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STMicroelectronics STM32L072CZT6
- Part No.:
- STM32L072CZT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L072CZT6.pdf
- Description:
- IC MCU 32BIT 192KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,657
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Product details
Overview
STM32L072CZT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP48 package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, USB 2.0 (crystal-less), 12-bit ADC (1.14 Msps, 16 channels), and dual 12-bit DACs. It operates from 1.65–3.6 V across –40 to +125 °C and targets battery-powered IoT sensors and portable medical devices requiring long runtime and analog integration.
For engineers reviewing the STM32L072CZT6 datasheet, STM32L072CZT6 pinout, STM32L072CZT6 application, or STM32L072CZT6 equivalent, key selection criteria include ultra-low-power Stop mode current (0.43 µA), 5 µs Flash wakeup time, USB crystal-less operation, 78 5V-tolerant I/Os, and integrated capacitive touch sensing support for human-interface designs.
Technical Context
The STM32L072CZT6 implements a single-core Arm Cortex-M0+ with Memory Protection Unit (MPU), running at up to 32 MHz using multiple clock sources: HSI16 (16 MHz ±1%), HSI48 (48 MHz self-calibrated for USB), LSE (32.768 kHz RTC), and MSI (65 kHz–4.2 MHz). Its low-power architecture supports six power modes-Run, Sleep, Low-power Run, Low-power Sleep, Stop, and Standby-with dedicated voltage regulators and brownout reset (BOR) thresholds.
Analog subsystem integration includes two independent 12-bit DACs with output buffers (operable down to 1.8 V), two ultra-low-power comparators (with window mode and wake-up capability down to 1.65 V), and a 24-channel capacitive sensing controller (TSC) supporting touchkey, linear, and rotary sensors-enabling direct front-end signal conditioning without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32 MHz max, 0.95 DMIPS/MHz - delivers deterministic real-time control with minimal power overhead. |
| Memory | 192 KB Flash (dual-bank, RWW), 20 KB SRAM, 6 KB EEPROM (ECC-protected) - enables firmware updates while executing, data logging with retention, and secure parameter storage. |
| Power Modes | 0.43 µA Stop mode (16 wakeup lines), 0.29 µA Standby (3 wakeup pins), 93 µA/MHz Run - extends battery life in intermittent-sensing applications. |
| Analog Peripherals | 12-bit ADC (1.14 Msps, 16 ch), 2×12-bit DACs (buffered, 1.8 V min), 2×ULP comparators - supports simultaneous sensor acquisition, waveform generation, and threshold monitoring. |
| Connectivity | 1×USB 2.0 (crystal-less, LPM, battery charging detect), 4×USART (2 ISO 7816/IrDA), 3×I²C (2 SMBus/PMBus), 6×SPI - enables direct USB device-class connectivity and multi-protocol industrial/medical peripheral interfacing. |
| Timers & DMA | 11 timers (including RTC, LPTIM, SysTick, watchdogs), 7-channel DMA - handles precise timing, low-power periodic wakeups, and zero-CPU-overhead peripheral data movement. |
| I/O | 78 I/Os (72 5V-tolerant), 24 TSC channels - supports mixed-voltage system interfacing and robust capacitive touch UI without external ICs. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK2 certified. Pin count and layout conform to ST's standard STM32L072xZ series footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Power supply inputs | Dedicated domains for digital core (VDD), analog (VDDA), and I/O bank 2 (VDDIO2) - enable independent voltage scaling and noise isolation. |
| VSS, VSSA | Ground returns | Separate digital (VSS) and analog (VSSA) grounds - reduce coupling noise into sensitive ADC/DAC paths. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PH0–PH1 | General-purpose I/Os | 78 total GPIOs; 72 support 5V tolerance - simplify level-shifting in mixed-voltage systems (e.g., interfacing with 5V sensors or logic). |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PA15, PB0, PB1, PB2, PB10, PB11, PC0–PC7, PC13–PC15, PD2 | Capacitive sensing channels | 24 dedicated TSC input pins - allow direct connection of touch electrodes without external RC networks or controllers. |
| PA11, PA12 | USB D+/D− | Crystal-less USB 2.0 interface - eliminates external 48 MHz crystal, reducing BOM cost and PCB area for compact USB peripherals. |
| PA0, PA1, PA4, PA5, PA6, PA7, PB0, PB1, PC0–PC5, PC13–PC15 | ADC input channels | 16-channel 12-bit ADC with 1.14 Msps sampling - supports high-speed sensor polling (e.g., vibration, temperature, gas) with internal reference (1.22 V). |
| PA4, PA5 | DAC outputs | Two buffered 12-bit DACs (DAC1/DAC2) - generate precision analog waveforms or bias voltages down to 1.8 V supply, ideal for sensor excitation or calibration. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode | 0.43 µA with 16 wakeup lines - enables years of operation on coin-cell batteries in infrequent-event detection (e.g., door/window sensors). |
| Crystal-less USB 2.0 | Integrated 48 MHz HSI48 oscillator with self-calibration against USB SOF - removes external crystal and matching capacitors, lowering cost and design complexity. |
| Embedded EEPROM | 6 KB data EEPROM with ECC and 100k write cycles - stores calibrated sensor offsets, device IDs, or configuration parameters with guaranteed integrity over temperature and lifetime. |
| Capacitive touch controller (TSC) | 24-channel hardware-accelerated touch sensing - offloads CPU during touch scanning, supports proximity, slider, and wheel gestures with <1 µA active current. |
| Programmable voltage detector (PVD) | Configurable trip points (2.2–2.9 V) with interrupt/wakeup - provides early warning of battery depletion before system reset, enabling graceful shutdown or data save. |
Applications
| Smart Wearable Sensor Hub | Portable Medical Diagnostic Device |
|---|---|
Use Scenario: Wrist-worn health monitor acquiring ECG, SpO₂, and motion data intermittently every 5 minutes. IC Role / Device Role / Timing Role: Central MCU managing sensor sequencing, analog signal conditioning (ADC/DAC/comparators), USB-based firmware updates, and RTC-triggered wakeups. Use Value: 0.43 µA Stop mode + 5 µs wakeup ensures >2-year battery life; integrated DACs calibrate sensor references; crystal-less USB simplifies regulatory compliance. | Use Scenario: Handheld blood glucose meter with touch UI, LCD display, and disposable test-strip interface. IC Role / Device Role / Timing Role: Main controller handling strip insertion detection (comparator), analog strip signal processing (ADC), capacitive touch buttons (TSC), and USB data export. Use Value: 24-channel TSC enables bezel-free touch interface; 6 KB EEPROM stores calibration curves per strip batch; 5V-tolerant I/Os interface directly with legacy strip electronics. |
| Industrial Wireless Node | Energy Harvesting Sensor Endpoint |
Use Scenario: Battery- or capacitor-powered temperature/humidity node transmitting via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Low-power host managing sensor reads, LoRa transceiver control (via SPI/USART), and deep-sleep scheduling via LPTIM. Use Value: 93 µA/MHz Run efficiency minimizes energy per transmit cycle; 0.29 µA Standby with 3 wakeup pins enables external interrupt-driven wake (e.g., from motion or alarm). | Use Scenario: Solar- or thermal-harvested environmental sensor powering only during daylight or temperature gradients. IC Role / Device Role / Timing Role: Energy-aware controller that boots only when harvested voltage exceeds 1.65 V, performs measurement, logs to EEPROM, then returns to 0.29 µA Standby. Use Value: Operation down to 1.65 V supply allows use with ultra-low-output harvesters; embedded BOR with 5 thresholds ensures reliable startup across variable input conditions. |
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 core, memory, and peripherals but in LQFP64 (10×10 mm); adds CAN 2.0B controller. | Required where industrial fieldbus (CAN) integration is needed alongside USB and analog features. | Select if CAN bus communication is mandatory; otherwise, STM32L072CZT6 offers identical low-power performance in smaller LQFP48 footprint. |
| STM32L432KCU6 | Cortex-M4F core (100 MHz), FPU, higher Flash (256 KB), but higher active current (88 µA/MHz vs. 93 µA/MHz at 32 MHz); no crystal-less USB. | Suitable for math-intensive edge processing (e.g., FFT-based vibration analysis) where USB is handled externally or via external PHY. | Choose when floating-point computation or larger code space outweighs ultra-low-power USB convenience and EEPROM retention requirements. |
Compared with STM32L073RZT6, the STM32L072CZT6 saves board space and cost by omitting CAN while retaining identical analog/USB/low-power capabilities; versus STM32L432KCU6, it trades computational headroom for superior sub-µA standby current and integrated crystal-less USB-critical for size- and battery-constrained endpoints.
Availability
STM32L072CZT6 is available at Aetrix Electronics and suitable for smart wearables, portable medical diagnostics, industrial wireless nodes, and energy harvesting sensor endpoints requiring stable component supply across extended product lifecycles.
Supply support for STM32L072CZT6 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, sensors, and analog products for industrial, automotive, and consumer markets.
The STM32L0 series is engineered for ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and robust security-targeting IoT edge nodes, portable healthcare, and smart metering systems.
FAQ
What is the minimum operating voltage for the STM32L072CZT6's ADC and DAC?
The ADC operates down to 1.65 V supply (VDDA), maintaining full 12-bit linearity and 1.14 Msps throughput. Both DACs function down to 1.8 V (VDDA), delivering rail-to-rail buffered output with monotonicity guaranteed. These thresholds are validated per DS10689 Rev 5 Section 6.3.15 and 6.3.16, enabling reliable analog performance even under brownout conditions typical in battery-depleted states.
Does the STM32L072CZT6 support true hardware AES encryption?
No-the STM32L072CZT6 does not include a dedicated AES accelerator. It provides True Random Number Generation (TRNG) and firewall protection for memory isolation, but cryptographic operations rely on software libraries (e.g., STM32CubeL0 HAL crypto routines). For hardware-accelerated AES, ST's STM32L4 or STM32G0 series are required, as confirmed in DS10689 Rev 5 Sections 3.19 and 3.20.
How many I/O pins support capacitive touch sensing, and what is the maximum electrode count?
The STM32L072CZT6 supports 24 capacitive sensing channels across GPIOs including PA0–PA7, PA15, PB0–PB2, PB10–PB11, PC0–PC7, PC13–PC15, and PD2. Each channel can drive one electrode; multiplexing allows up to 24 independent touch keys, sliders, or rotary controls. This is defined in Section 3.15 and Table 9 of DS10689 Rev 5, with no external components required beyond the electrode traces.
Is the 6 KB EEPROM emulated in Flash or implemented as dedicated silicon memory?
The 6 KB EEPROM is implemented as dedicated silicon memory-not Flash emulation-with built-in ECC, 100k write/erase endurance, and 40-year data retention at 55 °C. It resides in a separate memory block (address range 0x0808 0000–0x0808 17FF) and supports byte-level writes, unlike Flash which requires page erases. This is specified in Section 3.8 and Table 53 of DS10689 Rev 5.
STM32L072CZT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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:
- 37
- 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):
- 1.65V ~ 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:
STM32L072CZT6 FAQ
1.How can I place an order for STM32L072CZT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L072CZT6 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 STM32L072CZT6 reliable?
The price and inventory of STM32L072CZT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L072CZT6 is usually 5 days.
3.What payment methods are accepted for STM32L072CZT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L072CZT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L072CZT6?
STM32L072CZT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L072CZT6 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 STM32L072CZT6?
For technical support, including STM32L072CZT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L072CZT6 requirements.
6.How does Aetrix verify that STM32L072CZT6 is sourced from the original manufacturer or authorized distributors?
All STM32L072CZT6 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 STM32L072CZT6 meets industry standards.
7.What is the process for return or replacement of STM32L072CZT6?
All STM32L072CZT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L072CZT6, 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 STM32L072CZT6 part is unused and in its original packaging.
Return procedure for STM32L072CZT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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