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STMicroelectronics STM32F071CBU7TR
- Part No.:
- STM32F071CBU7TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32F071CBU7TR.pdf
- Description:
- IC MCU 32BIT 128KB FLSH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:4,846
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Product details
Overview
STM32F071CBU7TR from STMicroelectronics is a 32-bit Arm® Cortex®-M0 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 SWD debug. It is used in industrial sensor nodes requiring integrated analog peripherals and low-power operation.
For engineers reviewing the STM32F071CBU7TR datasheet, STM32F071CBU7TR pinout, STM32F071CBU7TR application, or STM32F071CBU7TR equivalent, key selection criteria include Flash/SRAM size, 5V-tolerant I/O count (up to 68), RTC with calibration, capacitive touch support (24 channels), and supply voltage flexibility (VDDIO2 down to 1.65 V).
Technical Context
The STM32F071CBU7TR implements an Arm Cortex-M0 core running at up to 48 MHz, supported by multiple clock sources: 4–32 MHz external crystal, 32 kHz RTC oscillator, internal 8 MHz RC with PLL, and factory-trimmed 48 MHz HSI48 oscillator synchronized via CRS. Its memory subsystem includes 128 KB Flash with error correction and 16 KB SRAM with hardware parity checking.
Power management includes programmable voltage detector (PVD), POR/PDR, and three low-power modes (Sleep, Stop, Standby) with RTC and backup register retention on VBAT. Analog subsystem comprises one 12-bit ADC (16-channel, 0–3.6 V range, separate VDDA supply), two 12-bit DAC channels, two fast comparators, and a dedicated touch-sensing controller (TSC) supporting up to 24 capacitive sensing channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0, 48 MHz max - enables real-time deterministic control with Thumb-2 instruction set and NVIC interrupt handling. |
| Flash Memory | 128 KB - sufficient for complex firmware with bootloader, OTA update partition, and safety-critical code duplication. |
| SRAM | 16 KB with HW parity - supports robust data buffering and runtime integrity checking for industrial applications. |
| ADC | 12-bit, 1.0 µs conversion, 16-channel - allows high-resolution sampling of multiple sensors (e.g., temperature, pressure, current) within tight timing windows. |
| DAC | Two 12-bit channels - enables simultaneous analog output generation for control loops (e.g., motor bias, reference voltage synthesis). |
| I/O Voltage Tolerance | Up to 68 pins 5V-tolerant - simplifies interface with legacy 5V peripherals without level shifters. |
| Capacitive Sensing | 24-channel TSC - supports multi-button touchpads or rotary encoders in HMI designs without external ICs. |
Pinout & Package
STM32F071CBU7TR uses the UFQFPN48 (7 × 7 mm) package with 48-pin quad flat no-lead construction, ECOPACK®2 compliant, suitable for space-constrained industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VSS, VSSA | Power and ground rails | Separate digital/analog supplies enable noise isolation; VDDA must be ≥2.4 V for full ADC/DAC accuracy. |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/O | All GPIOs support external interrupts and remappable alternate functions; up to 68 are 5V-tolerant. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1 | ADC input channels | 10 dedicated ADC inputs (plus 6 more via multiplexing) allow concurrent analog monitoring across system domains. |
| PA4, PA5 | DAC outputs | Direct connection to DAC1_OUT1/DAC1_OUT2; require external buffer for driving loads >10 kΩ. |
| PC13, PC14, PC15 | RTC oscillator pins | Support 32.768 kHz crystal for calendar RTC with ±20 ppm accuracy and automatic calibration. |
| PA13, PA14 | SWD debug interface | Enable non-intrusive programming and real-time debugging using standard ARM Serial Wire Debug protocol. |
Key Features
| Feature | Design Value |
|---|---|
| HSI48 oscillator with CRS | Factory-trimmed 48 MHz RC clock synchronized to USB or external reference - eliminates need for external crystal in USB-capable designs. |
| Programmable voltage detector (PVD) | Configurable threshold (2.2–2.9 V) with interrupt capability - enables early warning of brown-out before system reset. |
| Touch Sensing Controller (TSC) | Hardware-accelerated acquisition for 24 electrodes - reduces CPU load and enables <100 ms touch response time in battery-powered HMIs. |
| HDMI CEC interface | Dedicated CEC peripheral with header detection wakeup - supports remote control interoperability in smart home appliances without MCU polling. |
| Independent watchdog (IWDG) | LSI-based 40 kHz clock source with 12-bit downcounter - ensures fail-safe recovery even if main clock fails. |
Applications
| Industrial Sensor Node | Smart Appliance HMI |
|---|---|
Use Scenario: Compact environmental monitor collecting temperature, humidity, and CO₂ via analog and digital sensors, transmitting data over UART/RS-485. IC Role / Device Role / Timing Role: Main controller executing sensor fusion, local decision logic, and serial protocol stack; RTC provides timestamping and periodic wake-up from Stop mode. Use Value: Integrated 12-bit ADC + DAC + 68× 5V-tolerant I/O eliminates signal conditioning ICs and level shifters, reducing BOM count and board area. | Use Scenario: Touch-enabled oven control panel with rotary encoder emulation and LED dimming feedback. IC Role / Device Role / Timing Role: Dedicated HMI processor managing capacitive touch scanning, PWM-driven LED brightness control, and buzzer tone generation. Use Value: On-chip TSC and dual DAC enable direct electrode drive and analog feedback without external touch controller or audio DAC. |
| Energy Meter Front-End | PLC I/O Module |
Use Scenario: AC mains monitoring module measuring voltage/current harmonics and computing RMS/kWh using shunt-based sensing. IC Role / Device Role / Timing Role: Signal acquisition engine performing synchronized sampling via ADC trigger from TIM1, with real-time calculations offloaded to Cortex-M0 core. Use Value: 1.0 µs ADC conversion and hardware CRC unit ensure accurate, tamper-resistant metering data with minimal software overhead. | Use Scenario: DIN-rail mounted digital I/O expansion module converting 24 V DC field signals to isolated RS-485 Modbus RTU output. IC Role / Device Role / Timing Role: Protocol bridge and GPIO manager handling discrete input debouncing, output latching, and Modbus frame assembly via USART1/USART2. Use Value: Four USARTs with LIN/IRDA/ISO7816 support allow flexible fieldbus integration; VDDIO2 pins simplify interfacing to 24 V optocoupler logic levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F070CBT6 | 64 KB Flash, no DAC, no TSC, same pinout and peripherals otherwise | Lacks analog output and touch capability; suited for cost-sensitive digital control only | Select when DAC/TSC are unused and Flash requirement ≤64 KB |
| STM32F072CBT6 | Same Flash/SRAM, adds USB 2.0 FS device, removes HDMI CEC | Enables USB HID/class-compliant device functionality but loses CEC remote control support | Select when USB connectivity is required and CEC is unnecessary |
Compared with STM32F071CBU7TR, the F070CBT6 reduces analog capability and memory for lower cost, while the F072CBT6 trades CEC for USB - making the F071 optimal for mixed-signal HMI and industrial sensing where both DAC and touch are essential.
Availability
STM32F071CBU7TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance HMIs, energy meter front-ends, and PLC I/O modules requiring stable component supply, long-term lifecycle assurance, and ECOPACK®2 compliance.
Supply support for STM32F071CBU7TR 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 consumer markets.
The STM32F0 series targets cost-sensitive, resource-constrained embedded applications requiring high integration, low power, and robust analog peripherals - optimized for industrial control, HMI, and sensor edge nodes.
FAQ
What is the maximum operating frequency and how is it achieved?
The STM32F071CBU7TR achieves a maximum CPU frequency of 48 MHz using its internal 48 MHz HSI48 oscillator, which is factory-trimmed and automatically synchronized to an external clock source (e.g., USB SOF or external reference) via the Clock Recovery System (CRS). Alternatively, it can use an external 4–32 MHz crystal with PLL multiplication.
Does this MCU support hardware cryptographic acceleration?
No, the STM32F071CBU7TR does not include hardware cryptographic accelerators such as AES, SHA, or PKA engines. It relies on software libraries for cryptographic operations. For hardware crypto, consider STM32L4 or STM32G0 series devices with dedicated crypto peripherals.
What are the thermal limitations of the UFQFPN48 package?
The UFQFPN48 package has a maximum junction temperature of 125°C and a thermal resistance θJA of 47°C/W (typical, JEDEC-standard PCB layout). At ambient temperatures up to 85°C and full peripheral activation, derating is required above ~120 mA total VDD current to maintain safe junction temperature.
Can the internal 12-bit DAC drive a 500 Ω load directly?
No, the internal DAC outputs (PA4/PA5) are specified for loads ≥5 kΩ. Driving a 500 Ω load causes significant gain error and linearity degradation due to output impedance (~15 kΩ). An external rail-to-rail op-amp buffer is required for low-impedance loads.
STM32F071CBU7TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F071CBU7TR FAQ
1.How can I place an order for STM32F071CBU7TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F071CBU7TR 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 STM32F071CBU7TR reliable?
The price and inventory of STM32F071CBU7TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F071CBU7TR is usually 5 days.
3.What payment methods are accepted for STM32F071CBU7TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F071CBU7TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F071CBU7TR?
STM32F071CBU7TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F071CBU7TR 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 STM32F071CBU7TR?
For technical support, including STM32F071CBU7TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F071CBU7TR requirements.
6.How does Aetrix verify that STM32F071CBU7TR is sourced from the original manufacturer or authorized distributors?
All STM32F071CBU7TR 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 STM32F071CBU7TR meets industry standards.
7.What is the process for return or replacement of STM32F071CBU7TR?
All STM32F071CBU7TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F071CBU7TR, 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 STM32F071CBU7TR part is unused and in its original packaging.
Return procedure for STM32F071CBU7TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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