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  • 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.

    Key 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, 5x5 mm package with wetable flank or wafer delivery

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ST25T & ST25DV-I2C read range evaluation with ST25R3911B reader - Finding the best antenna configuration for your NFC/RFID application

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    • Part number
      Status
      Description
      Type
      Supplier

      X-NUCLEO-NFC05A1

      Active

      NFC card reader expansion board based on ST25R3911B for STM32 and STM8 Nucleos

      STM32 ODE Connect HW ST
      X-NUCLEO-NFC05A1

      Description:

      NFC card reader expansion board based on ST25R3911B for STM32 and STM8 Nucleos
    • Part number
      Status
      Description
      Type
      Supplier

      STSW-ST25PC001

      Active

      Windows® PC software for ISO15693, ISO14443-A/B, NFC and industrial readers

      ST25 - NFC / RFID Software ST

      STSW-ST25R001

      Active

      PC software installer for ST25R3911B-DISCO

      ST25 - NFC / RFID Software ST

      STSW-ST25R002

      Active

      Sources of STM32L4 based firmware for ST25R3911B-DISCO

      ST25 - NFC / RFID Software ST

      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-ST25RFAL001

      Active

      RFAL for ST25R3911B

      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-ST25PC001

      Description:

      Windows® PC software for ISO15693, ISO14443-A/B, NFC and industrial readers
      STSW-ST25R001

      Description:

      PC software installer for ST25R3911B-DISCO
      STSW-ST25R002

      Description:

      Sources of STM32L4 based firmware for ST25R3911B-DISCO
      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-ST25RFAL001

      Description:

      RFAL for ST25R3911B
      STSW-STM8-NFC5

      Description:

      Sources of STM8 firmware for X-NUCLEO-NFC05A1 NFC/RFID HF reader expansion board
    • Part number
      Status
      Description
      Type
      Supplier

      ST25R3911B-DISCO

      Active

      Discovery kit for ST25R3911B high performance HF reader / NFC initiator with 1.4 W output power, VHBR and AAT

      ST25 NFC/RFID Eval Boards ST

      ST25R3911B-EMVCO

      Active

      EMVCo reference design for the ST25R3911B high performance HF reader

      ST25 NFC/RFID Eval Boards --
      ST25R3911B-DISCO

      Description:

      Discovery kit for ST25R3911B high performance HF reader / NFC initiator with 1.4 W output power, VHBR and AAT
      ST25R3911B-EMVCO

      Description:

      EMVCo reference design for the ST25R3911B high performance HF reader

EDA Symbols, Footprints and 3D Models

STMicroelectronics - ST25R3911B

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.

Symbols

Symbols

Footprints

Footprints

3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST25R3911B-AQFT
NRND
VFQFPN 5X5 32L PAD 3.5X3 PUNCHED Industrial Ecopack2
ST25R3911B-AQWT
Active
VFQFPN 5X5X1 32L WETTABLE FLANKS Industrial Ecopack2
ST25R3911B-ASWB
Active
US WF V.I. Industrial N/A

ST25R3911B-AQFT

Package:

VFQFPN 5X5 32L PAD 3.5X3 PUNCHED

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

VFQFPN 5X5 32L PAD 3.5X3 PUNCHED

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST25R3911B-AQWT

Package:

VFQFPN 5X5X1 32L WETTABLE FLANKS

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 5X5X1 32L WETTABLE FLANKS

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST25R3911B-ASWB

Package:

US WF V.I.

Material Declaration**:

Marketing Status

Active

Package

US WF V.I.

Grade

Industrial

RoHS Compliance Grade

N/A

(**) 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.

Step 1: Purchase Discovery kit, Nucleo board or Evaluation board

X-NUCLEO-NFC05A1

NFC card reader expansion board based on ST25R3911B for STM32 and STM8 Nucleos

ST25R3911B-DISCO

Discovery kit for ST25R3911B high performance HF reader / NFC initiator with 1.4 W output power, VHBR and AAT

ST25R3911B-EMVCO

EMVCo reference design for the ST25R3911B high performance HF reader

Step 2: Download associated software

X-CUBE-NFC5

High performance HF reader/NFC initiator IC software expansion for STM32Cube

STSW-ST25PC001

Windows® PC software for ISO15693, ISO14443-A/B, NFC and industrial readers

STSW-ST25R001

PC software installer for ST25R3911B-DISCO

STSW-ST25R002

Sources of STM32L4 based firmware for ST25R3911B-DISCO

STSW-ST25R004

Antenna Matching Tool for ST25R NFC/HF reader family

STSW-ST25R009

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

Step 3: Get trained

ST253911B-12 product presentation

ST253911B-12 product presentation

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
ST25R3911B-AQFT Available at 5 distributors

Distributor availability ofST25R3911B-AQFT

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 630 1 Order Now
RS COMPONENTS EUROPE 3244 1 Order Now
ARROW EUROPE 12722 0 Order Now
ARROW AMERICA 12000 3000 Order Now
MOUSER WORLDWIDE 3207 1 Order Now

Distributor reported inventory date: 2020-12-01

Distributor Name

COMPEL

Stock

630

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

3244

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

12722

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

12000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

3207

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-12-01

Buy Direct
NRND
EAR99 NEC Tape And Reel VFQFPN 5X5 32L PAD 3.5X3 PUNCHED -40 125 SOUTH KOREA 2.8 / 1k
ST25R3911B-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 2.8 / 1k
ST25R3911B-ASWB No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Not Applicable US WF V.I. -40 125 CHINA 2.8 / 1k

ST25R3911B-AQFT

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

2.8 / 1k

Distributor availability ofST25R3911B-AQFT

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 630 1 Order Now
RS COMPONENTS EUROPE 3244 1 Order Now
ARROW EUROPE 12722 0 Order Now
ARROW AMERICA 12000 3000 Order Now
MOUSER WORLDWIDE 3207 1 Order Now

Distributor reported inventory date: 2020-12-01

Distributor Name

COMPEL

Stock

630

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

3244

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

12722

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

12000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

3207

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-12-01

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFQFPN 5X5 32L PAD 3.5X3 PUNCHED

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

2.8 / 1k

Country of Origin

SOUTH KOREA

ST25R3911B-AQWT

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

2.8 / 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

2.8 / 1k

Country of Origin

THAILAND

ST25R3911B-ASWB

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

2.8 / 1k

ECCN (EU)

NEC

Packing Type

Not Applicable

Package

US WF V.I.

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

2.8 / 1k

Country of Origin

CHINA

(*) 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