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STMicroelectronics STM32C071CBT6
- Part No.:
- STM32C071CBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
STM32C071CBT6.pdf
- Description:
- MAINSTREAM ARM CORTEX-M0+ MCU WI
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Inventory:4,780
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Product details
Overview
STM32C071CBT6 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, smart metering front-ends, and USB-connected embedded control systems.
For engineers reviewing the STM32C071CBT6 datasheet, STM32C071CBT6 pinout, STM32C071CBT6 application, or STM32C071CBT6 equivalent, key selection considerations include its 48 MHz max CPU frequency, 5 V-tolerant I/Os, crystal-less USB FS capability, -40°C to 125°C extended temperature grade, and LQFP48 package with 37 GPIOs.
Technical Context
The STM32C071CBT6 integrates an Arm Cortex-M0+ core with Memory Protection Unit (MPU), enabling secure partitioning of code and data regions for real-time deterministic execution. It supports boot from system memory, main flash, or SRAM, and includes a CRC calculation unit for firmware integrity verification.
Its clock system combines four oscillators: 4–48 MHz HSE, 32 kHz LSE with calibration, 48 MHz HSI48 (±1 %) with clock recovery for USB, and 32 kHz LSI (±5 %). Power management delivers five low-power modes (Sleep, Stop, Standby, Shutdown, and Low-power Run) with wake-up from all via GPIO, RTC alarm, or USART event.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz max - enables real-time control loops with <20 ns instruction cycle at full speed. |
| Flash / RAM | 128 KB flash with securable area + 24 KB SRAM with hardware parity - supports certified firmware updates and fault-tolerant data logging. |
| ADC | 12-bit, 0.4 µs conversion time, 19-channel input - captures fast transients in motor current sensing or power quality monitoring. |
| USB Interface | USB 2.0 Full-Speed device (crystal-less) - eliminates external 48 MHz crystal, reducing BOM cost and PCB footprint. |
| I/O Voltage | 5 V-tolerant on all 37 GPIOs - simplifies level-shifting in mixed-voltage industrial I/O subsystems. |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive body electronics and high-ambient industrial PLC modules. |
| DMA Channels | 5-channel controller with flexible peripheral mapping - enables zero-CPU-overhead data transfers between ADC, USART, and memory. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch), ECOPACK2-compliant, with exposed thermal pad. Pin count: 48 pins (including 37 GPIOs, 5 VDD/VSS, NRST, BOOT0, VREF+, VREF-, VBAT, USB D+/D-).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Power supply inputs | Separate analog/digital/IO rails enable noise isolation for precision ADC operation. |
| VSS, VSSA, VSSIO2 | Ground returns | Dedicated analog ground minimizes coupling into 12-bit ADC reference path. |
| PA9/PA10 (USART1_TX/RX) | Primary UART interface | Supports auto baud rate detection and wake-up from Stop mode - ideal for low-power remote telemetry. |
| PA11/PA12 (USB_DM/DP) | USB Full-Speed differential pair | Crystal-less operation uses internal HSI48 with clock recovery - no external oscillator required. |
| NRST | Active-low reset input | Accepts 1.65–3.6 V logic; internal pull-up ensures robust reset during brownout or ESD events. |
| BOOT0 | Boot mode selection | High at power-on selects system memory boot - enables field firmware recovery via USART. |
Key Features
| Feature | Design Value |
|---|---|
| Memory Protection Unit (MPU) | Enables secure task isolation in RTOS environments without external MMU hardware. |
| Crystal-less USB FS | Reduces bill-of-materials by eliminating 48 MHz crystal and load capacitors - validated across temperature and voltage. |
| 5 V-tolerant GPIOs | Eliminates level translators when interfacing with legacy 5 V peripherals (e.g., RS-485 transceivers, optocouplers). |
| Programmable BOR | Four threshold levels (2.0/2.2/2.4/2.7 V) allow precise reset behavior matching external regulator dropout specs. |
| Calendar RTC with alarm | Retains time/date in Standby mode using VBAT; alarm wakes CPU without full power-up - extends battery life in metering. |
Applications
| Industrial Sensor Node | Smart Electricity Meter Front-End |
|---|---|
Use Scenario: Compact, battery-backed environmental sensor hub collecting temperature, humidity, and CO₂ via I²C sensors and transmitting data over UART-to-LoRaWAN gateway. IC Role / Device Role / Timing Role: Main controller executing sensor polling, data preprocessing, and low-power scheduling; RTC provides timestamping and periodic wake-up. Use Value: Crystal-less USB enables firmware updates via portable diagnostic tool; 125°C rating allows deployment near HVAC ducts or electrical panels. |
Use Scenario: Isolated measurement front-end acquiring voltage/current waveforms via sigma-delta ADCs and communicating with metrology SoC via SPI. IC Role / Device Role / Timing Role: Peripheral manager handling isolation barrier communication, tamper detection I/O, and secure bootloader validation. Use Value: 5 V-tolerant GPIOs interface directly with anti-tamper switches and relay drivers; securable flash protects firmware integrity against unauthorized modification. |
| USB Human Interface Device (HID) | Automotive Body Control Module (BCM) Subnode |
Use Scenario: Programmable USB keypad or diagnostic button panel connecting directly to PC/laptop without external PHY. IC Role / Device Role / Timing Role: USB device endpoint with HID descriptor support; handles key scan matrix and debouncing in firmware. Use Value: Integrated crystal-less USB FS meets USB-IF compliance across -40°C to 85°C; 48 MHz CPU ensures sub-millisecond response latency. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting - powered from vehicle battery with load dump protection. IC Role / Device Role / Timing Role: Real-time actuator sequencer with PWM timers, CAN/LIN physical layer bridging, and watchdog supervision. Use Value: Extended -40°C to 125°C operation survives engine bay proximity; programmable BOR prevents erratic behavior during cranking voltage sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G071CBT6 | Same LQFP48 package, 128 KB flash, but Cortex-M0+ at 64 MHz; adds DMA burst mode and enhanced AES crypto. | Better suited for applications requiring higher compute throughput or cryptographic acceleration (e.g., secure OTA updates). | Select G071 if >48 MHz CPU performance or hardware AES is required; C071 offers lower dynamic power at same voltage. |
| STM32F071CBT6 | Legacy F0-series; identical pinout but lacks crystal-less USB, has only 16 KB SRAM, and no VBAT-powered RTC calendar. | Cannot replace C071 in USB-connected or long-term battery-backed RTC applications without redesign. | Choose F071 only for cost-sensitive legacy designs where USB and extended RTC are unnecessary. |
Compared with STM32G071CBT6, the C071 offers lower active power and simpler USB integration; versus STM32F071CBT6, it delivers modern USB, larger SRAM, and extended temperature support - making it optimal for new industrial and automotive edge nodes.
Availability
STM32C071CBT6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart electricity meter front-ends, and USB human interface devices requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for STM32C071CBT6 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 management ICs, MEMS, and automotive-grade components.
The STM32C0 series targets cost-sensitive, high-volume industrial and consumer applications demanding robustness, low power, and USB connectivity - with the C071 variant optimized for extended temperature operation and crystal-less USB integration.
FAQ
Does STM32C071CBT6 support USB device functionality without an external crystal?
Yes. The STM32C071CBT6 integrates a factory-calibrated 48 MHz HSI48 oscillator with clock recovery system, enabling full USB 2.0 Full-Speed device operation without any external crystal or oscillator. This is validated per USB-IF specifications across the full operating voltage (2.0–3.6 V) and temperature (-40°C to 125°C) range.
What is the maximum number of 5 V-tolerant GPIOs on this device?
All 37 general-purpose I/O pins on the STM32C071CBT6 are 5 V-tolerant when configured as inputs or outputs, regardless of VDDIO supply voltage (1.65–3.6 V). This is confirmed in Section 5.3.13 (I/O port characteristics) of DS14693 Rev 2, Table 51, and applies to all alternate functions including USART, SPI, and I²C.
How does the securable flash area function in practice?
Up to 16 KB of the 128 KB flash can be designated as securable - write-protected and inaccessible to debug interfaces or software running outside privileged mode. This area stores cryptographic keys, secure boot code, or calibration data, enforced by the Flash Memory Interface (FMIF) and Readout Protection Level 2 (RDP2) configuration.
Is the RTC calendar functional in Standby mode with VBAT supplied?
Yes. When VBAT is connected and enabled, the calendar RTC retains date/time, alarm settings, and wake-up capability in Standby mode. The backup domain remains powered, and the RTC continues counting using the LSE (32.768 kHz) or LSI oscillator - verified in Section 3.16 and Table 33 (Standby current consumption includes RTC active).
STM32C071CBT6 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:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
STM32C071CBT6 FAQ
1.How can I place an order for STM32C071CBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32C071CBT6 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 STM32C071CBT6 reliable?
The price and inventory of STM32C071CBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32C071CBT6 is usually 5 days.
3.What payment methods are accepted for STM32C071CBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32C071CBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32C071CBT6?
STM32C071CBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32C071CBT6 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 STM32C071CBT6?
For technical support, including STM32C071CBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32C071CBT6 requirements.
6.How does Aetrix verify that STM32C071CBT6 is sourced from the original manufacturer or authorized distributors?
All STM32C071CBT6 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 STM32C071CBT6 meets industry standards.
7.What is the process for return or replacement of STM32C071CBT6?
All STM32C071CBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32C071CBT6, 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 STM32C071CBT6 part is unused and in its original packaging.
Return procedure for STM32C071CBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32C071CBT6 Tags
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