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STMicroelectronics STM32L072RZT6TR
- Part No.:
- STM32L072RZT6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L072RZT6TR.pdf
- Description:
- IC MCU 32BIT 192KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
STM32L072RZT6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller featuring 192 KB Flash, 20 KB SRAM, 6 KB EEPROM with ECC, USB 2.0 (crystal-less), and dual 12-bit DACs - deployed in battery-powered IoT sensor nodes requiring sub-100 µA/MHz active current and <5 µs wake-up from Flash.
For engineers reviewing the STM32L072RZT6TR datasheet, STM32L072RZT6TR pinout, STM32L072RZT6TR application, or STM32L072RZT6TR equivalent, key selection criteria include verified 1.65–3.6 V operation, 125 °C extended temperature support, Stop mode + RTC + 20 KB RAM retention at 0.86 µA, and LQFP64 package compatibility with capacitive touch sensing up to 24 channels.
Technical Context
The STM32L072RZT6TR integrates a Cortex-M0+ core with MPU, running at up to 32 MHz with 0.95 DMIPS/MHz performance and dynamic voltage scaling. Its clock system combines HSI16 (±1%), HSI48 (self-calibrated for USB), LSE (32 kHz RTC), and PLL for flexible peripheral synchronization.
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 a dedicated Touch Sensing Controller supporting linear/rotary sensors - all operating within the same ultra-low-power domain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32 MHz max, 0.95 DMIPS/MHz - enables deterministic real-time control in energy-constrained edge devices. |
| Memory | 192 KB Flash (ECC, read-while-write), 20 KB SRAM, 6 KB EEPROM (ECC) - supports firmware updates, data logging, and parameter storage without external memory. |
| Power Consumption | 0.86 µA in Stop mode + RTC + 20 KB RAM retention - sustains time-critical background operations on coin-cell batteries for years. |
| ADC/DAC | 12-bit ADC (1.14 Msps, 16 ch), 2×12-bit DACs with buffers - enables high-fidelity analog signal acquisition and precise actuator control in sensor fusion systems. |
| USB Interface | USB 2.0 crystal-less, battery charging detection, LPM - eliminates external crystal and reduces BOM cost while supporting direct USB connectivity in portable devices. |
| Operating Range | 1.65 V to 3.6 V supply, –40 °C to +125 °C - certified for industrial and automotive under-hood environments without derating. |
| Capacitive Sensing | 24-channel TSC supporting touchkey, linear, and rotary sensors - enables robust human interface design with low EMI susceptibility and noise immunity. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for thermal dissipation in compact industrial modules and supports automated optical inspection (AOI) due to gull-wing lead geometry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.65–3.6 V) | Supplies core, SRAM, and most peripherals; requires local 100 nF decoupling per VDD pin for stable low-power operation. |
| VSS | Digital ground reference | Must be connected to low-impedance PCB ground plane; separate analog/digital ground routing recommended for ADC/DAC accuracy. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE3, PH0–PH1 | General-purpose I/Os (78 total, 5V tolerant) | Support multiple alternate functions (USART, SPI, I2C, timers); 5V tolerance allows direct interfacing with legacy logic without level shifters. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB2, PC0–PC7, PD0–PD7, PE0–PE3, PH0–PH1 | Capacitive sensing inputs (24 channels) | Configurable as TSC electrodes; require specific PCB layout (guard rings, trace length matching) to achieve >100:1 signal-to-noise ratio. |
| PA11, PA12 | USB D+/D− | Crystal-less USB 2.0 interface; internal transceivers eliminate external PHY; require 1.5 kΩ pull-up on PA12 for device enumeration. |
| PC13, PC14, PC15 | RTC oscillator inputs (LSE) | Support 32.768 kHz crystal for precision real-time clock; calibration register enables ±1 ppm accuracy over temperature. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode + RTC + 20 KB RAM retention | 0.86 µA - enables long-term timestamped data buffering in smart meters without backup battery. |
| Self-calibrating 48 MHz RC oscillator (HSI48) | Meets USB full-speed timing requirements without external crystal - reduces component count and board area by 20%. |
| Dual 12-bit DACs with output buffers | Drive 5 kΩ loads directly at 1.8–3.6 V - eliminates external op-amps in analog output stages for valve control or sensor biasing. |
| Programmable voltage detector (PVD) | 5 selectable thresholds between 1.9 V and 3.4 V - provides early warning of brownout conditions before system reset occurs. |
| True random number generator (RNG) + firewall protection | FIPS-compliant entropy source and memory access isolation - satisfies IEC 62443-3-3 security requirements for industrial firmware updates. |
Applications
| Smart Utility Metering | Portable Medical Sensor Hub |
|---|---|
Use Scenario: Battery-powered gas/water meter with hourly pressure/temperature logging and LoRaWAN transmission. IC Role / Device Role / Timing Role: Main controller managing sensor acquisition, RTC-timed sleep/wake cycles, secure firmware updates, and USB-based field calibration. Use Value: 0.86 µA Stop+RTC mode extends 10-year battery life; integrated EEPROM stores calibration coefficients with ECC protection against radiation-induced bit flips. |
Use Scenario: Wearable ECG patch with dry-electrode sensing, motion artifact correction, and Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Signal processor acquiring 12-bit ADC data at 1 ksps, applying digital filtering, and driving dual DACs for electrode bias compensation. Use Value: Dual buffered DACs enable real-time common-mode voltage adjustment; 24-channel TSC supports on-device button-free UI via proximity gesture detection. |
| Industrial Predictive Maintenance Node | Automotive Cabin Environment Monitor |
Use Scenario: Vibration and temperature node mounted on motor housing, transmitting FFT features via CAN FD gateway. IC Role / Device Role / Timing Role: Edge AI inference accelerator using CMSIS-NN, coordinating ADC oversampling, DMA-accelerated FFT, and watchdog-monitored USB diagnostics. Use Value: 125 °C rating ensures reliability near heat sources; CRC unit validates firmware integrity during OTA updates in harsh EMI environments. |
Use Scenario: Dashboard-mounted CO₂/VOC/humidity monitor with auto-compensated NDIR sensing and haptic feedback. IC Role / Device Role / Timing Role: Multi-sensor fusion hub synchronizing I2C gas sensors, 12-bit ADC for thermistor chains, and PWM-driven piezo haptics. Use Value: 7-channel DMA offloads CPU during concurrent sensor reads; ultra-low-power comparators detect rapid air quality threshold breaches for immediate alert generation. |
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 | Includes LCD controller (4x40 segment), no USB crystal-less support - adds display drive capability but removes USB convenience. | Suitable for segment-LCD-based industrial HMIs where USB is not required. | Select when integrated display driver is needed and USB connectivity is handled externally. |
| STM32L432KCU6 | Cortex-M4F core, FPU, 256 KB Flash, 64 KB SRAM, but higher active current (81 µA/MHz vs 93 µA/MHz) and no EEPROM. | Better for floating-point sensor fusion algorithms, but lacks EEPROM-based parameter retention and has larger footprint (UFQFPN32). | Choose for math-intensive edge AI workloads where Flash/SRAM headroom outweighs EEPROM and ultra-low-power Stop mode needs. |
Compared with STM32L072RZT6TR, STM32L073RZT6 trades USB flexibility for LCD integration, while STM32L432KCU6 upgrades compute capability at the expense of EEPROM persistence and sub-µA Stop mode efficiency - making the RZT6TR optimal for battery-critical, mixed-signal, USB-connected endpoints.
Availability
STM32L072RZT6TR is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensor hubs, and industrial predictive maintenance nodes requiring stable component supply across multi-year production cycles.
Supply support for STM32L072RZT6TR 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, MEMS, and automotive semiconductors since 1987.
The STM32L0 series targets ultra-low-power embedded applications demanding extended battery life, robust analog integration, and industrial-grade reliability - with the L072RZT6TR specifically engineered for USB-connected, sensor-rich edge nodes operating across wide temperature ranges.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L072RZT6TR operates at up to 32 MHz with 0.95 DMIPS/MHz performance. At 32 MHz and 3.3 V, typical Run mode current is 93 µA/MHz (≈2.98 mA total), measured with code executing from Flash and peripherals idle - verified per DS10689 Rev 5 Table 30.
Does this MCU support hardware encryption or secure boot features?
The STM32L072RZT6TR includes a true RNG and memory firewall protection for secure firmware updates, but lacks dedicated AES/SHA accelerators or ROM-based secure boot. Secure boot must be implemented in software using the RNG and protected Flash sectors - confirmed in Section 3.20 and RM0377 Reference Manual.
Can the USB interface operate without an external crystal, and what are the timing constraints?
Yes - the HSI48 oscillator is self-calibrated using the USB SOF packet to maintain ±0.25% accuracy, eliminating need for external crystal. This meets USB full-speed (12 Mbps) timing requirements per USB-IF compliance tests documented in AN4879 and DS10689 Section 3.17.5.
How many I/O pins support capacitive touch sensing, and what layout guidelines apply?
24 GPIOs are designated for TSC use (PA0–PA7, PB0–PB2, PC0–PC7, PD0–PD7, PE0–PE3, PH0–PH1), as listed in Table 9 of DS10689. Layout requires guard rings, minimized trace length (<10 cm), and separation from noisy signals - detailed in AN4998 section 4.2 for >100:1 SNR.
STM32L072RZT6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-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:
- 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:
STM32L072RZT6TR FAQ
1.How can I place an order for STM32L072RZT6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L072RZT6TR 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 STM32L072RZT6TR reliable?
The price and inventory of STM32L072RZT6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L072RZT6TR is usually 5 days.
3.What payment methods are accepted for STM32L072RZT6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L072RZT6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L072RZT6TR?
STM32L072RZT6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L072RZT6TR 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 STM32L072RZT6TR?
For technical support, including STM32L072RZT6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L072RZT6TR requirements.
6.How does Aetrix verify that STM32L072RZT6TR is sourced from the original manufacturer or authorized distributors?
All STM32L072RZT6TR 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 STM32L072RZT6TR meets industry standards.
7.What is the process for return or replacement of STM32L072RZT6TR?
All STM32L072RZT6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L072RZT6TR, 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 STM32L072RZT6TR part is unused and in its original packaging.
Return procedure for STM32L072RZT6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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