)
      1.0
      1.08 MB
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      Antenna design for ST25R3916

      AN4974

      Antenna matching for ST25R3911B/ST25R391x devices

      AN5322

      ST25R3916 automatic antenna tuning (AAT)

プレゼンテーション & トレーニング資料

    • 概要 バージョン サイズ アクション
      ST253911B-15 Product Presentation 1.0
      3.4 MB
      PDF

      ST253911B-15 Product Presentation

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      Automotive NFC/HF readers 1.0
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      808.11 KB
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      Electric vehicle (EV) ecosystem

      NFC solutions from ST

製品型番 製品ステータス 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**
ST25R3914-AQWT
アクティブ
VFQFPN 5X5X1 32L WETTABLE FLANKS オートモーティブ Ecopack2

ST25R3914-AQWT

Package:

VFQFPN 5X5X1 32L WETTABLE FLANKS

Material Declaration**:

PDF XML

Marketing Status

アクティブ

Package

VFQFPN 5X5X1 32L WETTABLE FLANKS

Grade

Automotive

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.