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  • The ST25R3912/3 are highly integrated NFC Initiators / HF Reader ICs, 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 ST25R3912/3 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 (ST25R3913 only), the device is optimized for applications with directly driven antennas. The ST25R3912/3 are alone in the domain of HF reader ICs as they contain two differential low impedance (1 Ohm) antenna drivers.
    The ST25R3912/3 include several features that make them very suited for low power applications. The presence of a card can 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 (phase or amplitude).
    The ST25R3912/3 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

    • 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
    • Inductive sensing - Wake-up
    • Automatic antenna tuning system providing tuning of antenna LC tank (ST25R3913 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
    • ST25R3912: VFQFPN32, 5 mm x 5 mm package with wettable flanks
    • ST25R3913: QFN32, 5 mm x 5 mm package
    • WLCSP, 3.0 mm x 2.8 mm package (ST25R3912 only)

Sample & Buy

Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Order from Distributors
Order from ST
ST25R3913-AQWT VFQFPN 5X5X1 32L WETTABLE FLANKS Tape And Reel
Preview
2.6 1000 EAR99 - No availability of distributors reported, please contact our sales office
ST25R3913-AQFT VFQFPN 5X5 32L PAD 3.5X3 PUNCHED Tape And Reel
NRND
2.6 1000 EAR99 - No availability of distributors reported, please contact our sales office

ST25R3913-AQWT

Package

VFQFPN 5X5X1 32L WETTABLE FLANKS

Packing Type

Tape And Reel

Unit Price (US$)

2.6*

Marketing Status

Preview

Unit Price (US$)

2.6

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

ST25R3913-AQFT

Package

VFQFPN 5X5 32L PAD 3.5X3 PUNCHED

Packing Type

Tape And Reel

Unit Price (US$)

2.6*

Marketing Status

NRND

Unit Price (US$)

2.6

Quantity

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

Related Applications

Medical and Healthcare

Embedded Software

    • Part Number

      Antenna Matching Tool for ST25R NFC/HF reader family

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

Evaluation Tools

    • Part Number

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

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS11794
      High performance HF reader / NFC initiator for payment applications with 1 W output power
      6.0
      2.01 MB
      PDF
      DS11794

      High performance HF reader / NFC initiator for payment applications with 1 W output power

    • Description Version Size Action
      AN4974
      Antenna matching for ST25R3911B/ST25R391x devices
      2.0
      3 MB
      PDF
      AN4914
      Automatic Antenna Tuning (AAT) of ST25R3911B/ST25R391x devices
      2.0
      1.9 MB
      PDF
      AN5043
      Layout recommendations for the design of boards with ST25R3911B/ST25R391x devices
      4.0
      873.78 KB
      PDF
      AN4985
      Wake-up mode of the ST25R3911B/ST25R391x
      1.0
      805.57 KB
      PDF
      AN4974

      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

Presentations & Training Material

    • Description Version Size Action
      ST25R3911B-15 product presentation 1.0
      3.4 MB
      PDF

      ST25R3911B-15 product presentation

Publications and Collaterals

    • Description Version Size Action
      High performance NFC/RFID readers 1.0
      981.89 KB
      PDF

      High performance NFC/RFID readers

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      NFC solutions from ST 1.0
      3.53 MB
      PDF

      Electric vehicle (EV) ecosystem

      NFC solutions from ST

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST25R3913-AQFT
NRND
VFQFPN 5X5 32L PAD 3.5X3 PUNCHED Industrial N/A
ST25R3913-AQWT
Preview
VFQFPN 5X5X1 32L WETTABLE FLANKS Industrial Ecopack2

ST25R3913-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

N/A

ST25R3913-AQWT

Package:

VFQFPN 5X5X1 32L WETTABLE FLANKS

Material Declaration**:

PDF XML

Marketing Status

Preview

Package

VFQFPN 5X5X1 32L WETTABLE FLANKS

Grade

Industrial

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.