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STMicroelectronics ST25R3911B-DISCO

Name: ST25R3911B-DISCO
Brand: STMicroelectronics
SKU: ST25R3911B-DISCO
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ST25R3911B-DISCO

Manufacturer:: STMicroelectronics

Category:: RF, RFID, Wireless Evaluation Boards

Package:

Datasheet:: ST25R3911B-DISCO.pdf

Description:: DISCOVERY KIT FOR ST25R3911B

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,281

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Product details

Overview

ST25R3911B-DISCO from STMicroelectronics is a ready-to-use Discovery kit built around the ST25R3911B high-performance HF reader/NFC initiator IC, supporting ISO 14443A/B, ISO 15693, FeliCa™, and ISO 18092 (NFCIP-1) active/passive modes with up to 1.4 W RF output power, VHBR (3.4 Mbit/s PICC→PCD), and automatic antenna tuning (AAT). It integrates an STM32L476RET6 MCU (512 kB Flash), on-board dual-turn 105 mm × 52 mm antenna, micro-USB interface, and six status LEDs for field/protocol indication - used in access control, ticketing, and industrial NFC evaluation.

For engineers reviewing the ST25R3911B-DISCO datasheet, ST25R3911B-DISCO pinout, ST25R3911B-DISCO application, or ST25R3911B-DISCO equivalent, key selection considerations include VHBR vs. NFC Forum matching configuration, SPI (6 Mbit/s) host interface compatibility, differential/single-ended antenna drive capability, capacitive/inductive wake-up support, and AAT-enabled operation near metal or in dynamic environments.

Technical Context

The ST25R3911B-DISCO implements the ST25R3911B analog front-end (AFE) paired with an STM32L476RET6 ARM Cortex-M4 microcontroller running embedded firmware that exposes register-level control via USB-hosted GUI. It supports both transparent and stream modes for custom protocol framing (e.g., MIFARE Classic), and enables real-time AAT visualization through software feedback.

Hardware flexibility includes dual matching options: VHBR-optimized (3.4 Mbit/s) using C404/C410/R401/R402, or NFC Forum-compliant (848 kbps HBR, +10% read range, Q-factor doubled) via component swaps per Table 1. Wake-up is supported via low-power capacitive sensor or amplitude/phase-based inductive detection - independent of active RF field.

Key Specifications

Parameter	Value and Actual Design Meaning
Core IC	ST25R3911B HF reader/NFC initiator with integrated AFE and DPO
MCU	STM32L476RET6: 32-bit ARM Cortex-M4, 512 kB Flash, ultra-low-power operation
RF Output Power	Up to 1.4 W into differential antenna; supports single-ended dual-antenna drive
Data Rates	VHBR: 3.4 Mbit/s (PICC→PCD), 6.8 Mbit/s (AFE/PCD→PICC); HBR: up to 848 kbps (NFC Forum mode)
Host Interface	6 Mbit/s SPI, UART, and I²C; micro-USB for power + communication
Antenna	On-board two-turn 105 mm × 52 mm PCB etched antenna with VHBR/NFC Forum selectable matching
Wake-up Modes	Capacitive sensor (ultra-low-power, no RF field) and inductive (amplitude/phase detection)

Availability

ST25R3911B-DISCO is available at Aetrix Electronics and suitable for NFC reader development, contactless payment terminal prototyping, and industrial asset tagging requiring stable component supply, rapid evaluation turnaround, and production-ready reference design validation.

Supply support for ST25R3911B-DISCO includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power management ICs, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer applications.

The ST25R3911B-DISCO belongs to ST's ST25 NFC & RFID Discovery kit product line, engineered to accelerate development of high-performance, multi-standard HF readers with emphasis on metal-tolerant operation, low-power wake-up, and VHBR/NFC Forum interoperability.

FAQ

What interfaces does the ST25R3911B-DISCO support for host communication?

The board supports USB (via micro-USB connector), 6 Mbit/s SPI, UART, and I²C interfaces. USB is used for both power delivery and communication with the provided PC GUI; SPI, UART, and I²C allow direct integration into existing embedded systems without requiring a PC host.

How does the automatic antenna tuning (AAT) function on this kit?

AAT dynamically adjusts matching network capacitance in real time to maintain optimal RF power transfer as environmental conditions change - such as proximity to metal or temperature drift. The GUI displays tuning status and impact, enabling immediate visual verification of resonance stability during evaluation.

Can the ST25R3911B-DISCO operate in both VHBR and NFC Forum modes simultaneously?

No - VHBR and NFC Forum matching are hardware-configured alternatives. Switching requires physical replacement of four components (C404, C410, R401, R402) per Table 1. VHBR enables 3.4 Mbit/s operation; NFC Forum mode doubles Q-factor for +10% read range at ≤848 kbps but disables >1.6 Mbps rates.

Does the kit support MIFARE Classic authentication and emulation?

Yes - via transparent and stream modes, the ST25R3911B offloads only AFE functions while allowing the STM32L476RET6 to handle framing, CRC, and cryptographic operations. Reference firmware and documentation for MIFARE Classic compliance are available on ST's NFC pages at www.st.com.

ST25R3911B-DISCO Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Bulk

Product Status:: Active

Type:: RFID Reader

Frequency:: 13.56MHz

Contents:: Board(s)

Utilized IC / Part:: ST25R3911B

ST25R3911B-DISCO FAQ

1.How can I place an order for ST25R3911B-DISCO through Aetrix?

Please submit a Request for Quotation (RFQ) for ST25R3911B-DISCO on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ST25R3911B-DISCO reliable?

The price and inventory of ST25R3911B-DISCO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25R3911B-DISCO is usually 5 days.

3.What payment methods are accepted for ST25R3911B-DISCO?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25R3911B-DISCO transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ST25R3911B-DISCO?

ST25R3911B-DISCO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ST25R3911B-DISCO order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ST25R3911B-DISCO?

For technical support, including ST25R3911B-DISCO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25R3911B-DISCO requirements.

6.How does Aetrix verify that ST25R3911B-DISCO is sourced from the original manufacturer or authorized distributors?

All ST25R3911B-DISCO products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ST25R3911B-DISCO meets industry standards.

7.What is the process for return or replacement of ST25R3911B-DISCO?

All ST25R3911B-DISCO units undergo pre-shipment inspection (PSI). If there is an issue with ST25R3911B-DISCO, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ST25R3911B-DISCO part is unused and in its original packaging.

Return procedure for ST25R3911B-DISCO:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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