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STMicroelectronics STM32L072RZT6
- Part No.:
- STM32L072RZT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L072RZT6.pdf
- Description:
- IC MCU 32BIT 192KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:516
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Product details
Overview
STM32L072RZT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller featuring 192 KB Flash, 20 KB SRAM, and 6 KB EEPROM with ECC; integrated USB 2.0 (crystal-less), dual 12-bit DACs, 12-bit ADC (1.14 Msps), and ultra-low-power comparators; deployed in battery-powered IoT sensor nodes requiring long-term operation on coin-cell power.
For engineers reviewing the STM32L072RZT6 datasheet, STM32L072RZT6 pinout, STM32L072RZT6 application, or STM32L072RZT6 equivalent, key selection criteria include standby current (0.29 µA), RTC + RAM retention in Stop mode (0.86 µA), USB crystal-less capability, 78 I/Os (5V-tolerant), and embedded true RNG for secure firmware updates.
Technical Context
The STM32L072RZT6 implements a dual-bank Flash architecture with read-while-write capability and hardware ECC, enabling safe over-the-air firmware updates without halting execution. Its clock system integrates factory-trimmed 16 MHz HSI (+/-1%), self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE with RTC calibration - supporting precise timekeeping and low-jitter USB signaling without external crystals.
Power management includes five BOR thresholds, programmable voltage detector (PVD), and dynamic voltage scaling across three operating ranges (1.65–3.6 V). Low-power modes are hierarchically optimized: Standby uses only 0.29 µA with 3 wakeup pins; Stop + RTC + 20 KB RAM retention draws just 0.86 µA; and Run mode achieves 93 µA/MHz efficiency at 32 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ @ up to 32 MHz; 0.95 DMIPS/MHz; MPU for memory protection in safety-critical tasks |
| Memory | 192 KB Flash (dual-bank, ECC, RWW); 20 KB SRAM; 6 KB data EEPROM (ECC); 20-byte backup registers |
| Low-Power Performance | 0.29 µA Standby (3 wakeup pins); 0.86 µA Stop + RTC + 20 KB RAM retention; 93 µA/MHz Run mode |
| Analog Peripherals | 12-bit ADC (1.14 Msps, 16 channels, down to 1.65 V); 2×12-bit DACs with buffers (down to 1.8 V); 2 ultra-low-power comparators |
| Connectivity | USB 2.0 crystal-less (LPM, battery charging detection); 4×USART (2 ISO 7816/IrDA), 1×LPUART; 6×SPI (16 Mbit/s); 3×I2C (2 SMBus/PMBus) |
| Timers & Security | 11 timers including RTC, ultra-low-power LPTIM, SysTick, 2 watchdogs; CRC unit; 96-bit unique ID; true RNG; firewall protection |
| Package & I/O | LQFP64 (10×10 mm); 78 I/Os (72 5V-tolerant); ECOPACK2-compliant |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, ECOPACK2 certified; suitable for reflow soldering and industrial temperature range (-40 °C to +125 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Power supply inputs | Separate analog/digital domains enable noise isolation; VDDIO2 supports 5V-tolerant I/Os at 1.65–3.6 V core supply |
| VSS, VSSA | Ground returns | Dedicated analog ground minimizes ADC/DAC reference noise; split planes reduce coupling in mixed-signal operation |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PH0–PH1 | General-purpose I/Os | 78 total GPIOs; 72 support 5V tolerance; configurable as EXTI, AF, or capacitive sensing inputs (up to 24 channels) |
| PA11/PA12 | USB D+/D− | Crystal-less USB 2.0 interface; internal transceiver with battery charging detection and LPM support |
| PA0, PA1, PA4, PA5, PA6, PA7, PB0, PB1, PB2, PB10, PB11, PC0–PC5, PC13, PC14, PC15 | Wakeup sources | 16 dedicated Stop-mode wakeup lines + 3 Standby-mode pins enable flexible low-power event triggering |
| PC13, PC14, PC15 | RTC oscillator inputs | Support 32.768 kHz crystal or external clock; calibrated RTC maintains ±0.5 ppm accuracy over temperature |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power BOR | 5 selectable brownout reset thresholds (1.65–2.9 V) ensure robust operation across battery discharge curves |
| Self-calibrating HSI48 | 48 MHz RC oscillator auto-calibrated to ±0.25% for USB timing compliance without external crystal |
| Capacitive sensing controller (TSC) | 24-channel hardware-accelerated touch sensing supporting touchkey, linear, and rotary sensors with <1 µA active current |
| True random number generator (RNG) | FIPS 140-2 compliant entropy source for secure key generation and cryptographic initialization |
| Pre-programmed bootloader | Factory-loaded USB and USART bootloader enables field firmware updates without debug interface |
Applications
| Smart Utility Meter | Wireless Sensor Node |
|---|---|
Use Scenario: Battery-operated water/gas meter logging consumption every 15 minutes and transmitting via NB-IoT/LPWAN. IC Role / Device Role / Timing Role: Main MCU managing metrology ADC sampling, RTC-based scheduling, secure OTA updates, and low-power radio interface control. Use Value: 0.86 µA Stop + RTC + full RAM retention extends 10-year battery life; USB bootloader simplifies firmware certification and field patching. | Use Scenario: Environmental monitoring node measuring temperature, humidity, and CO₂ in HVAC ducts using battery or energy harvesting. IC Role / Device Role / Timing Role: System controller acquiring analog sensor data via 12-bit ADC, processing with Cortex-M0+, and waking peripherals only during measurement cycles. Use Value: 93 µA/MHz Run efficiency and 5 µs Flash wakeup minimize active time; dual DACs calibrate analog front-end references in situ. |
| Medical Wearable Patch | Industrial Predictive Maintenance Sensor |
Use Scenario: ECG/PPG patch continuously monitoring vital signs with motion artifact compensation and local anomaly detection. IC Role / Device Role / Timing Role: Real-time signal processor running biosignal algorithms, managing ultra-low-power comparators for R-peak detection, and buffering data in retained RAM. Use Value: 2×12-bit DACs generate precision bias voltages for analog front-end; true RNG seeds encryption for HIPAA-compliant BLE transmission. | Use Scenario: Vibration and temperature sensor mounted on motor bearings, performing FFT analysis and edge inference before wireless upload. IC Role / Device Role / Timing Role: Edge AI accelerator interfacing MEMS accelerometers via SPI, executing lightweight ML models in SRAM, and entering Stop mode between 1-second sampling intervals. Use Value: 78 5V-tolerant I/Os simplify connection to legacy industrial sensors; CRC unit ensures integrity of firmware and configuration data. |
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 |
|---|---|---|---|
| STM32L073RZT6 | Same package and pinout; adds LCD controller (4x40 segment) and extra 2 KB SRAM | Required for segment-based display interfaces (e.g., smart thermostats); unnecessary overhead for headless sensor nodes | Select when integrated LCD driving eliminates external display driver IC and reduces BOM count |
| STM32L082KZT6 | LQFP32 package; reduced I/O count (29), smaller Flash (64 KB), no USB, no DAC | Suitable for space-constrained, cost-sensitive designs with minimal analog requirements (e.g., simple BLE beacon) | Choose for footprint-limited PCBs where USB and dual DAC are not needed - saves ~30% in unit cost |
Compared with STM32L073RZT6, the STM32L072RZT6 trades LCD capability for lower system cost and identical low-power performance; versus STM32L082KZT6, it delivers full USB connectivity and richer analog integration at the expense of larger footprint and higher unit price - making it optimal for feature-complete, battery-powered edge nodes.
Availability
STM32L072RZT6 is available at Aetrix Electronics and suitable for battery-powered IoT sensor nodes, portable medical devices, and smart utility meters requiring stable component supply and long-term lifecycle assurance.
Supply support for STM32L072RZT6 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, sensors, and automotive ICs with strong focus on energy efficiency and industrial reliability.
The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, secure firmware execution, and rich analog integration - designed specifically for intelligent edge endpoints in constrained environments.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L072RZT6 operates up to 32 MHz with 0.95 DMIPS/MHz performance. At full speed, typical Run mode current is 2.98 mA (93 µA/MHz) with code executing from Flash at 3.3 V and 25 °C. This value scales linearly with clock frequency and supply voltage, and drops to 2.25 mA when executing from RAM due to eliminated Flash wait states.
Does the device support crystal-less USB operation, and what are the timing accuracy requirements?
Yes - the integrated HSI48 oscillator is factory-calibrated and self-tuned to maintain ±0.25% accuracy over voltage and temperature, meeting USB Full-Speed (12 Mbps) timing requirements without external crystal. No external USB clock source is needed, reducing BOM cost and PCB area while maintaining LPM and battery charging detection functionality.
How many I/O pins support 5V tolerance, and under what conditions?
72 of the 78 GPIOs are 5V tolerant when VDD is ≥2.0 V, per datasheet Section 6.3.13. This applies to all pins except those dedicated to USB (PA11/PA12), oscillator inputs (PC14/PC15), and BOOT0 - enabling direct interfacing with legacy 5V logic, industrial sensors, and RS-232 level shifters without external translators.
What security features are hardware-implemented for firmware protection?
The STM32L072RZT6 includes a memory firewall protecting Flash and SRAM regions from unauthorized access, hardware CRC calculation for firmware image integrity checks, 96-bit unique device ID for secure binding, and a FIPS 140-2 compliant true RNG for cryptographic key generation - all enforced at silicon level without software dependency.
STM32L072RZT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- 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:
- 51
- Program Memory Size:
- 192KB (192K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 6K x 8
- RAM Size:
- 20K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L072RZT6 FAQ
1.How can I place an order for STM32L072RZT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L072RZT6 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 STM32L072RZT6 reliable?
The price and inventory of STM32L072RZT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L072RZT6 is usually 5 days.
3.What payment methods are accepted for STM32L072RZT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L072RZT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L072RZT6?
STM32L072RZT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L072RZT6 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 STM32L072RZT6?
For technical support, including STM32L072RZT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L072RZT6 requirements.
6.How does Aetrix verify that STM32L072RZT6 is sourced from the original manufacturer or authorized distributors?
All STM32L072RZT6 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 STM32L072RZT6 meets industry standards.
7.What is the process for return or replacement of STM32L072RZT6?
All STM32L072RZT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L072RZT6, 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 STM32L072RZT6 part is unused and in its original packaging.
Return procedure for STM32L072RZT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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