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STMicroelectronics STM32C071GBU6N
- Part No.:
- STM32C071GBU6N
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
STM32C071GBU6N.pdf
- Description:
- MAINSTREAM ARM CORTEX-M0+ MCU WI
- Quantity:
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Inventory:1,414
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Product details
Overview
STM32C071GBU6N from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller with 128 KB flash, 24 KB SRAM, USB Full-Speed device interface (crystal-less), dual USARTs supporting LIN/IrDA/ISO7816, and 12-bit ADC with up to 19 external channels - deployed in industrial sensor nodes requiring low-power USB connectivity and analog signal acquisition.
For engineers reviewing the STM32C071GBU6N datasheet, STM32C071GBU6N pinout, STM32C071GBU6N application, or STM32C071GBU6N equivalent, key selection criteria include USB FS crystal-less operation, 5 V-tolerant I/O count (up to 61), operating temperature range (–40°C to 125°C), and support for secure boot via securable flash area.
Technical Context
The STM32C071GBU6N integrates an Arm Cortex-M0+ core with MPU, running at up to 48 MHz, and features a dedicated USB 2.0 FS device controller with internal clock recovery (no external crystal required). Its memory subsystem includes 128 KB of flash with readout protection and securable area, plus 24 KB of SRAM with hardware parity checking.
Clock architecture supports multiple sources: 4–48 MHz HSE, 32 kHz LSE with calibration, 48 MHz HSI48 (±1 %), and 32 kHz LSI (±5 %). Power management enables four low-power modes (Sleep, Stop, Standby, Shutdown) with wake-up from Stop mode via I²C, USART, or RTC alarm.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 48 MHz max - enables deterministic real-time control with low gate count and energy efficiency. |
| Flash / RAM | 128 KB flash with securable area + 24 KB SRAM with parity - supports firmware updates and data integrity in safety-critical edge nodes. |
| USB Interface | USB 2.0 Full-Speed device (crystal-less) - eliminates external 48 MHz crystal, reducing BOM cost and PCB footprint. |
| ADC | 12-bit, 0.4 µs conversion time, up to 19 external channels - suitable for multi-sensor analog front-end sampling at ≥2.5 MSPS effective rate. |
| I/O Count & Tolerance | Up to 61 fast I/Os, all 5 V-tolerant - simplifies interface to legacy industrial logic and sensors without level shifters. |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive modules and high-ambient industrial PLC I/O cards. |
| Supply Range | 2.0 V to 3.6 V main supply; separate 1.65–3.6 V I/O supply - allows flexible power domain partitioning and battery-backed operation. |
Pinout & Package
STM32C071GBU6N uses the UFQFPN48 (7 × 7 mm) package with exposed thermal pad, ECOPACK2-compliant, and rated for industrial temperature range. Pin assignments follow ST's standard STM32C0 series layout with dedicated VDD/VSS pairs, NRST, BOOT0, and USB D+/D− on fixed pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Main, analog, and I/O supply rails | Independent regulation paths enable noise isolation between digital core, ADC, and mixed-signal peripherals. |
| VSS, VSSA, VSSIO2 | Digital, analog, and I/O ground returns | Separate ground planes reduce coupling between high-speed switching and precision analog circuits. |
| PA11/PA12 | USB DM/DP | Dedicated full-speed USB transceiver pins with internal pull-ups; no external crystal needed for device mode. |
| PA9/PA10 | USART1_TX/USART1_RX | Support LIN bus physical layer (ISO 17987) and IrDA modulation with auto baud-rate detection. |
| PA0–PA7, PB0–PB15, etc. | General-purpose I/O with alternate functions | All 61 pins support external interrupt, timer capture/compare, and 5 V tolerance - simplifies direct connection to industrial sensors and actuators. |
| NRST | Active-low reset input | Accepts 1.65–3.6 V logic; supports programmable brownout reset and POR/PDR for robust power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Crystal-less USB FS | Internal 48 MHz HSI48 with clock recovery system eliminates external crystal, saving 2 BOM items and >1 mm² PCB area. |
| Securable Flash Area | Configurable protected region prevents unauthorized read-out or overwrite of bootloader or cryptographic keys. |
| 5 V-Tolerant I/Os | All GPIOs withstand 5.5 V - enables direct interfacing with TTL/CMOS logic, RS-485 transceivers, and industrial PLC outputs. |
| Low-Power Stop Mode | Typical 0.32 µA (with RTC active) - extends battery life in wireless sensor transmitters with periodic wake-up events. |
| Advanced Timers | TIM1 with complementary outputs and dead-time insertion - supports 3-phase motor control without external gate drivers. |
Applications
| Industrial Sensor Hub | USB-C Powered Peripheral |
|---|---|
Use Scenario: Compact environmental monitoring node collecting temperature, humidity, and CO₂ via analog and I²C sensors, transmitting data over USB to host PC or gateway. IC Role / Device Role / Timing Role: Central MCU executing sensor fusion, USB HID/COM-class enumeration, and real-time clock-based logging. Use Value: Crystal-less USB FS reduces component count; 12-bit ADC with hardware oversampling improves resolution to 14 bits for precision analog sensing. | Use Scenario: Self-powered USB peripheral (e.g., smart dock, HID keyboard) drawing power directly from USB-C VBUS (5 V) and regulating down to 3.3 V. IC Role / Device Role / Timing Role: System controller managing VBUS detection, USB enumeration, and power-aware firmware execution. Use Value: 5 V-tolerant I/Os interface directly to USB-C CC logic and VBUS presence detection; low-power Stop mode extends standby duration. |
| Motor Control Edge Node | Secure Firmware Update Module |
Use Scenario: Brushless DC motor driver in HVAC blower or small pump, using hall-effect sensors and driving 3-phase inverter via PWM. IC Role / Device Role / Timing Role: Real-time motion controller with TIM1 advanced timer generating synchronized 6-channel PWM with fault protection. Use Value: Hardware dead-time insertion and complementary output enable safe gate driving; 48 MHz core ensures <1 µs loop latency for field-oriented control. | Use Scenario: Field-deployed IoT endpoint receiving encrypted firmware updates over UART or USB, verifying authenticity before flashing. IC Role / Device Role / Timing Role: Secure bootloader executing signature verification, flash write protection, and rollback prevention. Use Value: Securable flash area isolates bootloader; CRC unit accelerates hash computation; unique 96-bit ID enables device-specific key binding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G071GBU6 | Higher-performance Cortex-M0+, 64 MHz max; 128 KB flash, same 48-pin UFQFPN; adds AES-128 and true random number generator. | Better suited for applications requiring cryptographic acceleration or higher compute throughput (e.g., TLS stack offload). | Select when security co-processing or >48 MHz timing margin is required; otherwise STM32C071GBU6N offers lower cost and identical peripheral set. |
| STM32F071CBT6 | Legacy Cortex-M0, 48 MHz; 128 KB flash, 16 KB RAM; lacks USB FS, crystal-less operation, and securable flash area. | Limited to non-USB designs; no built-in security features; lower temp grade (–40°C to 85°C only). | Only consider for cost-sensitive, USB-free legacy upgrades where security and extended temperature are not required. |
Compared with STM32G071GBU6, the C071 offers identical USB, ADC, and I/O capabilities at lower price and power; versus STM32F071CBT6, it adds essential modern features - crystal-less USB, secure boot, and 125°C operation - without increasing footprint or complexity.
Availability
STM32C071GBU6N is available at Aetrix Electronics and suitable for industrial sensor hubs, USB-C powered peripherals, motor control edge nodes, and secure firmware update modules requiring stable component supply across long-lifecycle deployments.
Supply support for STM32C071GBU6N 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM32C0 series targets cost-sensitive, high-volume embedded applications needing USB connectivity, robust analog integration, and extended temperature operation - optimized for rapid time-to-market in industrial automation and smart peripherals.
FAQ
Does STM32C071GBU6N support USB host functionality?
No. The STM32C071GBU6N integrates only a USB 2.0 Full-Speed device controller - not a host or OTG controller. It can act as a USB peripheral (e.g., CDC ACM, HID, MSC) but cannot enumerate or control other USB devices. For host capability, consider STM32C071xB variants with USBH or higher-series MCUs like STM32G0B1.
What is the maximum allowed I/O voltage for STM32C071GBU6N?
The absolute maximum I/O voltage is 5.5 V, and all 61 GPIOs are 5 V-tolerant when configured as inputs or outputs. This applies across the full operating temperature range (–40°C to 125°C) and supply voltage (2.0–3.6 V), enabling direct interface to 5 V logic without external level shifters.
How does the crystal-less USB feature work technically?
The STM32C071GBU6N uses an internal 48 MHz HSI48 oscillator with a clock recovery system (CRS) that synchronizes to the USB SOF packet timing. This eliminates need for an external 48 MHz crystal while maintaining ±0.25 % accuracy required for USB FS device compliance - verified per USB-IF test specifications.
Is the securable flash area configurable in production units?
Yes. The securable flash area is defined by option bytes (RDP and SEC bits) programmed via SWD or bootloader. Once secured, read/write access to that region is blocked unless RDP level is lowered - which erases the entire flash. This enables one-time provisioning of bootloader or cryptographic keys in production lines.
STM32C071GBU6N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- -
- Core Size:
- -
- Speed:
- -
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- -
- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
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- Operating Temperature:
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- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
STM32C071GBU6N FAQ
1.How can I place an order for STM32C071GBU6N through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32C071GBU6N 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 STM32C071GBU6N reliable?
The price and inventory of STM32C071GBU6N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32C071GBU6N is usually 5 days.
3.What payment methods are accepted for STM32C071GBU6N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32C071GBU6N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32C071GBU6N?
STM32C071GBU6N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32C071GBU6N 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 STM32C071GBU6N?
For technical support, including STM32C071GBU6N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32C071GBU6N requirements.
6.How does Aetrix verify that STM32C071GBU6N is sourced from the original manufacturer or authorized distributors?
All STM32C071GBU6N 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 STM32C071GBU6N meets industry standards.
7.What is the process for return or replacement of STM32C071GBU6N?
All STM32C071GBU6N units undergo pre-shipment inspection (PSI). If there is an issue with STM32C071GBU6N, 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 STM32C071GBU6N part is unused and in its original packaging.
Return procedure for STM32C071GBU6N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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