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STMicroelectronics STM32L072RBI6TR
- Part No.:
- STM32L072RBI6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA
- Datasheet:
-
STM32L072RBI6TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,961
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Product details
Overview
STM32L072RBI6TR 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, 16 channels), and ultra-low-power comparators; deployed in battery-powered IoT sensor nodes requiring long-term operation on coin cells.
For engineers reviewing the STM32L072RBI6TR datasheet, STM32L072RBI6TR pinout, STM32L072RBI6TR application, or STM32L072RBI6TR equivalent, key selection criteria include standby current (0.29 µA), RTC + RAM retention in Stop mode (0.86 µA), USB crystal-less timing accuracy, 5V-tolerant I/O count (78 pins), and embedded true RNG for secure firmware updates.
Technical Context
The device implements a dual-bank Flash architecture with read-while-write capability and hardware ECC, enabling safe over-the-air (OTA) firmware updates without halting execution. 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 across temperature and voltage variations.
Low-power operation is enforced via five distinct modes: Run (93 µA/MHz), Low-power Run, Sleep, Stop (0.43 µA), and Standby (0.29 µA), each with configurable wakeup sources including up to 16 EXTI lines and 3 dedicated standby pins. The 16-bit ultra-low-power timer (LPTIM) operates independently of main clock domains for sub-millisecond event timing during deep sleep.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ @ up to 32 MHz; 0.95 DMIPS/MHz performance with MPU for memory protection in safety-critical tasks. |
| Memory | 192 KB Flash (dual-bank, ECC, RWW), 20 KB SRAM, 6 KB EEPROM (ECC), 20-byte backup registers - supports robust data logging and firmware rollback. |
| Power Consumption | 0.29 µA Standby (3 wakeup pins), 0.86 µA Stop + RTC + 20 KB RAM retention - enables >10-year coin-cell lifetime in periodic-sensing applications. |
| Analog Peripherals | 12-bit ADC (1.14 Msps, 16 channels, down to 1.65 V), 2×12-bit DACs with buffers (down to 1.8 V), 2 ultra-low-power comparators - suitable for precision sensor signal conditioning. |
| Connectivity | USB 2.0 crystal-less interface with battery charging detection, 4×USART (2 ISO 7816/IrDA), 6×SPI (16 Mbit/s), 3×I2C (2 SMBus/PMBus) - enables mixed wired/wireless gateway functionality. |
| I/O & Timing | 78 I/Os (5V tolerant), 11 timers including LPTIM, RTC, SysTick, and watchdogs; 96-bit unique ID and true RNG - supports secure device identity and anti-cloning. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 64-pin quad flat lead frame; RoHS-compliant, ECOPACK2 certified; thermal pad exposed on underside for enhanced heat dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply | 1.65–3.6 V input; powers core, memories, and most peripherals; requires local 100 nF decoupling per VDD pin. |
| VSS | Ground reference | Digital ground return; multiple pins ensure low-impedance path for high-frequency switching noise suppression. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion; supports programmable reset threshold. |
| PA0–PA15 | General-purpose I/O bank A | Up to 15 pins support alternate functions including USART2_TX, ADC1_IN0, TIM2_CH1, and TSC_G1_IO1 - configurable for capacitive touch sensing. |
| PC13–PC15 | Low-power oscillator & RTC pins | PC14/PC15 accept 32.768 kHz crystal for RTC; PC13 is dedicated RTC output (RTC_OUT) - critical for calendar/timekeeping accuracy. |
| PA11/PA12 | USB D+/D− | Differential USB 2.0 interface; crystal-less operation enabled by internal 48 MHz HSI48 with ±0.25% accuracy - eliminates external crystal cost and board space. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby mode | 0.29 µA with 3 wakeup pins active - extends battery life in infrequent-event monitoring (e.g., smoke detectors, water leak sensors). |
| Crystal-less USB 2.0 | Internal 48 MHz HSI48 calibrated to ±0.25% - removes external crystal and matching capacitors, reducing BOM cost and layout complexity. |
| Embedded EEPROM with ECC | 6 KB data EEPROM with error correction - ensures reliable parameter storage (e.g., calibration coefficients, device settings) over 100k write cycles and 20-year retention. |
| Capacitive touch sensing controller (TSC) | 24-channel TSC supporting touchkey, linear, and rotary sensors - enables intuitive HMI in medical wearables and smart home controls without external ICs. |
| True random number generator (RNG) | FIPS-compliant entropy source feeding cryptographic libraries - required for TLS handshake, secure boot, and firmware signature verification. |
Applications
| Smart Utility Metering | Portable Medical Device |
|---|---|
|
Use Scenario: Battery-powered gas/water meter reading data every 15 minutes, transmitting via NB-IoT or LoRaWAN. IC Role / Device Role: Main system controller managing sensor acquisition (pressure/flow), RTC-based timestamping, secure OTA update handling, and low-power radio interfacing. Use Value: 0.86 µA Stop mode + RTC + full RAM retention enables deterministic wakeups and rapid sensor sampling without reloading context - minimizing active time and extending 10-year battery life. |
Use Scenario: Wearable ECG patch acquiring analog biopotential signals, performing real-time QRS detection, and storing encrypted waveform snippets. IC Role / Device Role: Signal acquisition hub integrating 12-bit ADC (1.14 Msps), dual DACs (for reference generation), ultra-low-power comparators (for threshold-triggered alerts), and AES encryption acceleration. Use Value: On-chip 12-bit ADC operating down to 1.65 V and DACs down to 1.8 V allow direct interfacing with low-noise analog front-ends - eliminating external level-shifting and reducing component count. |
| Industrial Wireless Sensor Node | Secure Access Control Terminal |
|
Use Scenario: Vibration/temperature node in predictive maintenance system, sampling at 1 kHz, compressing data locally, and transmitting hourly via BLE or Zigbee. IC Role / Device Role: Edge processing unit executing FFT-based spectral analysis, managing multi-sensor synchronization via LPTIM, and securing communications with true RNG-derived keys. Use Value: 11 timers including LPTIM and RTC enable precise multi-sensor timestamp alignment and sub-millisecond event scheduling - critical for phase-coherent vibration analysis. |
Use Scenario: Contactless smart card reader terminal validating credentials, logging access events, and enforcing tamper-detection policies. IC Role / Device Role: Secure transaction processor with ISO 7816 UART support, firewall-protected memory regions, 96-bit unique ID, and hardware-accelerated CRC for integrity checks. Use Value: Dual USARTs with ISO 7816 compliance and embedded firewall allow concurrent smart card communication and secure host interface - meeting EMV and Common Criteria 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 LCD controller (4x40 segment) and extra 2 KB SRAM - no change to Flash/ECC or low-power specs. | Required only when driving segmented LCD displays (e.g., industrial panel meters); unnecessary overhead for non-LCD designs. | Select STM32L073RBT6 only if integrated LCD driver is needed; otherwise, STM32L072RBI6TR offers identical core/peripheral performance at lower cost. |
| STM32L432KCU6 | Cortex-M4F core (100 MHz), FPU, 256 KB Flash, but higher active current (81 µA/MHz vs 93 µA/MHz at 32 MHz); no EEPROM, different package (UFQFPN32). | Better for floating-point math (e.g., motor control algorithms), but lacks EEPROM and has fewer I/Os (25 vs 78) - unsuitable for complex peripheral interfacing. | Choose STM32L432KCU6 only when DSP-intensive computation outweighs EEPROM dependency and I/O count; STM32L072RBI6TR remains optimal for EEPROM-reliant, I/O-rich, ultra-low-quiescent designs. |
Compared with STM32L072RBI6TR, STM32L073RBT6 adds LCD capability without trade-offs in power or memory ECC, while STM32L432KCU6 trades EEPROM and I/O density for floating-point performance - making the L072 the definitive choice for cost-sensitive, EEPROM-dependent, battery-operated sensor endpoints.
Availability
STM32L072RBI6TR is available at Aetrix Electronics and suitable for battery-powered IoT sensor nodes, portable medical monitors, and industrial wireless sensor networks requiring stable component supply and long-term lifecycle assurance.
Supply support for STM32L072RBI6TR 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 management ICs, MEMS, and automotive semiconductors since 1987.
This part belongs to the STM32L0 ultra-low-power MCU product line, engineered specifically for energy-constrained applications such as coin-cell-powered sensors, wearable health devices, and smart utility infrastructure where sub-µA standby and integrated analog peripherals are mandatory.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L072RBI6TR operates at up to 32 MHz with a typical current draw of 93 µA/MHz when executing code from Flash memory. At full speed (32 MHz), total active current is approximately 2.98 mA under standard conditions (3.3 V, 25 °C), verified per DS10689 Rev 5 Table 30. This value scales linearly with clock frequency and voltage.
Does this MCU support USB device functionality without an external crystal?
Yes - the STM32L072RBI6TR integrates a self-calibrating 48 MHz HSI48 RC oscillator with ±0.25% accuracy over temperature and voltage, enabling full USB 2.0 device operation (including enumeration and data transfer) without any external crystal or timing components, as confirmed in Section 3.17.5 of the datasheet.
How many I/O pins are 5V tolerant, and which banks support this feature?
78 of the 84 fast I/Os are 5V tolerant, covering GPIO ports A, B, C, D, E, and H as specified in Table 2 of DS10689 Rev 5. This tolerance applies across the full operating voltage range (1.65–3.6 V) and allows direct interfacing with legacy 5V logic without level shifters - critical for industrial control and mixed-voltage systems.
What is the endurance and data retention specification for the embedded EEPROM?
The 6 KB embedded EEPROM supports 100,000 write/erase cycles and guarantees 20 years of data retention at 55 °C (or 40 years at 25 °C), with built-in ECC for single-bit error correction and double-bit error detection, per DS10689 Rev 5 Table 54 - ensuring reliability in field-deployed firmware configuration storage.
STM32L072RBI6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-UFBGA
- 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):
- 1.8V ~ 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:
STM32L072RBI6TR FAQ
1.How can I place an order for STM32L072RBI6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L072RBI6TR 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 STM32L072RBI6TR reliable?
The price and inventory of STM32L072RBI6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L072RBI6TR is usually 5 days.
3.What payment methods are accepted for STM32L072RBI6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L072RBI6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L072RBI6TR?
STM32L072RBI6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L072RBI6TR 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 STM32L072RBI6TR?
For technical support, including STM32L072RBI6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L072RBI6TR requirements.
6.How does Aetrix verify that STM32L072RBI6TR is sourced from the original manufacturer or authorized distributors?
All STM32L072RBI6TR 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 STM32L072RBI6TR meets industry standards.
7.What is the process for return or replacement of STM32L072RBI6TR?
All STM32L072RBI6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L072RBI6TR, 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 STM32L072RBI6TR part is unused and in its original packaging.
Return procedure for STM32L072RBI6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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