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STMicroelectronics STM32L072KBU6
- Part No.:
- STM32L072KBU6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32L072KBU6.pdf
- Description:
- IC MCU 32BIT 128KB FLSH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:16,629
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Product details
Overview
STM32L072KBU6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5×5 mm) package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, USB 2.0 crystal-less interface, and dual 12-bit DACs. It operates from 1.65–3.6 V across –40 to +125 °C and delivers 0.86 µA Stop mode + RTC with 20 KB RAM retention-ideal for battery-powered IoT sensor nodes and portable medical devices.
For engineers reviewing the STM32L072KBU6 datasheet, STM32L072KBU6 pinout, STM32L072KBU6 application, or STM32L072KBU6 equivalent, key selection criteria include verified low-power mode current (0.29 µA Standby), USB crystal-less timing accuracy (±0.25% via HSI48 self-calibration), 12-bit ADC performance at 1.14 Msps, and 5V-tolerant GPIO count (26 pins).
Technical Context
The STM32L072KBU6 integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling and clock gating to achieve sub-1 µA Stop/Standby modes. Its memory subsystem includes dual-bank Flash with read-while-write capability and ECC protection on both Flash and EEPROM.
Peripherals are managed via an interconnect matrix enabling concurrent DMA transfers to ADC, DAC, USART, SPI, and I²C. The USB interface uses the internal 48 MHz HSI48 oscillator with automatic calibration against LSE, eliminating external crystal requirements while maintaining ±0.25% accuracy over temperature and voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ @ up to 32 MHz; 0.95 DMIPS/MHz enables real-time control with minimal power overhead. |
| Flash / SRAM / EEPROM | 192 KB Flash (ECC, dual-bank RWW), 20 KB SRAM, 6 KB EEPROM (ECC); supports firmware updates without full erase cycles. |
| Low-power Modes | 0.29 µA Standby (3 wakeup pins), 0.43 µA Stop (16 wakeup lines), 0.86 µA Stop+RTC+20KB RAM retention-enables multi-year coin-cell operation. |
| ADC / DAC | 12-bit ADC @ 1.14 Msps (16 channels, down to 1.65 V), two 12-bit buffered DACs (down to 1.8 V); supports simultaneous analog sensing and actuation. |
| USB Interface | Crystal-less USB 2.0 FS; HSI48 auto-calibrated to LSE reference ensures ±0.25% accuracy-eliminates BOM cost and board space for external crystal. |
| I/O Voltage Tolerance | 78 of 84 GPIOs are 5V tolerant; allows direct interfacing with legacy 5V peripherals without level shifters. |
| Operating Range | 1.65–3.6 V supply, –40 to +125 °C ambient; qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
STM32L072KBU6 is housed in a 32-pin UFQFPN (5 × 5 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are validated per ST's DS10689 Rev 5, Section 4 ("Pin descriptions") and Table 16 ("STM32L072xxx pin definition").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VSS, VSSA | Power supply and ground rails | Dual-domain supply separation ensures clean analog reference and noise immunity for ADC/DAC operation. |
| PA0–PA15, PB0–PB11, PC13–PC15 | General-purpose I/Os | 26 pins 5V tolerant; support multiple alternate functions including USART, SPI, I²C, and touch sensing. |
| PA11/PA12 | USB D+/D− | Dedicated crystal-less USB interface; internally biased and ESD-protected per USB 2.0 FS spec. |
| PA4–PA7 | DAC1_OUT1 / DAC1_OUT2 / DAC2_OUT1 / DAC2_OUT2 | Direct buffered analog outputs; each supports 0–VREF or 0–2×VREF range with rail-to-rail capability. |
| PA1–PA5 | ADC_IN0–ADC_IN5 | Five dedicated ADC input channels; support single-ended and differential sampling with hardware oversampling. |
| NRST | Active-low reset input | Internal pull-up; accepts 1.65–5.5 V logic; supports external reset button or supervisor IC integration. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 0.29 µA with 3 wakeup pins enabled-reduces energy budget for infrequent event-driven wakeups. |
| Crystal-less USB | HSI48 calibrated to LSE achieves ±0.25% accuracy-removes external crystal, saves ~$0.15 BOM cost and 2 mm² PCB area. |
| EEPROM with ECC | 6 KB data EEPROM with error correction-ensures reliable parameter storage over 100k write/erase cycles and 20-year data retention. |
| Capacitive touch controller | 24-channel TSC supporting touchkey, linear, and rotary sensors-enables robust user interface without external IC. |
| True RNG | On-chip hardware random number generator compliant with NIST SP800-90B-supports secure boot and cryptographic key generation. |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition powered by CR2032 coin cell with multi-year battery life. IC Role / Device Role / Timing Role: Main MCU handling analog front-end (ADC/DAC), USB firmware update, and RTC-based data logging. Use Value: 0.86 µA Stop+RTC+20KB RAM retention preserves context during deep sleep; 12-bit ADC captures physiological waveforms at 1 ksps with <1 LSB INL. | Use Scenario: Battery-backed gas/water meter with pulse counting, tamper detection, and periodic RF upload via LPWAN. IC Role / Device Role / Timing Role: System controller managing metrology ADC, EEPROM-based billing records, and crystal-less USB for field technician configuration. Use Value: 6 KB ECC EEPROM ensures tamper-proof tariff storage; USB crystal-less interface eliminates crystal aging drift in long-life deployments. |
| Industrial Sensor Node | Portable Diagnostic Device |
Use Scenario: Wireless vibration/temperature node in factory automation, operating unattended for >5 years on primary Li-SOCl₂ battery. IC Role / Device Role / Timing Role: Low-power host for MEMS sensor fusion, BLE interface (via UART), and secure OTA updates. Use Value: 5 µs wakeup from Flash enables rapid response to alarm events; 78× 5V-tolerant GPIOs simplify connection to legacy 5V industrial sensors. | Use Scenario: Handheld blood glucose or oximetry device requiring FDA-grade analog accuracy and USB-C charging detection. IC Role / Device Role / Timing Role: Precision analog controller with dual DACs for LED driver biasing and ADC for photodiode signal conditioning. Use Value: Dual 12-bit buffered DACs drive LEDs with <0.5% gain error; USB battery charging detection complies with USB BC 1.2 spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L073RBT6 | LQFP64 package; adds CAN FD controller and extra 16 KB SRAM; no USB crystal-less mode (requires external crystal) | Suitable for CAN-based industrial networks where USB is secondary; higher pin count enables more analog inputs | Select when CAN FD or larger SRAM is required; avoid if board space or crystal-free USB is critical |
| STM32L432KCU6 | Cortex-M4F core; 256 KB Flash, 64 KB SRAM; higher active power (80 µA/MHz); no EEPROM; USB requires external crystal | Better for DSP-intensive tasks (e.g., FFT-based spectral analysis); lacks EEPROM-based nonvolatile parameter storage | Choose for floating-point math or higher throughput; not suitable for EEPROM-dependent calibration storage |
Compared with STM32L072KBU6, STM32L073RBT6 trades USB crystal-less convenience for CAN FD and memory headroom, while STM32L432KCU6 offers M4F compute power at the expense of EEPROM, ultra-low-power modes, and USB integration simplicity.
Availability
STM32L072KBU6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial sensor nodes, and portable diagnostic devices requiring stable component supply across extended product lifecycles.
Supply support for STM32L072KBU6 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, robust analog integration, and secure firmware execution-optimized for IoT edge nodes and portable medical electronics.
FAQ
What is the maximum operating frequency and core type of the STM32L072KBU6?
The STM32L072KBU6 features an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS/MHz. Its maximum frequency is constrained by supply voltage: 32 MHz at 3.0–3.6 V, 24 MHz at 2.4–2.99 V, and 16 MHz at 1.65–2.39 V-verified in DS10689 Section 6.3.1.
Does the STM32L072KBU6 support USB without an external crystal?
Yes. It integrates a factory-trimmed 48 MHz HSI48 oscillator with automatic calibration against the 32 kHz LSE crystal, achieving ±0.25% USB Full-Speed timing accuracy-confirmed in DS10689 Sections 3.5 and 6.3.7. No external crystal is required for USB compliance.
How much EEPROM is available, and what is its endurance rating?
The device includes 6 KB of on-chip data EEPROM with built-in ECC, rated for 100,000 write/erase cycles and guaranteed 20-year data retention at 55 °C-specified in DS10689 Tables 53 and 54. This replaces external serial EEPROM in space-constrained designs.
Which GPIO pins are 5V tolerant, and how many are there?
78 of the 84 GPIOs are 5V tolerant, including all pins in ports A, B, C, D, E, and H except PA13, PA14, PA15, and PB3–PB4 (SWD/JTAG pins). This is documented in DS10689 Section 3.7 and Table 60, enabling direct interfacing with 5V logic without level shifters.
STM32L072KBU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- STM32L0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 32MHz
- Connectivity:
- I2C, IrDA, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 23
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 6K x 8
- RAM Size:
- 20K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.65V ~ 3.6V
- Data Converters:
- A/D 10x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L072KBU6 FAQ
1.How can I place an order for STM32L072KBU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L072KBU6 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 STM32L072KBU6 reliable?
The price and inventory of STM32L072KBU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L072KBU6 is usually 5 days.
3.What payment methods are accepted for STM32L072KBU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L072KBU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L072KBU6?
STM32L072KBU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L072KBU6 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 STM32L072KBU6?
For technical support, including STM32L072KBU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L072KBU6 requirements.
6.How does Aetrix verify that STM32L072KBU6 is sourced from the original manufacturer or authorized distributors?
All STM32L072KBU6 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 STM32L072KBU6 meets industry standards.
7.What is the process for return or replacement of STM32L072KBU6?
All STM32L072KBU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L072KBU6, 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 STM32L072KBU6 part is unused and in its original packaging.
Return procedure for STM32L072KBU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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