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STMicroelectronics X-NUCLEO-S2868A2

Name: X-NUCLEO-S2868A2
Brand: STMicroelectronics
SKU: X-NUCLEO-S2868A2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: X-NUCLEO-S2868A2

Manufacturer:: STMicroelectronics

Category:: Expansion Boards, Daughter Cards

Package:

Datasheet:: X-NUCLEO-S2868A2.pdf

Description:: SUB-1 GHZ 868 MHZ RF EXPANSION S

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,087

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Product details

Overview

X-NUCLEO-S2868A2 from STMicroelectronics is an STM32 Nucleo-compatible sub-1 GHz RF expansion board based on the S2-LP ultra-low power transceiver, operating in the 868–930 MHz ISM band with +16 dBm programmable output power, -130 dBm receiver sensitivity, and support for 2-FSK/4-FSK/GFSK/OOK/ASK modulation schemes. It enables IEEE 802.15.4g-compliant wireless M-Bus and Sigfox-ready P2P communication.

For engineers reviewing the X-NUCLEO-S2868A2 datasheet, X-NUCLEO-S2868A2 pinout, X-NUCLEO-S2868A2 application, or X-NUCLEO-S2868A2 equivalent, this board delivers verified SPI-interfaced RF functionality with Arduino UNO R3 and ST morpho connector compatibility, 128-byte RX/TX FIFOs, hardware CRC/FEC/whitening, and BALF-SPI2-01D3 integrated balun filtering.

Technical Context

The board implements the S2-LP transceiver via dedicated SPI (SDI/SDO/SCLK/CSN) and GPIO control lines (GPIO0–GPIO3, SDN, RESET), enabling full register access and protocol engine management. Hardware acceleration includes IEEE 802.15.4g packet formatting with dual SYNC word detection, whitening, forward error correction, and automatic ACK/retransmission timeout handling.

RF front-end integration features the BALF-SPI2-01D3 50 Ω balun with harmonic filtering optimized for 868–930 MHz, SMA antenna interface, and matched VDDVCOTX/VDDRXDIG supply domains. Power consumption is characterized at 7 mA RX and 10 mA TX (+10 dBm), supporting battery-operated long-life deployments.

Key Specifications

Parameter	Value and Actual Design Meaning
RF Band	868–930 MHz ISM band; enables regional compliance for EU 868 MHz SRD and global sub-GHz IoT deployments.
Modulation Support	2-FSK, 4-FSK, 2-GFSK, 4-GFSK, OOK, ASK; allows flexible PHY layer selection for regulatory and link budget optimization.
Output Power	Programmable up to +16 dBm; supports extended range without external PA, compliant with ETSI EN 300 220 limits.
Receiver Sensitivity	-130 dBm @ 1.2 kbps (2-FSK); enables robust reception in low-SNR industrial or underground environments.
Air Data Rate	0.1–500 kbps; accommodates both narrowband telemetry (e.g., smart metering) and higher-throughput sensor mesh traffic.
FIFO Size	128-byte RX and TX buffers; reduces host MCU interrupt load and supports burst transmission without packet loss.
Protocol Engine	Hardware-assisted IEEE 802.15.4g packet handling with CRC-16, FEC, whitening, dual SYNC detection; offloads MAC-layer framing from STM32 host.

Availability

X-NUCLEO-S2868A2 is available at Aetrix Electronics and suitable for smart metering infrastructure, wireless M-Bus utility networks, Sigfox endpoint development, and STM32-based LPWAN prototyping requiring stable component supply and rapid evaluation capability.

Supply support for X-NUCLEO-S2868A2 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, analog ICs, MEMS, power devices, and RF solutions for industrial, automotive, and consumer applications.

This board belongs to ST's X-NUCLEO ecosystem of STM32 Nucleo expansion boards, engineered to accelerate RF, sensor, power, and connectivity prototyping with standardized mechanical and electrical interfaces.

FAQ

Does X-NUCLEO-S2868A2 require external firmware to operate?

No. The board ships with sample P2P firmware and integrates seamlessly with STM32CubeMX and STM32CubeFW_S2LP middleware. Pre-certified Sigfox and 6LoWPAN stacks are available via ST's official firmware packages, eliminating need for custom RF driver development.

Can X-NUCLEO-S2868A2 be used with non-STM32 hosts?

Yes - it interfaces via standard SPI and GPIO signals. While designed for STM32 Nucleo, the board's Arduino UNO R3 and ST morpho pinouts allow connection to other MCUs (e.g., ESP32, nRF52) provided they meet voltage level (3.3 V), timing, and interrupt requirements for S2-LP register access.

What antenna options are supported besides the SMA connector?

The SMA port supports standard 50 Ω RF antennas. PCB trace antennas or chip antennas may be substituted by removing the onboard balun and routing differential RF traces directly to the S2-LP RFIO pins, per AN4903 layout guidelines - but require RF validation and impedance tuning.

Is wireless M-Bus mode fully hardware-accelerated?

Yes. The S2-LP transceiver provides native hardware support for wireless M-Bus Mode T and Mode S physical layer parameters, including specific symbol rates, preamble patterns, and CRC-16 calculation. The board's firmware abstraction layer exposes these modes directly via STM32Cube APIs.

X-NUCLEO-S2868A2 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Bulk

Product Status:: Active

Platform:: Nucleo

Type:: RF

Function:: Transceiver

Utilized IC / Part:: S2-LP

Contents:: Board(s)

X-NUCLEO-S2868A2 FAQ

1.How can I place an order for X-NUCLEO-S2868A2 through Aetrix?

Please submit a Request for Quotation (RFQ) for X-NUCLEO-S2868A2 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 X-NUCLEO-S2868A2 reliable?

The price and inventory of X-NUCLEO-S2868A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X-NUCLEO-S2868A2 is usually 5 days.

3.What payment methods are accepted for X-NUCLEO-S2868A2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X-NUCLEO-S2868A2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for X-NUCLEO-S2868A2?

X-NUCLEO-S2868A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your X-NUCLEO-S2868A2 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 X-NUCLEO-S2868A2?

For technical support, including X-NUCLEO-S2868A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X-NUCLEO-S2868A2 requirements.

6.How does Aetrix verify that X-NUCLEO-S2868A2 is sourced from the original manufacturer or authorized distributors?

All X-NUCLEO-S2868A2 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 X-NUCLEO-S2868A2 meets industry standards.

7.What is the process for return or replacement of X-NUCLEO-S2868A2?

All X-NUCLEO-S2868A2 units undergo pre-shipment inspection (PSI). If there is an issue with X-NUCLEO-S2868A2, 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 X-NUCLEO-S2868A2 part is unused and in its original packaging.

Return procedure for X-NUCLEO-S2868A2:

1.Submit a request within 90 days.

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

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