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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.

    Key Features

    • 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

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Related Applications

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      STSW-ST25R004

      Active

      Antenna Matching Tool for ST25R NFC/HF reader family

      ST25 - NFC / RFID Software ST

      STSW-ST25R009

      Active

      Linux demo of ST25R3911B for Raspberry Pi using X-NUCLEO-NFC05A1

      ST25 - NFC / RFID Software ST

      STSW-STM8-NFC5

      Active

      Sources of STM8 firmware for X-NUCLEO-NFC05A1 NFC/RFID HF reader expansion board

      ST25 - NFC / RFID Software ST
      STSW-ST25R004

      Description:

      Antenna Matching Tool for ST25R NFC/HF reader family
      STSW-ST25R009

      Description:

      Linux demo of ST25R3911B for Raspberry Pi using X-NUCLEO-NFC05A1
      STSW-STM8-NFC5

      Description:

      Sources of STM8 firmware for X-NUCLEO-NFC05A1 NFC/RFID HF reader expansion board

EDA Symbols, Footprints and 3D Models

STMicroelectronics - ST25R3914

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST25R3914-AQWT
Active
VFQFPN 5X5X1 32L WETTABLE FLANKS Automotive Ecopack2

ST25R3914-AQWT

Package:

VFQFPN 5X5X1 32L WETTABLE FLANKS

Material Declaration**:

PDF XML

Marketing Status

Active

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
ST25R3914-AQWT No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel VFQFPN 5X5X1 32L WETTABLE FLANKS -40 125 THAILAND 3.1 / 1k

ST25R3914-AQWT

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

3.1 / 1k

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFQFPN 5X5X1 32L WETTABLE FLANKS

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

3.1 / 1k

Country of Origin

THAILAND

(*) 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