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STMicroelectronics STM32F071CBT7TR
- Part No.:
- STM32F071CBT7TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32F071CBT7TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,138
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Product details
Overview
STM32F071CBT7TR 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, 12 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 debug via SWD - deployed in industrial HMI, smart sensor nodes, and low-power metering systems.
For engineers reviewing the STM32F071CBT7TR datasheet, STM32F071CBT7TR pinout, STM32F071CBT7TR application, or STM32F071CBT7TR 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 wakeup from Stop/Standby, and integrated capacitive touch sensing (up to 24 channels) for touchkey and rotary control.
Technical Context
The device implements a single-cycle Cortex-M0 core with Thumb-2 instruction set, supporting deterministic real-time execution and low-latency interrupt handling (NVIC with 32 interrupts). 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 precise timing for RTC, USB-less synchronization, and dynamic power mode transitions.
Power architecture features three independent supply domains: digital (VDD), analog (VDDA), and optional I/O rail (VDDIO2), with programmable voltage detector (PVD), POR/PDR, and three low-power modes (Sleep, Stop, Standby) achieving sub-µA standby current with RTC and backup registers retained via VBAT.
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 |
| Memory | 128 KB Flash + 16 KB SRAM (HW parity) - supports secure firmware storage and robust data buffering |
| Analog Peripherals | 1× 12-bit ADC (16 ch, 1.0 µs), 2× 12-bit DAC, 2× comparators - enables closed-loop analog signal conditioning and waveform generation |
| Timers | 12 timers: TIM1 (advanced PWM), TIM2/3/14–17 (general-purpose), TIM6/7 (basic), IWDG/WWDG - supports motor control, IR decoding, and safety watchdog coverage |
| Communication | 4× USART (LIN/ISO7816/IrDA), 2× I²C (Fast Mode Plus), 2× SPI/I²S (18 Mbit/s), HDMI CEC - meets industrial serial, audio, and consumer control protocol requirements |
| I/O Capability | Up to 87 fast I/Os; 68 with 5V tolerance, 19 with independent VDDIO2 supply - simplifies mixed-voltage interface design without level shifters |
| Low-Power Performance | Stop mode: 0.34 µA typical; Standby with RTC: 0.8 µA - enables battery-powered operation for >5 years with coin-cell supply |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant ECOPACK®2, rated for industrial temperature range (–40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VSS, VSSA | Power and ground rails | Separate digital/analog supplies enable noise isolation for precision ADC/DAC operation |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PF0–PF1 | General-purpose I/O ports | All mappable to EXTI; up to 68 pins 5V-tolerant - supports direct connection to legacy 5V logic |
| NRST | Active-low reset input | Internal pull-up; accepts external reset pulse or debugger-initiated reset |
| BOOT0 | Boot mode selection | High at reset forces system memory boot (for DFU/ISP); controlled via external pull-down for normal Flash boot |
| SWDIO / SWCLK | Serial Wire Debug interface | 2-pin debug port replacing JTAG - reduces PCB footprint while retaining full flash programming and real-time trace |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive Touch Sensing (TSC) | 24-channel controller with built-in charge transfer, enabling touchkey, slider, and rotary encoder without external IC |
| Internal HSI48 Oscillator | 48 MHz RC oscillator with automatic trimming against external sync - eliminates crystal for USB-less HID and CEC timing |
| Programmable Voltage Detector (PVD) | Configurable threshold (2.2–2.9 V) with interrupt output - enables graceful firmware shutdown before brownout |
| RTC with Calendar & Wakeup | Full binary-coded decimal (BCD) calendar, alarm, and periodic wakeup from Stop/Standby - supports time-triggered scheduling in ultra-low-power mode |
| DMA Controller | 7-channel peripheral-to-memory/memory-to-peripheral DMA - offloads CPU during ADC sampling, UART transfers, and SPI bursts |
Applications
| Industrial HMI Panel | Smart Energy Meter |
|---|---|
Use Scenario: Local operator interface with touch buttons, LED indicators, and RS-485 communication for building automation. IC Role / Device Role / Timing Role: Main controller executing GUI logic, managing capacitive touch inputs, driving UART-to-RS485 transceivers, and maintaining real-time logging via RTC. Use Value: Integrated TSC eliminates external touch controller; 5V-tolerant I/O interfaces directly with legacy panel components; low-power Stop mode extends battery life during idle periods. | Use Scenario: Residential electricity meter with pulse counting, tamper detection, and infrared (IrDA) utility readout. IC Role / Device Role / Timing Role: System-on-chip managing metrology ADC sampling, IrDA physical layer, RTC-based billing intervals, and secure firmware updates over UART. Use Value: Dual 12-bit DAC generates calibration references; 4 USARTs support simultaneous IrDA, optical probe, and modem interfaces; VBAT-backed RTC ensures accurate billing timestamping across power outages. |
| White Goods Motor Control | IoT Sensor Node |
Use Scenario: Brushless DC (BLDC) motor driver in washing machine drum control with Hall sensor feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Real-time motor commutation engine using TIM1 advanced timer for synchronized 6-channel center-aligned PWM and ADC-triggered current sampling. Use Value: Hardware-accelerated PWM dead-time insertion and fault protection reduce MCU overhead; 12-bit ADC achieves ±1 LSB INL for precise current loop control. | Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and ambient light, transmitting data via UART-to-LoRaWAN gateway. IC Role / Device Role / Timing Role: Low-power host processor managing sensor I²C reads, ADC conversions, RTC-scheduled wakeups, and UART packet framing. Use Value: Sub-µA Standby current with RTC active enables multi-year operation on CR2032; integrated comparators monitor battery voltage for predictive replacement alerts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F070F6P6TR | 64 KB Flash, no DAC, no TSC, 48-pin LQFP - lower peripheral count and memory | Suitable for cost-sensitive, non-touch applications requiring only basic UART/SPI and GPIO | Select when DAC, touch sensing, or >64 KB code space are unnecessary |
| STM32F072CBT6 | Same package and Flash/RAM, but adds USB 2.0 FS device interface and CRC unit - no functional difference in analog/timer/peripheral count | Required where host-side USB connectivity (e.g., CDC virtual COM port) replaces UART or I²C for PC interfacing | Choose when USB device functionality is mandatory and board layout allows same footprint |
Compared with STM32F071CBT7TR, the F070F6P6TR sacrifices DAC, TSC, and 64 KB Flash for lower BOM cost, while the F072CBT6 adds USB at identical analog/timing capability - making the F071 optimal for touch-enabled, USB-free, precision analog edge nodes.
Availability
STM32F071CBT7TR is available at Aetrix Electronics and suitable for industrial HMI, smart energy metering, white goods motor control, and IoT sensor nodes requiring stable component supply across extended product lifecycles.
Supply support for STM32F071CBT7TR 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM32F0 series targets cost-sensitive, low-power embedded applications demanding high integration, robustness, and toolchain compatibility - optimized for rapid development of appliance controls, industrial I/O modules, and battery-operated endpoints.
FAQ
What is the maximum operating frequency and supported voltage range?
The STM32F071CBT7TR operates at up to 48 MHz CPU frequency with a supply voltage range of 2.0 V to 3.6 V for VDD and VDDA. The analog supply VDDA must be equal to or less than VDD, and selected I/Os support VDDIO2 from 1.65 V to 3.6 V - enabling flexible mixed-signal interfacing while maintaining ADC/DAC accuracy across the full voltage range.
Does this MCU support hardware-accelerated capacitive touch sensing?
Yes, it integrates a dedicated Touch Sensing Controller (TSC) supporting up to 24 capacitive sensing channels. This includes built-in charge transfer, spread spectrum, and acquisition timing control - allowing implementation of touchkeys, linear sliders, and rotary encoders without external components or additional MCU processing overhead.
What debug interface does the STM32F071CBT7TR use, and is JTAG available?
The device uses Serial Wire Debug (SWD) with two pins: SWDIO and SWCLK. JTAG is not implemented; SWD provides full debug, programming, and real-time trace capability at reduced pin count. SWD is supported by all major IDEs (STM32CubeIDE, Keil MDK, IAR EWARM) and ST-LINK debug probes.
How many 5V-tolerant I/O pins does the LQFP48 variant have?
The STM32F071CBT7TR in LQFP48 exposes 38 I/O pins (PA0–PA15, PB0–PB15, PC13–PC15, PF0–PF1), of which 32 are 5V-tolerant. This includes all pins in Ports A and B except PA12 (USB DP), and selected pins in Port C and F - verified per Table 14 (Pin Definitions) and Section 6.3.14 (I/O port characteristics) of DS10009 Rev 7.
STM32F071CBT7TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- 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:
STM32F071CBT7TR FAQ
1.How can I place an order for STM32F071CBT7TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F071CBT7TR 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 STM32F071CBT7TR reliable?
The price and inventory of STM32F071CBT7TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F071CBT7TR is usually 5 days.
3.What payment methods are accepted for STM32F071CBT7TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F071CBT7TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F071CBT7TR?
STM32F071CBT7TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F071CBT7TR 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 STM32F071CBT7TR?
For technical support, including STM32F071CBT7TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F071CBT7TR requirements.
6.How does Aetrix verify that STM32F071CBT7TR is sourced from the original manufacturer or authorized distributors?
All STM32F071CBT7TR 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 STM32F071CBT7TR meets industry standards.
7.What is the process for return or replacement of STM32F071CBT7TR?
All STM32F071CBT7TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F071CBT7TR, 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 STM32F071CBT7TR part is unused and in its original packaging.
Return procedure for STM32F071CBT7TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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