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STMicroelectronics STM32WLE5C8U6
- Part No.:
- STM32WLE5C8U6
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32WLE5C8U6.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,510
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Product details
Overview
STM32WLE5C8U6 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 across 150–960 MHz, achieves –148 dBm LoRa® RX sensitivity (SF12, 10.4 kHz), supports +22 dBm TX output, and targets battery-powered IoT end-nodes in smart metering, asset tracking, and environmental monitoring.
For engineers reviewing the STM32WLE5C8U6 datasheet, STM32WLE5C8U6 pinout, STM32WLE5C8U6 application, or STM32WLE5C8U6 equivalent, key selection criteria include sub-GHz RF performance compliance (ETSI EN 300 220, FCC Part 15), ultra-low-power operation (31 nA shutdown, 1.07 µA Stop2), integrated SMPS, and dual-mode security (AES-256 + PKA).
Technical Context
The STM32WLE5C8U6 integrates a single-core Arm Cortex-M4 CPU with ART Accelerator for zero-wait-state execution at up to 48 MHz, coupled with a fully integrated sub-GHz transceiver supporting LoRaWAN®, Sigfox™, and W-MBus protocols. Its RF subsystem includes programmable TX power (up to +22 dBm), adaptive RX sensitivity, and RF-PLL with fractional-N synthesis.
Power management combines an embedded SMPS step-down converter, smart SMPS-to-LDO switching, and five low-power modes - including Shutdown (31 nA), Standby+RTC (360 nA), and Stop2+RTC (1.07 µA) - all validated across –40 °C to +105 °C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 @ 48 MHz with DSP instructions and MPU - enables real-time signal processing for LPWAN protocol stacks. |
| RF Frequency Range | 150–960 MHz - covers global ISM bands (EU 863–870 MHz, US 902–928 MHz, CN 470–510 MHz) without external synthesizer. |
| LoRa® RX Sensitivity | –148 dBm @ SF12, 10.4 kHz - extends link budget by >10 dB vs. legacy FSK, enabling multi-kilometer rural coverage. |
| TX Output Power | Programmable up to +22 dBm - meets ETSI/FCC regulatory limits while supporting long-range node-to-gateway links. |
| Ultra-Low-Power Mode | Stop2 + RTC: 1.07 µA @ 3 V - allows decade-scale battery life in periodic wake-up sensor applications. |
| Security Acceleration | AES-256 + PKA + TRNG - enables secure OTA firmware updates and device authentication without software overhead. |
| Memory | 256 KB flash / 64 KB SRAM - sufficient for dual-band protocol stacks (e.g., LoRaWAN + BLE proxy) and local data buffering. |
Pinout & Package
UFQFPN48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant ECOPACK2, with 43 general-purpose I/Os (most 5 V-tolerant) and dedicated RF I/O pins (ANT, RFIO, VDDRF, VSSRF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Supports 1.8–3.6 V operation; decoupling required per datasheet layout guidelines for RF stability. |
| ANT, RFIO | RF antenna interface | Differential RF port requiring external matching network or ST IPD (e.g., SMPS-IPD-915 for 915 MHz). |
| OSC_IN, OSC_OUT | 32 MHz crystal oscillator input/output | Drives high-speed system clock; TCXO support enabled via programmable supply voltage on OSC_OUT. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with open-drain reset supervisors. |
| BOOT0 | Boot mode selection | High at power-up selects system memory bootloader; used for UART/SPI-based firmware recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Sub-GHz Transceiver | Single-die LoRa®/(G)FSK/(G)MSK/BPSK radio eliminates external RF IC, reducing BOM count and PCB area by >30%. |
| Embedded SMPS Converter | Replaces external DC/DC, achieving >85% efficiency at 10–100 mA loads and simplifying power design for coin-cell or energy-harvesting sources. |
| Hardware PKA Accelerator | Reduces ECC signature generation time by 10× vs. software-only, enabling fast secure join procedures in LoRaWAN Class C devices. |
| OTA Firmware Update Support | Bootloader with dual-bank flash and CRC validation ensures robust field upgrades without bricking during power loss. |
| 5 V-Tolerant GPIOs | 43 I/Os tolerate 5 V inputs - simplifies interfacing with legacy sensors, displays, and industrial logic without level shifters. |
Applications
| Smart Utility Metering | Industrial Asset Tracking |
|---|---|
|
Use Scenario: Battery-powered gas/water meters transmitting consumption data every 15 minutes over 5 km rural distance. IC Role / Device Role / Timing Role: System-on-chip MCU + transceiver handling LoRaWAN stack, ADC sampling, RTC timestamping, and secure payload encryption. Use Value: –148 dBm LoRa® sensitivity and +22 dBm TX enable reliable reception at gateway despite deep indoor meter placement and metal enclosure attenuation. |
Use Scenario: Ruggedized GPS tracker on shipping containers reporting location every 6 hours using solar charging. IC Role / Device Role / Timing Role: Low-power host controller managing GNSS module, accelerometer wake-up, RF transmission, and energy harvesting PMIC coordination. Use Value: 1.07 µA Stop2+RTC mode extends runtime between charges; integrated SMPS maintains >80% efficiency across 2.2–3.6 V input range. |
| Environmental Sensor Network | Smart Agriculture Node |
|
Use Scenario: Soil moisture, temperature, and CO₂ sensor deployed in remote vineyards with 10-year battery life target. IC Role / Device Role / Timing Role: Data acquisition hub performing oversampled 12-bit ADC conversions, local filtering, and scheduled LoRa® uplinks. Use Value: Hardware oversampling (up to 16-bit effective resolution) improves measurement fidelity without increasing MCU load or latency. |
Use Scenario: Wireless node monitoring irrigation valves, ambient humidity, and leaf wetness in precision orchards. IC Role / Device Role / Timing Role: Secure edge node executing local decision logic (e.g., valve actuation on threshold breach) and encrypted telemetry upload. Use Value: AES-256 + PKA + TRNG enables device identity attestation and encrypted command channel, preventing unauthorized control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LPWAN SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SX1262 + STM32L4 | Discrete RF + MCU solution; SX1262 lacks integrated MCU, requires external flash/SRAM and interconnect routing. | Higher BOM cost and PCB area; preferred when custom RF tuning or non-LoRa modulation dominates. | Select when RF parameter flexibility (e.g., custom IF filters) outweighs integration benefits. |
| STM32WL55JC | Same core and radio IP but UFBGA73 package (5 × 5 mm), higher pin count (73-ball), and dual-core (Cortex-M4 + Cortex-M0+) architecture. | Better suited for complex edge AI inference or concurrent protocol stacks (e.g., LoRaWAN + BLE mesh). | Select when additional peripherals (e.g., second ADC, extra timers) or dual-core task partitioning are required. |
Compared with SX1262+STM32L4, STM32WLE5C8U6 reduces component count and layout complexity; compared with STM32WL55JC, it trades pin count and dual-core capability for lower cost and smaller footprint in single-protocol deployments.
Availability
STM32WLE5C8U6 is available at Aetrix Electronics and suitable for smart utility metering, industrial asset tracking, and environmental sensor networks requiring stable component supply, long-term lifecycle assurance, and full regulatory compliance documentation.
Supply support for STM32WLE5C8U6 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, specializing in microcontrollers, power management, and analog/mixed-signal ICs for industrial, automotive, and IoT markets.
The STM32WLE5 series belongs to ST's LPWAN wireless MCU product line, designed specifically to unify sub-GHz connectivity and ultra-low-power processing in compact, certified, production-ready SoCs for global IoT deployments.
FAQ
What regulatory certifications does the STM32WLE5C8U6 hold?
The STM32WLE5C8U6 itself is not pre-certified; however, its integrated radio meets ETSI EN 300 220 (Europe), FCC CFR 47 Part 15 (USA), and ARIB STD-T67/T108 (Japan) requirements. Final device certification depends on board-level implementation, antenna design, and matching network - ST provides reference designs and test reports to accelerate regional approvals.
Does the STM32WLE5C8U6 support over-the-air (OTA) firmware updates?
Yes. The device includes a factory-programmed ROM bootloader supporting UART and SPI interfaces, plus dual-bank flash memory with hardware write protection. ST's STM32CubeWL firmware package provides verified OTA update libraries with CRC validation, rollback capability, and secure signature verification using the onboard PKA and AES accelerators.
How does the embedded SMPS improve system efficiency compared to LDO-only solutions?
The integrated SMPS delivers >85% efficiency across 10–100 mA loads and dynamically switches to LDO mode below 5 mA, eliminating external DC/DC components. This reduces quiescent current in low-power states and improves battery lifetime by up to 3× versus fixed LDO designs - especially critical in intermittent transmit applications like smart meters.
Can the STM32WLE5C8U6 operate in both LoRa® and (G)FSK modes simultaneously?
No. The radio subsystem operates in one modulation mode at a time - LoRa®, (G)FSK, (G)MSK, or BPSK - selected at runtime via register configuration. However, firmware can switch modes within milliseconds, enabling hybrid network participation (e.g., LoRaWAN uplink + FSK-based private downlink) without hardware change.
STM32WLE5C8U6 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:
- 802.15.4
- Protocol:
- LoRaWAN 1.0, Sigfox
- Modulation:
- BPSK, GFSK, GMSK, FSK, MSK
- Frequency:
- 150MHz ~ 960MHz
- Data Rate (Max):
- 300kbps
- Power - Output:
- 22dBm
- Sensitivity:
- -148dBm
- Memory Size:
- 64kB Flash
- Serial Interfaces:
- ADC, GPIO, I2C, SPI, IrDA, 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)
STM32WLE5C8U6 FAQ
1.How can I place an order for STM32WLE5C8U6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WLE5C8U6 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 STM32WLE5C8U6 reliable?
The price and inventory of STM32WLE5C8U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WLE5C8U6 is usually 5 days.
3.What payment methods are accepted for STM32WLE5C8U6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WLE5C8U6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WLE5C8U6?
STM32WLE5C8U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WLE5C8U6 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 STM32WLE5C8U6?
For technical support, including STM32WLE5C8U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WLE5C8U6 requirements.
6.How does Aetrix verify that STM32WLE5C8U6 is sourced from the original manufacturer or authorized distributors?
All STM32WLE5C8U6 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 STM32WLE5C8U6 meets industry standards.
7.What is the process for return or replacement of STM32WLE5C8U6?
All STM32WLE5C8U6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32WLE5C8U6, 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 STM32WLE5C8U6 part is unused and in its original packaging.
Return procedure for STM32WLE5C8U6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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