ST25R3920B

Active
Design Win Education
Save to myST

Automotive high performance NFC reader for CCC digital key and car center console

Download datasheet
Order Direct

Product overview

Description

The ST25R3920B is an automotive grade high performance NFC universal device supporting NFC initiator, NFC target, NFC reader and NFC card emulation modes.

Designed for CCC (car connectivity consortium) digital key applications, the ST25R3920B enables fast product development for car access/start applications in areas like door handle or center console, and enables additional functionality, like pairing or NFC card protection combined with a Qi charger. Being very robust and noise tolerant while at the same time reducing electromagnetic emission, the device works even under harsh conditions, enabling an easier certification.

The device includes an advanced analog front end (AFE) and a highly integrated data framing system for ISO18092 passive and active initiator, ISO 18092 passive and active target, NFC-A/B (ISO14443A/B) reader including higher bit rates, NFC-F (FeliCa™) reader, NFC-V (ISO15693) reader up to 53 kbps, and NFC-A / NFC-F card emulation.

Special stream and transparent modes of the AFE and framing system is used to implement other custom protocols in reader or card emulation modes.

The ST25R3920B features high RF power with dynamic power output to directly drive antennas at high efficiency, achieving large interaction distance even with small antenna sizes common in door handles. The device include additional features, making it incomparable for low power applications. It offers low power card detection by performing a measurement of the amplitude or phase of the antenna signal while reducing power consumption to a minimum.

The ST25R3920B is designed to operate from a wide power supply range (2.6 to 5.5 V from -40 °C to +105 °C, 2.4 to 5.5 V from -20 °C to +105 °C), and a wide peripheral IO voltage range (from 1.65 to 5.5 V).

Due to this combination of high RF output power, low power modes, wide supply range and AEC-Q100 grade 2 qualification the device is perfectly suited for automotive applications.

  • All features

    • AEC-Q100 qualified
    • Operating modes
      • Reader/writer
      • Card emulation
      • Active and passive peer to peer
    • RF communication
      • EMVCo® 3.1a analog and digital compliant
      • NFC-A / ISO14443A up to 848 kbit/s
      • NFC-B / ISO14443B up to 848 kbit/s
      • NFC-F / FeliCa™ up to 424 kbit/s
      • NFC-V / ISO15693 up to 53 kb/s
      • NFC-A / ISO14443A (106 kbit/s) and NFC-F / FeliCa™ (212/424 kbit/s) card emulation
      • Active and passive peer to peer initiator and target modes, up to 424 kbit/s
      • Low level modes to implement MIFARE Classic® compliant or other custom protocols
    • Key features
      • Dynamic power output (DPO) controls the field strength to stay within given limits
      • Active wave shaping (AWS) reduces over-and under-shoots
      • Noise suppression receiver (NSR) allows reception in noisy environment
      • Automatic antenna tuning (AAT) via variable capacitor
      • Integrated EMVCo® 3.1a compliant EMD handling
      • Automatic gain control and squelch feature to maximize SNR
      • Low power NFC active and passive target modes
      • Adjustable ASK modulation depth, from 0 to 82%
      • Integrated regulators to boost system PSRR
      • AM/PM and I/Q demodulator with baseband channel summation or automatic channel selection
      • Possibility to drive two independent single ended antennas
      • Measurement of antenna voltage amplitude and phase, RSSI, on-chip supply and regulated voltages
    • External communication interfaces
      • 512-byte FIFO
      • Serial peripheral interface (SPI) up to 5 Mbit/s
      • I2C with up to 400 kbit/s in Fast-mode, 1 Mbit/s in Fast-mode Plus, and 3.4 Mbit/s in High-speed mode
    • Electrical characteristics
      • Wide supply voltage and ambient temperature range (2.6 to 5.5 V from -40 °C to +105 °C, 2.4 to 5.5 V from -20 °C to +105 °C)
      • Wide peripheral communication supply range, from 1.65 to 5.5 V
      • Quartz oscillator capable of operating with 27.12 MHz crystal with fast start-up
    Read more Read less

eDesignSuite

eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Power Management Design Center

Thermal-electrical Simulators for Components

Signal Conditioning Design Tool

NFC/RFID Calculators

Choose design tool:
Power Management Design Center

Power Supply Design Tool

• SMPS design, by topology, by type and by product
• PFC design with analog and digitial control
• Supports various PCB configurations
Choose type:
DC/DC
AC/DC
Solar Battery Charger
Power Management Design Center

LED Lighting Design Tool

• Handles AC-DC and DC-DC design in common topologies
• Displays interactive and annotated schematic
• Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data
Choose type:
DC/DC
AC/DC
Power Management Design Center

Digital Power Workbench

• Provides a step-by-step optimized design of power section and control loop
• Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs
Power Management Design Center

Power Tree Designer

• Specify input/output power for each node in the tree
• Check for consistency
• Design each individual node
Choose design tool:
Thermal-electrical Simulators for Components

AC Switches Simulator

• Select ratings and application waveforms
• Get junction temperature and blocking voltage graphs
• Search and sort suitable devices
Thermal-electrical Simulators for Components

Rectifier Diodes Simulator

• Select ratings and application waveforms
• Estimate power losses
• Search and sort suitable devices
Thermal-electrical Simulators for Components

STPOWER Studio

• Supports long mission profiles
• Provides power loss and temperature graphs
• Helps define heatsink thermal properties
Thermal-electrical Simulators for Components

Twister Sim

• Help select the right ViPOWER Automotive power device
• Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis
• Supports various PCB configurations
Thermal-electrical Simulators for Components

TVS Simulator

• Specify system ratings and surge waveform
• Search and sort suitable devices
Thermal-electrical Simulators for Components

Estimate

• Build simple schematics and firmware inputs in minutes
• Quickly generate reliable estimates of battery life, system power consumption and bill of materials costs
Thermal-electrical Simulators for Components

PCB Thermal Simulator

• Thermal analysis of a PCB from Gerber files.
• Possibility to add heat sources, heat sinks, copper areas and thermal paths.
• Powerful server-side engine for rendering and simulation.
• Thermal results shown graphically via 2D table.
Choose design tool:
Signal Conditioning Design Tool

Active Filters

• Handles multi-stage-designs and common topologies
• Returns circuit component values
• Provides gain, phase and group delay graphs
• Low Pass, High Pass and Band Pass
Signal Conditioning Design Tool

Comparators

• Handles most common configurations
• Returns circuit components values
• Provides I/O signal waveforms
• Inverting, Non Inverting, Window
Signal Conditioning Design Tool

Low side Current Sensing

• Returns circuit component values
• Provides current error graphs
Signal Conditioning Design Tool

High side Current Sensing

• Provides current error graphs.
• Help to select the right High side current sensing and shunt devices.
Choose design tool:
NFC/RFID Calculators

NFC Inductance

• Input geometry and substrate properties
• Get antenna impedance
NFC/RFID Calculators

UHF Link Budget

• Enter forward and reverse link characteristics
• The tool returns link budget estimate
NFC/RFID Calculators

NFC Tuning Circuit

• Enter antenna parameter and matching target
• Select the topology of the matching network
• The tool returns component values for the desired design targets

You might also like...

STSW-ST25R-LIB

ST25 embedded NFC library for ST25 reader and tag products

STSW-ST25RFAL002

RF/NFC abstraction layer for ST25R3916B / ST25R3920B and derivatives

STSW-ST25R004

Antenna Matching Tool for ST25R NFC/HF reader family

Recommended for you

EDA Symbols, Footprints and 3D Models

STMicroelectronics - ST25R3920B

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.

Please select one model supplier :

Start your design with UltraLibrarian
Start your design with SamacSys
Symbols

Symbols

Footprints

Footprints

3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Longevity Commitment Longevity Starting Date Material Declaration**
ST25R3920B-AQWT
Active
VFQFPN 5X5X1 32L WETTABLE FLANKS Automotive Ecopack2 - -

ST25R3920B-AQWT

Package:

VFQFPN 5X5X1 32L WETTABLE FLANKS

Material Declaration**:

More Info

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

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

Products

Search History

Bookmark

Please log in  to show your saved searches.

▼

Did you know?

Please provide email

Please enter code

Congratulations!

Simple subscription

Congratulations!

x

You can start following this product to receive updates when new Resources, Tools and SW become available. It's easy and takes only 1 minute.

You can start following this product to receive updates when new Resources, Tools and SW become available. It's easy and takes only 1 minute.

You can start following this product to receive updates when new Resources, Tools and SW become available. It's easy and takes only 1 minute.

Invalid code, please check the code sent to your email address and validate again. In case you did not receive any code please select 'I did not receive code'

You can start following this product to receive updates when new Resources, Tools and SW become available. It's easy and takes only 1 minute.

Please review our Privacy Statement that describes how we process your profile information and how to assert your personal data protection rights

You are now subscribed to
- ST25R3920B

You can re-use the validation code to subscribe to another product or application.

Sorry, there was a problem on our servers. Please try again.