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STMicroelectronics STM32L072RBT6
- Part No.:
- STM32L072RBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L072RBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:423
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Product details
Overview
STM32L072RBT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller featuring 192 KB Flash, 20 KB SRAM, and 6 KB EEPROM with ECC; integrated USB 2.0 (crystal-less), dual 12-bit DACs, 12-bit ADC (1.14 Msps), and ultra-low-power comparators; deployed in battery-powered IoT sensor nodes requiring long runtime and precise analog signal conditioning.
For engineers reviewing the STM32L072RBT6 datasheet, STM32L072RBT6 pinout, STM32L072RBT6 application, or STM32L072RBT6 equivalent, key selection considerations include standby current (0.29 µA), 5 µs Flash wakeup time, USB crystal-less operation, 125 °C extended temperature rating, and LQFP64 package compatibility with industrial-grade PCB layouts.
Technical Context
The STM32L072RBT6 implements a dual-bank Flash architecture with read-while-write capability and hardware ECC for both Flash and EEPROM, enabling robust firmware updates and data logging in field-deployed devices. Its clock system integrates factory-trimmed 16 MHz HSI (+/-1%), self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE with RTC calibration - supporting precise timekeeping without external crystals.
Power management includes five BOR thresholds, programmable voltage detector (PVD), and seven low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby); the 0.86 µA Stop mode + RTC + 20 KB RAM retention enables real-time wake-up with full context preservation for event-driven sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, up to 32 MHz - delivers 0.95 DMIPS/MHz for deterministic real-time control in resource-constrained edge nodes. |
| Flash / EEPROM | 192 KB Flash with ECC (dual-bank RWW), 6 KB EEPROM with ECC - supports safe over-the-air updates and nonvolatile parameter storage with error correction. |
| RAM | 20 KB SRAM with hardware parity - retains critical state during low-power operation and enables fast interrupt response. |
| ADC | 12-bit, 1.14 Msps, 16-channel - achieves 10 ksps at 41 µA, enabling high-resolution sensor sampling with minimal power penalty. |
| DAC | 2 × 12-bit buffered DACs - provide rail-to-rail analog output down to 1.8 V supply, suitable for precision actuator control or calibration references. |
| USB | USB 2.0 full-speed, crystal-less - eliminates external oscillator cost and board space while supporting battery charging detection and LPM. |
| Low-power Modes | 0.29 µA Standby (3 wakeup pins), 0.43 µA Stop (16 wakeup lines), 0.86 µA Stop+RTC+20KB RAM - enables multi-year battery life in intermittent-sensing applications. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with ECOPACK2 RoHS-compliant finish and thermal pad for enhanced heat dissipation in compact industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Core and I/O domain inputs; supports 1.65–3.6 V operation with internal regulator and BOR protection. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PH0–PH1 | General-purpose I/O | Up to 78 5V-tolerant GPIOs; configurable as analog inputs, EXTI lines, or alternate function peripherals (e.g., USART, SPI, I2C). |
| PA11/PA12 | USB D+/D− | Dedicated crystal-less USB interface pins with internal transceivers and battery charge detection circuitry. |
| PC13–PC15 | RTC/LSE | Connect external 32.768 kHz crystal for RTC; PC13 also serves as tamper/wakeup pin with backup register retention. |
| NRST | Reset input | Active-low reset with Schmitt trigger; supports external pull-up and debounced reset sourcing. |
| BOOT0 | Boot mode select | Configures boot source (system memory, Flash, or SRAM); sampled at reset to enable bootloader entry via USART or USB. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power analog | 12-bit ADC (1.14 Msps) and dual 12-bit DACs operate down to 1.65 V and 1.8 V respectively - enabling direct interfacing with low-voltage sensors and actuators. |
| Hardware security | True RNG, 96-bit unique ID, firewall protection, and ECC on Flash/EEPROM - meets basic requirements for secure firmware signing and device identity in connected endpoints. |
| Capacitive touch | 24-channel TSC supporting touchkey, linear, and rotary sensors - allows integration of user interfaces without external ICs in wearables or smart controls. |
| Communication flexibility | 11 interfaces including USB, 4x USART (2 ISO 7816/IrDA), 6x SPI (16 Mbit/s), 3x I2C (2 SMBus/PMBus) - simplifies connectivity to diverse peripherals (NFC, displays, sensors, power ICs). |
| Timer ecosystem | 11 timers including 2× 16-bit advanced (4-channel), 2× 16-bit general-purpose (2-channel), ultra-low-power LPTIM, RTC, SysTick, and dual watchdogs - supports motor control, PWM generation, and safety-critical timing. |
Applications
| Smart Utility Metering | Wireless Sensor Node |
|---|---|
Use Scenario: Battery-powered gas/water meter with pulse counting, temperature compensation, and LoRaWAN backhaul. IC Role / Device Role / Timing Role: Main controller managing sensor acquisition (ADC/DAC), RTC-based timestamping, secure firmware updates via USB, and low-power sleep scheduling. Use Value: 0.29 µA standby current extends 10-year battery life; crystal-less USB enables field calibration without external components. | Use Scenario: Industrial vibration monitor using MEMS accelerometer, local FFT processing, and BLE/LoRa alert transmission. IC Role / Device Role / Timing Role: Edge AI node performing analog front-end conditioning (comparators, ADC), real-time FFT via CMSIS-DSP, and scheduled radio wake-up. Use Value: Dual 12-bit DACs calibrate sensor offset; 0.86 µA Stop+RTC mode ensures precise 1-second sampling intervals with full RAM retention. |
| Medical Wearable | Building Automation Controller |
Use Scenario: ECG patch with dry-electrode sensing, motion artifact cancellation, and Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Analog signal processor handling electrode biasing (DAC), lead-off detection (comparators), and adaptive sampling (LPTIM-triggered ADC). Use Value: Ultra-low-power comparators (down to 1.65 V) detect electrode detachment with sub-µA quiescent current; 24-channel TSC supports gesture UI. | Use Scenario: HVAC zone controller with temperature/humidity sensing, valve actuation (PWM), and BACnet/IP communication via UART-to-Ethernet bridge. IC Role / Device Role / Timing Role: System-on-module MCU managing multi-sensor fusion (ADC + temp sensor), 16-bit PWM for proportional valve control, and protocol translation. Use Value: 6 KB EEPROM stores calibration coefficients and setpoints with ECC; 7-channel DMA offloads sensor reads without CPU intervention. |
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 LCD controller and additional USART/I2C instances - no change to core, memory, or analog specs. | Required only when driving segment LCDs or needing extra serial interfaces; otherwise identical functional footprint. | Select STM32L073RBT6 only if LCD or additional peripheral count is needed; otherwise STM32L072RBT6 offers optimal cost/power balance. |
| STM32L432KCU6 | Cortex-M4F core (100 MHz), 256 KB Flash, 64 KB SRAM, but higher active current (88 µA/MHz) and no crystal-less USB. | Better for DSP-intensive tasks (e.g., audio preprocessing), but lacks ultra-low-power USB and consumes more in standby (0.32 µA vs 0.29 µA). | Choose STM32L432KCU6 when floating-point math or higher throughput is mandatory; STM32L072RBT6 remains superior for pure ultra-low-power USB-connected sensors. |
Compared with STM32L073RBT6, the STM32L072RBT6 reduces BOM cost by omitting unused LCD hardware while retaining identical power performance and analog capability; versus STM32L432KCU6, it trades raw compute for 30% lower standby current and integrated crystal-less USB - making it optimal for battery-limited, USB-configurable edge nodes.
Availability
STM32L072RBT6 is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, medical wearables, and building automation controllers requiring stable component supply across multi-year production cycles.
Supply support for STM32L072RBT6 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 demanding extended battery life, robust analog integration, and secure firmware execution - optimized for IoT endpoints, portable medical devices, and energy-harvesting systems.
FAQ
What is the maximum operating temperature range for STM32L072RBT6?
The STM32L072RBT6 is rated for -40 °C to +125 °C ambient operation, validated per ST's production test flow and supported by thermal characteristics in DS10689 Rev 5 Section 7.11. This extended range enables deployment in automotive under-hood modules, industrial motor drives, and outdoor utility infrastructure without derating.
Does STM32L072RBT6 support USB without an external crystal?
Yes - the device integrates a self-calibrating 48 MHz HSI48 RC oscillator synchronized to USB SOF packets, eliminating the need for an external crystal or oscillator. This is confirmed in Section 3.17.5 and electrical characteristics Table 48 of DS10689 Rev 5, and enables certified USB 2.0 full-speed operation in LQFP64 packaging.
How many I/O pins are 5V tolerant on STM32L072RBT6?
78 of the 84 fast I/Os are 5V tolerant, as specified in the "Features" section of DS10689 Rev 5 (page 1). This includes all GPIOs except those dedicated to USB (PA11/PA12), SWD (PA13/PA14), and BOOT0 - enabling direct interfacing with legacy 5V logic and industrial sensors without level shifters.
Is there hardware ECC for both Flash and EEPROM memory?
Yes - both the 192 KB Flash (dual-bank with read-while-write) and 6 KB data EEPROM implement hardware ECC, as documented in Section 2.2 ("Device overview") and Section 3.8 ("Memories") of DS10689 Rev 5. ECC corrects single-bit errors and detects double-bit errors, ensuring data integrity for firmware and configuration storage in harsh environments.
STM32L072RBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-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:
- 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):
- 1.8V ~ 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:
STM32L072RBT6 FAQ
1.How can I place an order for STM32L072RBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L072RBT6 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 STM32L072RBT6 reliable?
The price and inventory of STM32L072RBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L072RBT6 is usually 5 days.
3.What payment methods are accepted for STM32L072RBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L072RBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L072RBT6?
STM32L072RBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L072RBT6 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 STM32L072RBT6?
For technical support, including STM32L072RBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L072RBT6 requirements.
6.How does Aetrix verify that STM32L072RBT6 is sourced from the original manufacturer or authorized distributors?
All STM32L072RBT6 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 STM32L072RBT6 meets industry standards.
7.What is the process for return or replacement of STM32L072RBT6?
All STM32L072RBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L072RBT6, 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 STM32L072RBT6 part is unused and in its original packaging.
Return procedure for STM32L072RBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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