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STMicroelectronics STM32L072RBT6TR
- Part No.:
- STM32L072RBT6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L072RBT6TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,083
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Product details
Overview
STM32L072RBT6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 192 KB Flash, 20 KB SRAM, and 6 KB EEPROM; features USB 2.0 (crystal-less), dual 12-bit DACs, 12-bit ADC (1.14 Msps), and operates from 1.65–3.6 V across –40 to +125 °C. It targets battery-powered IoT sensors and portable medical devices requiring long runtime and analog signal conditioning.
For engineers reviewing the STM32L072RBT6TR datasheet, STM32L072RBT6TR pinout, STM32L072RBT6TR application, or STM32L072RBT6TR equivalent, key selection criteria include ultra-low-power Stop mode current (0.43 µA), 5 µs Flash wakeup time, USB crystal-less operation, and 78 I/Os with 5V tolerance - critical for energy-constrained embedded designs with mixed-signal interfaces.
Technical Context
The STM32L072RBT6TR integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby). Its clock system includes factory-trimmed 16 MHz HSI, 48 MHz HSI48 (self-calibrated for USB), 32 kHz LSE for RTC, and PLL for CPU clock scaling up to 32 MHz.
Analog subsystem comprises two independent 12-bit DACs with output buffers (operable down to 1.8 V), a 12-bit ADC with 16 channels and 1.14 Msps sampling rate (down to 1.65 V), and two ultra-low-power comparators with window mode and wake-up capability - all designed for precision sensing in sub-1 µA standby systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32 MHz max, 0.95 DMIPS/MHz - enables real-time control with minimal power overhead |
| Memory | 192 KB Flash (ECC, read-while-write), 20 KB SRAM, 6 KB EEPROM (ECC) - supports firmware updates and data logging without external 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 - enables closed-loop sensor signal chain on single chip |
| USB Interface | USB 2.0 full-speed, crystal-less, battery charging detection - eliminates external crystal and simplifies BOM for portable USB peripherals |
| I/O Capability | 78 I/Os (5V tolerant), 24 capacitive sensing channels - supports direct connection to industrial sensors and touch UI without level shifters |
| Timers & DMA | 11 timers (including RTC, LPTIM, watchdogs), 7-channel DMA - handles timing-critical tasks (e.g., PWM, ADC triggers) with CPU offload |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for thermal dissipation in compact PCB layouts and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains support separate analog/digital regulation; VDDA must be ≥ VDD for ADC/DAC accuracy |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PH0–PH1 | General-purpose I/Os | 78 pins support 5V-tolerant digital I/O, alternate functions (USART, SPI, I2C, USB, timers), and capacitive sensing |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB2, PB10, PB11, PC0–PC7, PD2 | ADC input channels | 16-channel 12-bit ADC accepts inputs from 1.65 V min; internal VREFINT enables ratiometric measurements |
| PA4, PA5 | DAC outputs | Two buffered 12-bit DACs operate down to 1.8 V supply; each supports continuous or trigger-based waveform generation |
| PA11, PA12 | USB D+/D− | Crystal-less USB 2.0 interface with integrated transceivers and battery charging detection logic |
| PC13, PC14, PC15 | RTC oscillator pins | Support 32.768 kHz external crystal for precise real-time clock with calibration capability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode | 0.43 µA with 16 wakeup lines - enables multi-year battery life in periodic wake-up sensor nodes |
| Crystal-less USB | 48 MHz HSI48 self-calibrated against USB SOF - removes external crystal and matching components, reducing BOM cost and board area |
| Embedded EEPROM | 6 KB with ECC - stores calibration data, device IDs, or configuration parameters with guaranteed 100k write cycles and 20-year retention |
| Capacitive sensing controller | 24-channel TSC supporting touchkey, linear, and rotary sensors - enables intuitive user interfaces without external ICs |
| True random number generator | Dedicated TRNG compliant with NIST SP800-90B - provides entropy source for secure boot and cryptographic key generation |
Applications
| Smart Utility Meter | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-operated gas/water meter reading data every 15 minutes and transmitting via NB-IoT. IC Role / Device Role / Timing Role: Main MCU managing sensor acquisition (pressure/flow), RTC-triggered wake-up, USB firmware update, and low-power communication stack. Use Value: 0.43 µA Stop mode and 5 µs Flash wakeup minimize active time; integrated EEPROM stores meter calibration and tamper logs securely. | Use Scenario: Continuous ECG and temperature monitoring in a wrist-worn patch with weekly USB charging. IC Role / Device Role / Timing Role: Signal acquisition hub processing analog biosignals via ADC/DAC, driving OLED display, and managing USB battery charging detection. Use Value: Dual 12-bit DACs generate reference waveforms for analog front-end; crystal-less USB enables seamless charging and firmware updates without extra components. |
| Industrial Wireless Sensor Node | Portable Diagnostic Device |
Use Scenario: LoRaWAN node measuring vibration, temperature, and humidity in factory equipment with 2-year battery life. IC Role / Device Role / Timing Role: Sensor fusion processor aggregating data from multiple analog and digital sensors, performing edge preprocessing, and scheduling RF transmission. Use Value: 78 5V-tolerant I/Os interface directly with legacy industrial sensors; ultra-low-power comparators detect threshold breaches without waking CPU. | Use Scenario: Handheld blood glucose or pulse oximeter requiring FDA-grade accuracy and USB HID connectivity. IC Role / Device Role / Timing Role: Medical-grade analog signal conditioner and USB-HID endpoint with calibrated ADC/DAC paths and secure boot enforcement. Use Value: 12-bit ADC with 1.14 Msps supports high-resolution sampling of fast transient signals; TRNG and firewall protection meet IEC 62304 security requirements. |
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 |
|---|---|---|---|
| STM32L073RBT6 | Same package and pinout; adds CAN FD controller and higher-temp grade (–40 to +125 °C same), but no functional difference in USB/ADC/DAC specs | Required where CAN bus integration is needed for industrial fieldbus connectivity | Select when CAN FD is mandatory; otherwise identical migration path with no layout change |
| STM32L432KCU6 | Cortex-M4F core, 2x higher performance (80 MHz), FPU, larger Flash (256 KB), but higher active current (115 µA/MHz vs 93 µA/MHz) | Suitable for applications needing floating-point math (e.g., FFT-based vibration analysis) at cost of reduced battery life | Choose for compute-intensive edge analytics; avoid if sub-µA standby and USB crystal-less are primary constraints |
Compared with STM32L072RBT6TR, STM32L073RBT6 offers identical low-power analog integration plus CAN FD for industrial networks, while STM32L432KCU6 trades ultra-low-power efficiency for Cortex-M4F compute headroom - making the L072 optimal for battery-limited USB-connected sensor endpoints.
Availability
STM32L072RBT6TR is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial wireless sensor nodes, and portable diagnostic devices requiring stable component supply and long-term manufacturability.
Supply support for STM32L072RBT6TR 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 management ICs, sensors, and analog products for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications, emphasizing sub-µA standby operation, integrated analog peripherals, and energy-efficient connectivity - specifically engineered for battery-powered IoT endpoints and portable medical devices.
FAQ
What is the maximum operating frequency and core type of the STM32L072RBT6TR?
The STM32L072RBT6TR features an Arm Cortex-M0+ core with a maximum CPU frequency of 32 MHz, delivering 0.95 DMIPS/MHz. It supports dynamic voltage scaling to optimize performance versus power consumption, and its clock tree includes multiple internal oscillators (HSI16, HSI48, LSI, MSI) and external crystal options (HSE up to 25 MHz, LSE 32.768 kHz).
Does the STM32L072RBT6TR support USB without an external crystal?
Yes - it integrates a 48 MHz HSI48 oscillator with automatic self-calibration against the USB Start-of-Frame (SOF) token, enabling full-speed USB 2.0 communication without an external crystal. This reduces bill-of-materials cost and PCB footprint while maintaining ±0.25% frequency accuracy required for USB compliance.
How many I/O pins are 5V tolerant, and what is the total I/O count?
The STM32L072RBT6TR provides 78 I/O pins, of which 78 are 5V tolerant. This allows direct interfacing with legacy 5V logic, industrial sensors, and actuators without level-shifting circuitry - a key advantage in mixed-voltage industrial and instrumentation designs.
What is the endurance and retention specification for the embedded EEPROM?
The integrated 6 KB data EEPROM supports 100,000 write/erase cycles and guarantees data retention for 20 years at 85 °C (or 40 years at 25 °C), with built-in ECC for error detection and correction. This eliminates need for external serial EEPROM in applications requiring frequent nonvolatile parameter storage.
STM32L072RBT6TR 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:
- 128KB (128K 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 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L072RBT6TR FAQ
1.How can I place an order for STM32L072RBT6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L072RBT6TR 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 STM32L072RBT6TR reliable?
The price and inventory of STM32L072RBT6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L072RBT6TR is usually 5 days.
3.What payment methods are accepted for STM32L072RBT6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L072RBT6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L072RBT6TR?
STM32L072RBT6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L072RBT6TR 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 STM32L072RBT6TR?
For technical support, including STM32L072RBT6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L072RBT6TR requirements.
6.How does Aetrix verify that STM32L072RBT6TR is sourced from the original manufacturer or authorized distributors?
All STM32L072RBT6TR 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 STM32L072RBT6TR meets industry standards.
7.What is the process for return or replacement of STM32L072RBT6TR?
All STM32L072RBT6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L072RBT6TR, 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 STM32L072RBT6TR part is unused and in its original packaging.
Return procedure for STM32L072RBT6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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