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STMicroelectronics STM32L072CZT7TR
- Part No.:
- STM32L072CZT7TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L072CZT7TR.pdf
- Description:
- IC MCU 32BIT 192KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,345
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Product details
Overview
STM32L072CZT7TR 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, USB 2.0 crystal-less interface, and dual 12-bit DACs. It operates from 1.65 V to 3.6 V across –40 °C to +125 °C and delivers 0.86 µA Stop mode + RTC with 20-KB RAM retention - ideal for battery-powered industrial sensors and portable medical monitors.
For engineers reviewing the STM32L072CZT7TR datasheet, STM32L072CZT7TR pinout, STM32L072CZT7TR application, or STM32L072CZT7TR equivalent, key selection considerations include its 0.43 µA Stop mode current, 5 µs Flash wakeup time, USB crystal-less capability, and 78 5V-tolerant I/Os - all critical for energy-constrained edge-node designs requiring mixed-signal integration and long-term firmware field updates.
Technical Context
The STM32L072CZT7TR integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling and clock gating across seven low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby). Its clock system combines HSI16 (±1%), HSI48 (self-calibrated for USB), LSE (32 kHz RTC), and MSI (65 kHz–4.2 MHz) oscillators, plus PLL for CPU frequency up to 32 MHz.
Analog subsystem includes a 12-bit ADC (1.14 Msps, 16 channels, down to 1.65 V), two buffered 12-bit DACs (down to 1.8 V), two ultra-low-power comparators with window mode and wake-up capability, and 24-channel capacitive sensing controller - all independently powered and configurable in Stop mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ with MPU, 32 MHz max - enables deterministic real-time control with memory protection in resource-constrained systems. |
| Flash / SRAM / EEPROM | 192 KB Flash (ECC, read-while-write), 20 KB SRAM, 6 KB EEPROM (ECC) - supports robust firmware storage, data logging, and parameter retention without external nonvolatile memory. |
| Low-power Performance | 0.43 µA Stop mode (16 wakeup lines), 0.86 µA Stop + RTC + 20-KB RAM retention - extends coin-cell battery life to multi-year operation in always-on sensor nodes. |
| ADC/DAC | 12-bit ADC (1.14 Msps, 16 ch, 1.65 V min), 2×12-bit DACs with buffers (1.8 V min) - enables high-fidelity analog acquisition and precision actuator control from single supply. |
| USB Interface | Crystal-less USB 2.0 FS with battery charging detection and LPM - eliminates external crystal and reduces BOM cost/size in portable USB-peripheral applications. |
| I/O Capability | 78 I/Os (5V tolerant), 84 fast I/Os total - simplifies level-shifting design and enables direct interfacing with legacy 5V peripherals or sensors. |
| Operating Range | 1.65 V to 3.6 V supply, –40 °C to +125 °C ambient - certified for industrial automation, smart metering, and automotive cabin electronics. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for compact PCB layout and thermal dissipation in space-constrained modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD/VSS | Power supply / Ground | Dual power/ground pairs ensure stable core and I/O domain operation; VDDA/VSSA separate analog supply improves ADC/DAC SNR. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15 | General-purpose I/O | 78 pins support 5V tolerance, multiple alternate functions (USART, SPI, I2C, USB, timers), enabling flexible peripheral routing and board reuse. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PA8, PA9, PA10, PA11, PA12, PA13, PA14, PA15, PB0, PB1, PB2, PB10, PB11, PB12, PB13, PB14, PB15, PC0, PC1, PC2, PC3, PC4, PC5, PC6, PC7, PC8, PC9, PC10, PC11, PC12, PC13, PC14, PC15, PD0, PD1, PD2, PD3, PD4, PD5, PD6, PD7, PD8, PD9, PD10, PD11, PD12, PD13, PD14, PD15 | Alternate function mapping | Each GPIO supports up to 16 alternate functions (e.g., USART2_TX on PA2, USB_DM on PA11, USB_DP on PA12) - allows full peripheral concurrency without pin conflict. |
| NRST | Reset input | Active-low reset with internal pull-up; accepts 1.65–3.6 V logic - ensures reliable initialization under brownout or ESD stress. |
| BOOT0 | Boot mode select | High at power-up enables system memory bootloader (USART/USB); controlled via external pull-down for normal Flash execution - simplifies field firmware recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode + RTC | 0.86 µA with 20-KB RAM retention - preserves full context and real-time clock while minimizing energy per wake event in periodic sensing. |
| Crystal-less USB 2.0 FS | HSI48 self-calibration against USB SOF packets - eliminates 12 MHz crystal, reducing component count and PCB area by ~2 mm². |
| Embedded ECC on Flash & EEPROM | Single-bit error correction and double-bit error detection - prevents silent data corruption in safety-critical firmware or calibration storage over 10+ year deployments. |
| Capacitive touch sensing (TSC) | 24-channel controller with shield electrode support - enables robust touchkey, slider, and rotary encoder interfaces without external ICs or firmware overhead. |
| True random number generator (RNG) | NIST SP800-90B compliant entropy source - provides cryptographically secure keys for TLS handshake, secure boot, and device attestation. |
Applications
| Smart Utility Meter | Portable ECG Monitor |
|---|---|
Use Scenario: Battery-powered electricity/water/gas meter collecting hourly consumption data and transmitting via NB-IoT or LoRaWAN. IC Role / Device Role: Main system controller managing metrology ADC sampling, real-time tariff calculation, secure wireless stack, and deep-sleep scheduling. Use Value: 0.43 µA Stop mode and 5 µs wakeup enable >10-year battery life; integrated USB and AES firewall support secure firmware updates in-field. | Use Scenario: Handheld clinical-grade ECG device acquiring 3-lead signals, performing real-time arrhythmia detection, and storing waveform history. IC Role / Device Role: Signal acquisition and processing unit driving 12-bit ADC (1.14 Msps), buffering data in 20 KB SRAM, and generating analog lead-off alerts via DAC outputs. Use Value: Dual 12-bit DACs provide precise reference voltages for lead-off detection; 125 °C rating ensures reliability inside sterilized enclosures. |
| Industrial Wireless Sensor Node | Smart Building Occupancy Controller |
Use Scenario: DIN-rail mounted temperature/humidity/CO₂ sensor node with Zigbee/Thread radio, operating unattended for 5+ years on AA batteries. IC Role / Device Role: Sensor fusion hub aggregating I²C sensor data, running Kalman filter, and managing radio sleep/wake cycles via LPTIM. Use Value: 78 5V-tolerant I/Os simplify connection to legacy HVAC sensors; 6 KB EEPROM stores calibration coefficients with ECC for lifetime accuracy. | Use Scenario: Wall-mounted occupancy/vacancy controller using capacitive touch and PIR to manage lighting, HVAC, and blinds in office environments. IC Role / Device Role: Multi-modal input processor handling 24-channel TSC for touch UI, analog comparator inputs for PIR signal conditioning, and PWM outputs for dimmable LED drivers. Use Value: Integrated TSC eliminates external touch controller; ultra-low-power comparators detect motion-triggered wake events at <1 µA total system current. |
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/peripherals but LQFP64 package, 100-pin variant with additional UART, SPI, and I²C instances. | Required when >78 I/Os or extra communication interfaces (e.g., dual CAN + USB) are needed. | Select only if board redesign accommodates larger footprint and higher pin count; not drop-in compatible. |
| STM32L432KCU6 | Cortex-M4F core, 256 KB Flash, FPU, no EEPROM, higher active current (81 µA/MHz), 1.71–3.6 V range. | Better suited for floating-point math (motor control, audio), but lacks EEPROM and has weaker low-power metrics (1.2 µA Stop). | Choose for compute-intensive tasks where ultra-low Stop current is secondary; requires firmware porting due to architecture change. |
Compared with STM32L072CZT7TR, STM32L073RZT6 offers expanded I/O and interface count at the cost of larger size, while STM32L432KCU6 trades ultra-low-power efficiency for DSP capability - making the CZT7TR optimal for battery longevity and mixed-signal integration in compact form factors.
Availability
STM32L072CZT7TR is available at Aetrix Electronics and suitable for smart utility meters, portable medical devices, industrial wireless sensor nodes, and smart building occupancy controllers requiring stable component supply and long-term lifecycle assurance.
Supply support for STM32L072CZT7TR 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 extended battery life, robust security, and rich analog integration - with the L072 specifically engineered for cost-sensitive, space-constrained IoT endpoints requiring USB connectivity and EEPROM-based data persistence.
FAQ
What is the maximum operating frequency and core type of the STM32L072CZT7TR?
The STM32L072CZT7TR features an Arm Cortex-M0+ core with a maximum CPU frequency of 32 MHz. It achieves 0.95 DMIPS/MHz performance and includes a Memory Protection Unit (MPU) for secure task isolation. The core supports Thumb-2 instruction set and operates across the full 1.65–3.6 V supply range without derating.
Does the STM32L072CZT7TR support USB without an external crystal?
Yes - it integrates a factory-trimmed 48 MHz HSI48 oscillator with automatic self-calibration against USB Start-of-Frame (SOF) tokens, enabling full-speed (12 Mbps) crystal-less USB 2.0 operation. This eliminates the need for an external 12 MHz crystal and associated load capacitors, reducing BOM cost and PCB area.
How much EEPROM is available, and is it protected against corruption?
The device includes 6 KB of data EEPROM with built-in Error Correction Code (ECC) for single-bit correction and double-bit detection. This ensures data integrity over 100,000 write/erase cycles and 20-year data retention at 85 °C - critical for storing calibration constants, device IDs, or usage logs in unattended deployments.
What low-power modes are supported, and what is the lowest achievable current?
It supports seven low-power modes: Run, Sleep, Low-power Run/Sleep, Stop, and Standby. The lowest current is 0.29 µA in Standby mode with three wakeup pins enabled. With RTC and 20 KB RAM retention active, Stop mode draws just 0.86 µA - verified per DS10689 Rev 5 electrical characteristics tables.
STM32L072CZT7TR 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, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, 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; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L072CZT7TR FAQ
1.How can I place an order for STM32L072CZT7TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L072CZT7TR 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 STM32L072CZT7TR reliable?
The price and inventory of STM32L072CZT7TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L072CZT7TR is usually 5 days.
3.What payment methods are accepted for STM32L072CZT7TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L072CZT7TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L072CZT7TR?
STM32L072CZT7TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L072CZT7TR 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 STM32L072CZT7TR?
For technical support, including STM32L072CZT7TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L072CZT7TR requirements.
6.How does Aetrix verify that STM32L072CZT7TR is sourced from the original manufacturer or authorized distributors?
All STM32L072CZT7TR 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 STM32L072CZT7TR meets industry standards.
7.What is the process for return or replacement of STM32L072CZT7TR?
All STM32L072CZT7TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L072CZT7TR, 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 STM32L072CZT7TR part is unused and in its original packaging.
Return procedure for STM32L072CZT7TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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