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STMicroelectronics STM32WLE5CBU6
- Part No.:
- STM32WLE5CBU6
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32WLE5CBU6.pdf
- Description:
- IC RF TXRX+MCU ISM<1GHZ 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,647
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Product details
Overview
STM32WLE5CBU6 from STMicroelectronics is a multiprotocol LPWAN 32-bit Arm® Cortex®-M4 microcontroller integrating LoRa®, (G)FSK, (G)MSK, and BPSK radio transceivers, 256 KB flash, 64 KB SRAM, and hardware AES-256 encryption. It operates from 150–960 MHz, achieves –148 dBm LoRa® RX sensitivity (SF12, 10.4 kHz), and delivers up to +22 dBm TX output power. Designed for battery-powered IoT end-nodes in smart metering, asset tracking, and environmental monitoring.
For engineers reviewing the STM32WLE5CBU6 datasheet, STM32WLE5CBU6 pinout, STM32WLE5CBU6 application, or STM32WLE5CBU6 equivalent, key selection criteria include sub-GHz RF performance across LoRaWAN®/Sigfox™/W-MBus protocols, ultra-low-power modes (31 nA shutdown), integrated SMPS, and dual-core secure boot support with PKA and PCROP.
Technical Context
The STM32WLE5CBU6 integrates a single Arm Cortex-M4 core with ART Accelerator enabling zero-wait-state execution at 48 MHz, alongside a fully autonomous sub-GHz radio subsystem supporting simultaneous protocol stack execution. Its RF front-end includes programmable TX power (–10 to +22 dBm), configurable IF bandwidths, and RF-PLL with fractional-N synthesis for precise channel spacing.
Power management combines an embedded SMPS step-down converter, LDO fallback, and five low-power modes - including Stop2 (+RTC, 1.07 µA) and Standby (+RTC, 360 nA) - all coordinated via dedicated power control logic and voltage detectors (BOR/PVD). The radio and MCU domains operate independently, allowing concurrent RF listening and CPU computation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 @ 48 MHz with DSP/MPU instructions and ART Accelerator for deterministic flash execution |
| RF Frequency Range | 150–960 MHz - covers global ISM bands (EU 863–870 MHz, US 902–928 MHz, CN 470–510 MHz) |
| LoRa® RX Sensitivity | –148 dBm at SF12/10.4 kHz - enables >15 km outdoor range in rural LoRaWAN® deployments |
| TX Output Power | Programmable up to +22 dBm - meets ETSI/FCC regulatory limits without external PA |
| Ultra-Low-Power Modes | Shutdown: 31 nA; Standby+RTC: 360 nA; Stop2+RTC: 1.07 µA - extends 10-year battery life in NB-IoT-class sensors |
| Security Features | AES-256 hardware accelerator, True RNG, PKA, 96-bit die ID, and PCROP-protected flash sectors |
| Analog Peripherals | 12-bit ADC @ 2.5 MSPS (16-bit oversampled), 12-bit DAC, 2x ultra-low-power comparators |
Pinout & Package
STM32WLE5CBU6 uses a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per ST's DS13105 Rev 12, Section 4 (Pinouts and Alternate Functions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_RF / VDD_PA | RF power supply | Dedicated 1.8–3.6 V supply for RF transceiver and power amplifier; decoupling critical for EMI compliance |
| ANT / RF_IO | RF antenna interface | Differential RF I/O port requiring external matching network or IPD (e.g., ST's ESDALC6-1BM2 for 868 MHz) |
| OSC_IN / OSC_OUT | 32 MHz crystal oscillator input/output | Drives high-frequency system clock; supports TCXO for LoRa® timing stability ±0.5 ppm |
| LSE_IN / LSE_OUT | 32.768 kHz RTC oscillator | Enables sub-second RTC wakeup and LoRa® beacon timing accuracy in low-power sleep states |
| BOOT0 | Boot mode selection | Pulled low for main flash boot; used with NRST for system memory bootloader entry via USART/SPI |
| NRST | Active-low reset | Asynchronous reset input with internal pull-up; supports external watchdog or power-on reset assertion |
Key Features
| Feature | Design Value |
|---|---|
| Multiprotocol Radio Subsystem | Fully integrated LoRa®, (G)FSK, (G)MSK, BPSK modem - eliminates need for external transceiver IC in LPWAN gateways and nodes |
| Embedded SMPS + Smart LDO Switch | On-chip buck converter reduces external BOM count; automatic LDO fallback ensures stable VDD during load transients |
| Hardware Security Engine | AES-256 + PKA + TRNG + UID - enables FIPS-compliant key generation, OTA firmware signing, and secure device onboarding |
| OTA Firmware Update Support | Bootloader with dual-bank flash and CRC validation - allows field updates without physical access or downtime |
| 5-V-Tolerant GPIOs (up to 43) | Interfacing with legacy 5 V peripherals (e.g., RS-485 transceivers, industrial sensors) without level shifters |
Applications
| Smart Utility Metering | Asset Tracking |
|---|---|
|
Use Scenario: Battery-powered gas/water meters transmitting hourly consumption data over LoRaWAN® to municipal gateways. IC Role / Device Role / Timing Role: Primary system-on-chip handling sensor acquisition (ADC), LoRa® packet assembly, secure OTA updates, and RTC-based scheduled transmissions. Use Value: 10+ year battery life enabled by 31 nA shutdown mode and adaptive TX power control based on RSSI feedback. |
Use Scenario: GPS-enabled cargo trackers reporting location every 6 hours using Sigfox™ or private (G)FSK networks. IC Role / Device Role / Timing Role: Dual-role controller: manages GNSS module UART interface and executes low-duty-cycle RF transmission bursts with precise timing alignment. Use Value: Integrated RF eliminates external transceiver, reducing PCB area by 35% and bill-of-materials cost by $1.20/unit at scale. |
| Environmental Sensor Networks | Industrial Predictive Maintenance |
|
Use Scenario: Soil moisture, temperature, and CO₂ sensors deployed in agricultural fields, communicating via W-MBus or proprietary LoRa® mesh. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating analog inputs (12-bit ADC), performing local threshold detection, and initiating encrypted RF alerts only on event triggers. Use Value: Ultra-low-power timers (LPTIM) enable microsecond-accurate wakeups for periodic sampling while maintaining sub-µA average current draw. |
Use Scenario: Vibration and temperature monitors on rotating machinery, transmitting spectral analysis results via private (G)MSK links to edge controllers. IC Role / Device Role / Timing Role: Real-time signal processor executing FFT on ADC samples, then packaging results into compact RF payloads with hardware CRC and AES encryption. Use Value: ART Accelerator ensures deterministic 48 MHz execution of time-critical FFT routines without flash wait states, reducing latency by 22% vs. cache-disabled operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LPWAN SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SX1262IMLTRT | Standalone LoRa® transceiver (no MCU); requires external host processor and flash memory | Lacks integrated Cortex-M4, security accelerators, and power management - suitable only when RF-only function is needed | Select when existing host MCU handles application logic and only RF extension is required; adds 3+ external components vs. STM32WLE5CBU6's SoC integration |
| RA4W1F20GNFP | Arm Cortex-M4 MCU with BLE 5.0 only; no sub-GHz radio or LoRa® support | Designed for short-range wireless (≤100 m); incompatible with wide-area LPWAN infrastructure | Choose only for Bluetooth mesh sensor networks where gateway proximity is guaranteed and LoRaWAN®/Sigfox™ coverage is unavailable |
Compared with SX1262IMLTRT and RA4W1F20GNFP, the STM32WLE5CBU6 uniquely combines long-range sub-GHz radio, secure MCU execution, and ultra-low-power system architecture - eliminating design trade-offs between RF capability, processing autonomy, and battery lifetime in remote IoT deployments.
Availability
STM32WLE5CBU6 is available at Aetrix Electronics and suitable for smart utility metering, asset tracking, environmental sensing, and industrial predictive maintenance requiring stable component supply and full production lifecycle support.
Supply support for STM32WLE5CBU6 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, Switzerland, delivering automotive, industrial, and IoT-focused silicon solutions since 1987.
The STM32WLE5 series belongs to ST's LPWAN-optimized MCU product line, engineered specifically for battery-operated, globally deployable IoT endpoints requiring regulatory-compliant sub-GHz connectivity and hardware-rooted security.
FAQ
What RF certifications does the STM32WLE5CBU6 support out-of-the-box?
The STM32WLE5CBU6 complies with ETSI EN 300 220 (Europe), FCC CFR 47 Parts 15/24/90 (USA), and ARIB STD-T30/T-67/T-108 (Japan) when used with ST-recommended IPDs and reference layout guidelines. Pre-certified module variants (e.g., STM32WLE5JC with certified antenna) are available for accelerated regulatory approval.
Does the STM32WLE5CBU6 support Over-the-Air (OTA) firmware updates?
Yes - it includes a factory-programmed ROM bootloader supporting UART and SPI interfaces, dual-bank flash memory for atomic updates, and hardware CRC/AES engines to verify and decrypt OTA payloads. ST's STM32CubeWL firmware package provides production-ready OTA middleware compliant with LoRaWAN® Class C and proprietary protocols.
How does the integrated SMPS improve system efficiency compared to external DC-DC converters?
The embedded SMPS achieves >90% efficiency across 1–100 mA loads and eliminates external inductor/capacitor components, reducing solution size by 25 mm² and improving EMI robustness. Its tight regulation (±2%) and fast transient response (<10 µs) prevent brownout during high-current LoRa® TX bursts, unlike discrete buck converters requiring additional compensation circuitry.
Can the STM32WLE5CBU6 operate in both LoRa® and (G)FSK modes simultaneously?
No - the radio subsystem operates in one modulation mode at a time, selected at initialization via the radio driver API. However, mode switching is software-controlled and takes <100 µs, enabling dynamic protocol adaptation (e.g., LoRa® for long-range uplink, (G)FSK for high-throughput downlink) within a single firmware image without hardware reconfiguration.
STM32WLE5CBU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 48-UFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- General ISM < 1GHz
- Protocol:
- LoRa, LoRaWAN 1.0, Sigfox
- Modulation:
- BPSK, FSK, GFSK, GMSK, MSK
- Frequency:
- 150MHz ~ 960MHz
- Data Rate (Max):
- 300kbps
- Power - Output:
- 22dBm
- Sensitivity:
- -148dBm
- Memory Size:
- 128kB Flash
- Serial Interfaces:
- ADC, GPIO, I2C, I2S, IrDA, JTAG, PWM, SPI, UART, USART
- GPIO:
- 29
- Voltage - Supply:
- 1.8V ~ 3.6V
- Current - Receiving:
- 4.82mA
- Current - Transmitting:
- 21mA ~ 120mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-UFQFPN (7x7)
STM32WLE5CBU6 FAQ
1.How can I place an order for STM32WLE5CBU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WLE5CBU6 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 STM32WLE5CBU6 reliable?
The price and inventory of STM32WLE5CBU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WLE5CBU6 is usually 5 days.
3.What payment methods are accepted for STM32WLE5CBU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WLE5CBU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WLE5CBU6?
STM32WLE5CBU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WLE5CBU6 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 STM32WLE5CBU6?
For technical support, including STM32WLE5CBU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WLE5CBU6 requirements.
6.How does Aetrix verify that STM32WLE5CBU6 is sourced from the original manufacturer or authorized distributors?
All STM32WLE5CBU6 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 STM32WLE5CBU6 meets industry standards.
7.What is the process for return or replacement of STM32WLE5CBU6?
All STM32WLE5CBU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32WLE5CBU6, 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 STM32WLE5CBU6 part is unused and in its original packaging.
Return procedure for STM32WLE5CBU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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