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STMicroelectronics STM32F071CBY6TR
- Part No.:
- STM32F071CBY6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 49-UFBGA, WLCSP
- Datasheet:
-
STM32F071CBY6TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 49WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,166
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Product details
Overview
STM32F071CBY6TR from STMicroelectronics is an Arm® Cortex®-M0 32-bit microcontroller with 128 KB Flash, 16 KB SRAM (with hardware parity), and operating voltage range of 2.0–3.6 V. It integrates a 12-bit ADC (1.0 µs conversion), dual-channel 12-bit DAC, seven timers including one advanced-control timer for six-channel PWM, and communication interfaces including 4 USARTs, 2 I²C, 2 SPI/I²S, HDMI CEC, and USB-less SWD debug. It is used in industrial sensor nodes requiring low-power operation, precise analog measurement, and multi-protocol connectivity.
For engineers reviewing the STM32F071CBY6TR datasheet, STM32F071CBY6TR pinout, STM32F071CBY6TR application, or STM32F071CBY6TR equivalent, key selection criteria include its 48 MHz max CPU frequency, 5V-tolerant I/O capability on up to 68 pins, RTC with calendar and alarm, capacitive touch sensing support (24 channels), and ECOPACK®2-compliant UFBGA49 package.
Technical Context
The device implements a single-cycle Arm Cortex-M0 core with Thumb-2 instruction set, supporting deterministic real-time execution at up to 48 MHz. Its clock system includes multiple internal oscillators (HSI48 with auto-trimming, HSI8, LSI, LSE) and external crystal support (4–32 MHz HSE, 32.768 kHz LSE), enabling flexible low-power and high-accuracy timing configurations.
Power architecture features independent VDD/VDDA domains, programmable voltage detector (PVD), POR/PDR, and three low-power modes (Sleep, Stop, Standby) with RTC and backup register retention powered by VBAT. The 12-bit ADC operates across 0–3.6 V input range with separate analog supply (2.4–3.6 V), while the dual 12-bit DAC supports buffered/unbuffered outputs with noise shaping capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0, 48 MHz max - enables deterministic real-time control with <100 ns interrupt latency. |
| Flash Memory | 128 KB - sufficient for complex firmware with bootloader, OTA update partition, and safety-critical code duplication. |
| SRAM | 16 KB with hardware parity - supports ECC-protected data buffers and stack integrity in industrial environments. |
| ADC | 12-bit, 1.0 µs conversion, 16-channel - delivers 1 MSPS sampling for motor current sensing or power metering. |
| DAC | Two 12-bit channels - enables simultaneous analog waveform generation (e.g., bias voltage + reference ramp) without external components. |
| I/O Voltage Tolerance | Up to 68 pins 5V-tolerant - simplifies interface with legacy 5V peripherals without level shifters. |
| Package | UFBGA49, 3.3 × 3.1 mm - enables compact PCB layout for space-constrained IoT edge devices. |
Pinout & Package
STM32F071CBY6TR is housed in a 49-ball ultra-fine-pitch ball grid array (UFBGA49) package with 0.4 mm pitch and 3.3 × 3.1 mm footprint. This RoHS-compliant, ECOPACK®2-qualified package supports automated assembly and offers thermal performance suitable for industrial ambient temperatures (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Digital power supply | Primary 2.0–3.6 V supply for core and digital peripherals; requires local 100 nF decoupling. |
| VDDA | Analog power supply | Independent 2.4–3.6 V supply for ADC/DAC/compensators; must be filtered separately from VDD. |
| PA0–PA15 | General-purpose I/O port A | Configurable as GPIO, alternate functions (USART2_TX, TIM2_CH1, etc.), or capacitive touch inputs. |
| PB0–PB15 | General-purpose I/O port B | Supports 5V-tolerant operation on PB0–PB13; usable for I²C, SPI, or external interrupt sources. |
| PC13–PC15 | Low-speed oscillator pins | Connect 32.768 kHz crystal for RTC calibration and low-power wake-up timing. |
| NRST | Active-low reset input | Asynchronous reset with Schmitt trigger; accepts 1.65–3.6 V logic levels and supports external reset button or supervisor IC. |
| SWDIO/SWCLK | Serial Wire Debug interface | Two-pin debug interface replacing JTAG; enables full flash programming and real-time trace without dedicated debug header. |
Key Features
| Feature | Design Value |
|---|---|
| HSI48 oscillator with auto-trimming | Enables USB-free device enumeration and precise timing without external crystal-reduces BOM cost and board area. |
| Capacitive touch sensing controller (TSC) | Supports 24 channels for self-capacitance measurement-enables robust touchkey, slider, and rotary encoder UIs with built-in noise immunity. |
| Programmable voltage detector (PVD) | Configurable threshold detection (2.0–2.9 V in steps) triggers interrupt or reset-prevents erratic behavior during brown-out conditions. |
| Advanced-control timer (TIM1) | 6-channel complementary PWM with dead-time insertion and fault protection-ideal for 3-phase motor gate drive without external logic. |
| Fast-mode Plus I²C (1 Mbit/s) | 20 mA sink capability on SDA/SCL-drives longer bus traces and higher capacitance loads without external pull-ups. |
Applications
| Industrial Sensor Node | Smart HVAC Controller |
|---|---|
Use Scenario: Compact environmental monitoring unit measuring temperature, humidity, and CO₂ using analog and digital sensors. IC Role / Device Role / Timing Role: Central MCU managing sensor acquisition (ADC/DAC), wireless transmission (USART + external transceiver), and RTC-based scheduled reporting. Use Value: Integrated 12-bit ADC and dual DAC eliminate external signal conditioning ICs; 5V-tolerant I/O simplifies connection to legacy HVAC actuators. | Use Scenario: Wall-mounted thermostat with capacitive touch interface, fan speed control, and occupancy sensing. IC Role / Device Role / Timing Role: Main controller executing PID loop, driving triac-based fan stages via TIM1 PWM, and detecting touch gestures via TSC. Use Value: On-chip TSC reduces component count vs. dedicated touch IC; advanced timer with dead-time prevents shoot-through in AC phase control. |
| Energy Metering Module | Programmable Logic Controller (PLC) I/O Expander |
Use Scenario: DIN-rail mounted sub-meter measuring voltage, current, and power factor in commercial buildings. IC Role / Device Role / Timing Role: Signal processor acquiring isolated analog inputs (via external amplifiers), computing RMS values, and communicating via RS-485 (USART+transceiver). Use Value: Hardware CRC unit accelerates checksum calculation for Modbus RTU; 16 KB SRAM with parity ensures data integrity during transient faults. | Use Scenario: Remote I/O module converting fieldbus signals (e.g., Profibus DP slave) into digital status/control over backplane. IC Role / Device Role / Timing Role: Protocol handler interfacing with FPGA or ASIC via parallel GPIO, managing watchdog supervision and diagnostics. Use Value: 87 fast I/Os with remappable EXTI allow flexible pin assignment for diverse fieldbus timing requirements; Stop mode enables <1 µA standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F072CBY6TR | Includes USB 2.0 FS device interface; identical Flash/SRAM/peripherals otherwise. | Required where host-side USB enumeration or CDC virtual COM port is needed. | Select when USB connectivity is mandatory; otherwise STM32F071CBY6TR offers lower cost and same analog/motor control capability. |
| STM32F091CBU6 | 128 KB Flash, 32 KB SRAM, adds CAN 2.0B controller and additional USART. | Suitable for automotive body electronics or industrial networks requiring CAN bus integration. | Choose if CAN protocol support is essential; STM32F071CBY6TR lacks CAN but provides superior capacitive touch channel count (24 vs. 18). |
Compared with STM32F072CBY6TR, the STM32F071CBY6TR trades USB for lower system cost and reduced EMI sensitivity; versus STM32F091CBU6, it offers higher touch channel density and smaller footprint at the expense of CAN and extra SRAM-making it optimal for cost-sensitive, touch-centric industrial edge nodes.
Availability
STM32F071CBY6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, energy metering modules, and PLC I/O expanders requiring stable component supply, long-term lifecycle assurance, and ECOPACK®2 compliance.
Supply support for STM32F071CBY6TR 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 sensors, and automotive-grade components since 1987.
The STM32F0 series targets cost-sensitive, resource-constrained embedded applications requiring robust analog integration, low-power operation, and industrial-grade reliability-optimized for appliances, building automation, and industrial controls.
FAQ
What is the maximum operating frequency and how is it achieved?
The STM32F071CBY6TR achieves a maximum CPU frequency of 48 MHz using its internal HSI48 oscillator with automatic trimming based on external synchronization, or via PLL multiplication of the HSE (4–32 MHz) or HSI8 (8 MHz) sources. No external crystal is required for full-speed operation, reducing BOM cost and board space.
Does this MCU support hardware CRC and why does it matter?
Yes, it includes a dedicated cyclic redundancy check (CRC) calculation unit compliant with IEEE-802.3. This enables real-time CRC-32 computation on data buffers or firmware images without CPU intervention-critical for secure OTA updates, Modbus RTU communication, and flash memory integrity verification in industrial systems.
How many I/O pins are 5V tolerant and what is their design impact?
Up to 68 I/O pins are 5V tolerant, covering all pins except those dedicated to analog functions (VREF+, VREF–, VBAT, VDDA, VSSA) and SWD debug lines. This eliminates level-shifting circuitry when interfacing with legacy 5V sensors, actuators, or logic, simplifying schematic design and improving system reliability under mixed-voltage conditions.
What low-power modes are supported and what is the lowest achievable current?
The MCU supports Sleep, Stop, and Standby modes. In Stop mode with RTC and SRAM retention enabled, typical current consumption is 0.34 µA at 25°C (VDD = 3.3 V). Standby mode drops to 0.22 µA with VBAT-powered RTC active-enabling multi-year battery life in wireless sensor endpoints without external power management ICs.
STM32F071CBY6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 49-UFBGA, WLCSP
- Series:
- STM32F0
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- HDMI-CEC, I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 37
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.65V ~ 3.6V
- Data Converters:
- A/D 13x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F071CBY6TR FAQ
1.How can I place an order for STM32F071CBY6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F071CBY6TR 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 STM32F071CBY6TR reliable?
The price and inventory of STM32F071CBY6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F071CBY6TR is usually 5 days.
3.What payment methods are accepted for STM32F071CBY6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F071CBY6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F071CBY6TR?
STM32F071CBY6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F071CBY6TR 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 STM32F071CBY6TR?
For technical support, including STM32F071CBY6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F071CBY6TR requirements.
6.How does Aetrix verify that STM32F071CBY6TR is sourced from the original manufacturer or authorized distributors?
All STM32F071CBY6TR 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 STM32F071CBY6TR meets industry standards.
7.What is the process for return or replacement of STM32F071CBY6TR?
All STM32F071CBY6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F071CBY6TR, 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 STM32F071CBY6TR part is unused and in its original packaging.
Return procedure for STM32F071CBY6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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