Design Win

4-Layer Reference design based on IPD "BALFLB-WL-07D3" with STM32WL UFBGA MCU - Low Band - High Power

Download databrief

Product overview


The main objective of the STM32WL5x and STM32WLEx reference designs is to recommend a layout and associated BOM for dedicated applications (these boards are not for sale).

Performance has been assessed and FCC and CE certification checks have been done by an independent company.

These reference designs can be manufactured from files that can be downloaded from the website. A complete application can be prototyped thanks to the access to all GPIOs.

Sensitive layout parts can be extracted and pasted in any user board design with the same PCB characteristics and feature set.

The STM32WL5x and STM32WLEx reference designs are provided with the STM32WL comprehensive software HAL library. The STM32CubeWL MCU Package contains many software examples developed with the STM32WL Nucleo-64 board (NUCLEO-WL55JC). These examples can be easily adapted for STM32WL5x and STM32WLEx reference designs. A dedicated delivery is provided for radio AT_Slave firmware that is fully compatible with the selected STM32WL5x or STM32WLEx reference board.

The firmware source code corresponding to the selected reference design is available on This associated firmware is distributed under license BSD-3-Clause (

Using the reference designs to design the user application helps to get the right RF performance and to pass certification.

  • All features

    • Includes ST state-of-the-art patented technology
    • Reference designs
      • Fully open hardware platforms
      • Suitable for rapid prototyping of end nodes based on LoRaWAN®, Sigfox™, WM-Bus, and many other proprietary protocols
    • STM32WL5x or STM32WLEx microcontroller
      • Multi-protocol LPWAN dual-core 32-bit Arm® Cortex® -M4/M0+ at 48 MHz
      • Ultra-low power
      • RF transceiver (150 MHz to 960 MHz frequency range) supporting LoRa®, (G)FSK, (G)MSK, and BPSK modulations
      • Up to 256-Kbyte flash memory and 64-Kbyte SRAM
    • Oscillators
      • 32.768 kHz LSE crystal
      • 32 MHz HSE (on-board TCXO or crystal XO)
    • Connectors
      • 2x HE10-20
      • SMA antenna
      • 2-point UART
    • Designs with different references show different layouts. Picture is not contractual.
    • Power
      • 1.8 V to 3.6 V through external sources
    • Debug/programming
      • Through JTAG/serial-wire debug port to connect an external ST-LINK
    • Software
      • Comprehensive free software libraries and examples available with the STM32CubeWL MCU Package usable with adapted BSP

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
- Industrial - -




Material Declaration**:

Marketing Status






RoHS Compliance Grade


(**) The Material Declaration forms available on 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

Swipe or click the button to explore more details Don't show this again
Part Number
Marketing Status
Budgetary Price (US$)*/Qty
Order from ST
Order from distributors
Packing Type
Country of Origin
Core Product
Available at distributors

Distributor availability of STDES-WL5I4IHL

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office


Budgetary Price (US$)*/Qty:
Packing Type:
Country of Origin:

Part Number:




Core Product:


Swipe or click the button to explore more details Don't show this again

(*) 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