STMicroelectronics STM32WLE5 Microcontrollers
New LPWAN SoC supports LoRa RF protocol and other sub-1GHz modulation schemes
STMicroelectronics has expanded its series of STM32WLE5 wireless System-on-Chip (SoC) products, which combine LoRa® Low-Power Wide-Area Networking (LPWAN) and other power-efficient sub-1GHz radio communications capabilities with a low-power microcontroller in a single chip. ST now supplies the STM32WLE5 SoC in a 48-pin QFN package with a 7mm x 7mm footprint. It was already available in a 73-pin BGA package.
The STM32WLE5’s single die features ST’s STM32L4 ultra-low power MCU based on an Arm® Cortex®‐M4 core running at 48MHz, alongside Semtech SX126x sub-1GHz radio IP which is optimized to meet local radio equipment regulations worldwide. The integration of the MCU and the LPWAN radio in a single chip helps reduce Bill-of-Materials (BoM) costs and simplifies the design and assembly of end products.
With its low power consumption and small footprint, the STM32WLE5 enables the production of energy-efficient, compact, and lightweight new products for fast-growing industrial and IoT markets. The new 7mm x 7mm QFN48 package option is particularly well suited to a simple two-layer board design which further eases manufacturing and reduces BoM costs.
The world’s first LoRa-enabled SoC, the STM32WLE5 also supports other RF modulation schemes including (G)FSK, (G)MSK, and BPSK. Users have the flexibility to apply their choice of protocol stack, whether created in-house, sourced externally, or - like the LoRaWAN® and wM-Bus stacks available from ST and authorized partners - provided off-the-shelf.
Features of the integrated RF stage include a low-power 14dBm and a high-power 22dBm transmitter mode offering linear performance from 150MHz to 960MHz. The RF capability spans the sub-1GHz unlicensed frequency range, which ensures technical compatibility with RF regulations in all world markets.
Sensitivity down to -148dBm helps to maximize RF range. Only a single crystal is needed to synchronize the high-speed external clock and the radio, giving an additional BoM cost saving.
The NUCLEO-WL55JC STM32WL Nucleo-64 board provides an affordable and flexible way for users to try out new concepts and build prototypes with the STM32WL series of MCUs, choosing from the various combinations of performance, power consumption, and features.
The STM32WL Nucleo-64 board is supplied with the STM32WL comprehensive software library and various packaged software examples available with the STM32CubeWL MCU Package.
STM32WL MCU Series Overview
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STM32WL MCU Series
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