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STMicroelectronics RF Transceiver 32-Pin QFN Surface Mount SPI Interface 27.12MHz Operating Frequency ST25R3911B-AQFT
Specifications
| Country of Origin | Korea |
|---|---|
| Brand | STMicroelectronics |
| Height | 0.95mm |
| Length | 5mm |
| Model | ST25R3911B-AQFT |
| Width | 5mm |
| Mount Type | Surface |
| Series | ST25R3911B |
| Maximum Operating Temperature | 125°C |
| Package Type | QFN |
| Sub Type | Transceiver |
| Minimum Operating Temperature | -40°C |
| Interface Type | SPI |
| Pin Count | 32 |
| Maximum Supply Voltage | 5.5V |
| Minimum Supply Voltage | 2.4V |
| Modulation Technique | AM |
| Operating Band 1 Frequency | 27.12MHz |
| Number of Operating Bands | 1 |
Key Features
- Operates at 27.12MHz frequency suitable for NFC applications.
- Features automatic antenna tuning (AAT) technology for directly driven antennas.
- Supports SPI interface for easy integration with microcontrollers.
- Wide operating voltage range from 2.4V to 5.5V for versatile power supply compatibility.
- Compact 5mm x 5mm footprint with 0.95mm height in a surface mount QFN package.
- Includes low power capacitive sensor to detect card presence without activating reader field.
- Operates reliably across temperature range from -40°C to 125°C.
- Provides two differential low impedance antenna drivers for excellent RF efficiency.
Product Description
STMicroelectronics ST25R3911B-AQFT RF Transceiver is a state-of-the-art NFC Initiator and high-frequency (HF) Reader IC presented in a 32-Pin QFN surface mount package measuring 5mm by 5mm with a height of 0.95mm. It operates at a frequency of 27.12MHz and supports AM modulation technique. This device interfaces via SPI and supports a supply voltage range from 2.4V to 5.5V, making it suitable for a wide range of embedded and industrial applications.
The ST25R3911B-AQFT integrates an Analogue Front End (AFE) and advanced data framing capabilities, enabling implementation of standard and custom protocols such as MIFARE Classic. With built-in automatic antenna tuning (AAT) technology and two differential low impedance (1 Ohm) antenna drivers, it provides optimal RF performance and high antenna driving efficiency.
Its low power capacitive sensor enables card presence detection without activating the RF field, enhancing the device's suitability for energy-sensitive portable and infrastructure applications. The device is robust for operation in industrial and automotive environments, with a temperature tolerance from -40°C to 125°C.
This RF Transceiver is ideal for communication and wireless module IC roles in NFC infrastructure devices requiring highly integrated, low power, and flexible HF RFID reader ICs. Operates at 27.12MHz frequency suitable for NFC and HF RFID applications.
Includes automatic antenna tuning (AAT) for performance optimization with driven antennas. Supports SPI interface suitable for microcontroller integration. Wide supply voltage range of 2.4V to 5.5V ensures flexible power management.
Compact 5mm x 5mm QFN 32-pin surface mount package with 0.95mm height. Incorporates a low power capacitive sensor to detect card presence without RF activation. Thermally rated for operation from -40°C to 125°C for industrial use.
Two differential antenna drivers with 1 Ohm low impedance enhance RF efficiency. Enables standard and custom NFC protocol implementations.
Application domains include industrial wireless communication, NFC infrastructure, IoT systems, and embedded system designs requiring reliable HF RFID communication with low power consumption.
Explore more RF ICs and NFC solutions by browsing the Electronics & Electricals category on EnvMart for comprehensive wireless system integration needs.
Explore more products in our RF Transceiver IC category.
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Frequently Asked Questions
It operates at a frequency of 27.12MHz, making it suitable for NFC and HF RFID applications.
The device supports a wide supply voltage range from 2.4V to 5.5V, allowing for flexible power management.
The QFN package measures 5mm x 5mm with a height of 0.95mm.
It operates reliably across a temperature range from -40°C to 125°C, suitable for industrial environments.
This RF transceiver has 32 pins.
It utilizes AM modulation technique for its operations.
The low power capacitive sensor detects card presence without activating the RF field, enhancing energy efficiency.
The AAT technology optimizes performance with directly driven antennas, improving RF efficiency.
It is ideal for applications in industrial wireless communication, NFC infrastructure, IoT systems, and embedded system designs.
The country of origin for this product is Korea.
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