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STMicroelectronics STM32L071CZT3TR
- Part No.:
- STM32L071CZT3TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L071CZT3TR.pdf
- Description:
- IC MCU 32BIT 192KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,890
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Product details
Overview
STM32L071CZT3TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP48 package, featuring 192 KB Flash, 20 KB SRAM, 6 KB EEPROM with ECC, 12-bit ADC (1.14 Msps), and operation from 1.65 V to 3.6 V across –40 °C to 125 °C. It delivers 0.86 µA Stop mode + RTC + RAM retention and supports battery-powered industrial sensors and smart metering endpoints.
For engineers reviewing the STM32L071CZT3TR datasheet, STM32L071CZT3TR pinout, STM32L071CZT3TR application, or STM32L071CZT3TR equivalent, key selection criteria include ultra-low-power mode current (0.29 µA Standby), 78 I/Os (5V tolerant), integrated EEPROM endurance (100k cycles), and dual ultra-low-power comparators with wake-up capability down to 1.65 V.
Technical Context
The device implements a Cortex-M0+ core with MPU, running at up to 32 MHz with 0.95 DMIPS/MHz performance and dynamic voltage scaling support. Its memory subsystem includes dual-bank Flash with read-while-write capability and ECC protection for both Flash and EEPROM.
Low-power architecture integrates five operational modes (Run, Sleep, Low-power Run, Low-power Sleep, Stop, Standby), with hardware-accelerated wakeup from Stop in 5 µs and dedicated peripherals like LPTIM, ultra-low-power comparators, and calibrated temperature sensor-all functional down to 1.65 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32 MHz max, 0.95 DMIPS/MHz - enables deterministic real-time control with minimal power overhead |
| Flash / EEPROM | 192 KB Flash with ECC & RWW; 6 KB EEPROM with ECC - supports firmware updates without data loss and robust non-volatile parameter storage |
| RAM | 20 KB SRAM with hardware parity - ensures data integrity during low-power retention and interrupt handling |
| ADC | 12-bit, 1.14 Msps, 16-channel, down to 1.65 V - enables high-resolution sensor acquisition in wide-input-range battery systems |
| Low-power Modes | 0.29 µA Standby (3 wakeup pins); 0.86 µA Stop + RTC + 20 KB RAM retention - extends coin-cell life beyond 10 years in always-on monitoring nodes |
| I/O Count | 48-pin LQFP package with 37 GPIOs (78 total I/Os across variants, 78 I/Os 5V tolerant) - provides flexible peripheral routing and legacy interface compatibility |
| Clock Sources | HSI16 (±1%), LSE (32 kHz RTC), MSI (65 kHz–4.2 MHz), PLL - eliminates external crystal need while maintaining RTC accuracy and dynamic frequency scaling |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, ECOPACK2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VSS, VSSA | Power supply and ground rails | Dual-domain supply separation enables precise analog measurement and noise isolation for ADC/comparators |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15 | General-purpose I/Os | 78 total I/Os (5V tolerant on 78 pins); configurable as GPIO, EXTI, or 22 alternate functions including USART/I2C/SPI |
| NRST | Active-low reset input | Internal pull-up; accepts 1.65–3.6 V logic; supports external reset and programmable PVD-triggered reset |
| BOOT0 | Boot mode selection | High at reset enables system memory bootloader via USART/I2C/SPI - simplifies field firmware recovery without debugger |
| OSC_IN / OSC_OUT | External crystal oscillator terminals | Supports 1–25 MHz crystals; optional bypass mode for external clock injection into HSE input |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 0.29 µA with 3 wakeup pins enabled - enables long-term environmental logging with motion-triggered wake |
| Embedded EEPROM | 6 KB with ECC and 100k write/erase cycles - eliminates external EEPROM chip and reduces BOM cost in utility metering |
| Dual ultra-low-power comparators | Operational down to 1.65 V with window mode and independent wakeup capability - replaces discrete comparator circuits in battery voltage monitoring |
| Hardware CRC unit | 32-bit polynomial engine supporting multiple standards (CRC-32, CRC-16) - accelerates firmware signature verification and data packet integrity checks |
| Serial wire debug (SW-DP) | Single-pin debug interface with full SWD protocol support - enables in-circuit debugging and flash programming with minimal PCB footprint |
Applications
| Smart Utility Metering | Wireless Sensor Node |
|---|---|
Use Scenario: Gas/water/electricity meter with tamper detection, pulse counting, and LoRaWAN backhaul. IC Role / Device Role / Timing Role: Main controller managing metrology ADC sampling, EEPROM-based tariff storage, RTC-driven billing cycles, and secure firmware updates. Use Value: 0.86 µA Stop+RTC mode extends 10-year battery life; integrated EEPROM avoids external component failure points in sealed meters. | Use Scenario: Battery-powered temperature/humidity node transmitting via BLE or Sub-GHz RF every 5 minutes. IC Role / Device Role / Timing Role: System-on-chip host managing sensor I²C reads, LPTIM-triggered periodic wake, and low-power UART-to-RF bridge. Use Value: 5 µs wakeup from Flash enables rapid sensor sampling bursts; 78 5V-tolerant I/Os simplify direct connection to legacy analog sensors. |
| Industrial Condition Monitoring | Portable Medical Device |
Use Scenario: Vibration and temperature monitor on rotating machinery with predictive maintenance edge analytics. IC Role / Device Role / Timing Role: Real-time data aggregator running FFT on ADC samples, storing event logs in EEPROM, and triggering alerts via USART. Use Value: Dual comparators detect over-threshold events with sub-millisecond latency; 12-bit ADC resolution captures subtle waveform anomalies. | Use Scenario: Handheld blood glucose meter with LCD, button interface, and USB charging. IC Role / Device Role / Timing Role: Power-aware controller managing battery gauge ADC, capacitive touch sensing, segment LCD driver, and USB enumeration. Use Value: 1.65 V minimum operating voltage allows full functionality until battery reaches 2.0 V; calibrated temperature sensor enables ambient compensation of electrochemical readings. |
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 |
|---|---|---|---|
| STM32L072CZT6 | Same package and pinout; adds AES-128 crypto accelerator and true random number generator (TRNG) | Required for secure firmware OTA updates or encrypted sensor data transmission | Select when cryptographic operations are mandatory; otherwise identical power/performance profile |
| STM32L031K6T6 | Smaller footprint (LQFP32); 32 KB Flash, 8 KB SRAM, no EEPROM; same core and low-power architecture | Suitable for cost-sensitive, space-constrained designs with simpler firmware and external non-volatile storage | Choose for entry-level applications where EEPROM and extended I/O count are unnecessary |
Compared with STM32L072CZT6, the STM32L071CZT3TR lacks hardware crypto but matches all low-power specs and EEPROM capacity; versus STM32L031K6T6, it offers triple Flash, 2.5× RAM, full EEPROM, and 11 additional I/Os-justifying its use in feature-rich, long-life embedded systems.
Availability
STM32L071CZT3TR is available at Aetrix Electronics and suitable for smart metering, wireless sensor networks, industrial condition monitoring, and portable medical devices requiring stable component supply across extended product lifecycles.
Supply support for STM32L071CZT3TR 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications, emphasizing energy efficiency, integrated non-volatile memory, and robust operation across extended temperature and voltage ranges for battery-operated and energy-harvesting systems.
FAQ
What is the maximum operating frequency and associated power consumption in Run mode?
The STM32L071CZT3TR operates up to 32 MHz with dynamic voltage scaling. At 32 MHz and 3.3 V, typical Run mode current is 93 µA/MHz (≈3.0 mA total). With code executing from Flash, active current drops to 82 µA/MHz at 16 MHz, balancing performance and battery longevity for intermittent sensing tasks.
Does this MCU support hardware encryption or secure boot features?
No, the STM32L071CZT3TR does not include hardware AES, PKA, or secure boot engines. It relies on software-based security primitives. For certified secure firmware execution, ST recommends the STM32L072xx or STM32L082xx variants, which integrate AES-128, TRNG, and memory protection units compliant with IEC 62443.
How many I/O pins support 5V tolerance, and what is the safe input voltage range?
All 78 GPIOs across the STM32L071xZ family are 5V tolerant when configured as inputs, meaning they safely accept 0–5.5 V signals regardless of VDD level (1.65–3.6 V). This allows direct interfacing with legacy 5V logic, RS-232 transceivers, and industrial sensors without level-shifting circuitry.
What development tools and debug interfaces are supported?
The device supports Serial Wire Debug (SWD) via SWCLK/SWDIO pins, compatible with ST-LINK/V2-1, J-Link, and CMSIS-DAP debuggers. ST provides STM32CubeMX for initialization code generation, STM32CubeIDE for compilation/debugging, and the NUCLEO-L073RZ board for rapid prototyping with Arduino-compatible headers and onboard ST-LINK.
STM32L071CZT3TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32L0
- Packaging:
- Tape & Reel (TR)
- 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
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 40
- 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 13x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L071CZT3TR FAQ
1.How can I place an order for STM32L071CZT3TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L071CZT3TR 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 STM32L071CZT3TR reliable?
The price and inventory of STM32L071CZT3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L071CZT3TR is usually 5 days.
3.What payment methods are accepted for STM32L071CZT3TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L071CZT3TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L071CZT3TR?
STM32L071CZT3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L071CZT3TR 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 STM32L071CZT3TR?
For technical support, including STM32L071CZT3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L071CZT3TR requirements.
6.How does Aetrix verify that STM32L071CZT3TR is sourced from the original manufacturer or authorized distributors?
All STM32L071CZT3TR 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 STM32L071CZT3TR meets industry standards.
7.What is the process for return or replacement of STM32L071CZT3TR?
All STM32L071CZT3TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L071CZT3TR, 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 STM32L071CZT3TR part is unused and in its original packaging.
Return procedure for STM32L071CZT3TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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