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STMicroelectronics STM32L072CBY6TR
- Part No.:
- STM32L072CBY6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 49-UFBGA, WLCSP
- Datasheet:
-
STM32L072CBY6TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 49WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,947
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Product details
Overview
STM32L072CBY6TR 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-term operation on coin-cell power.
For engineers reviewing the STM32L072CBY6TR datasheet, STM32L072CBY6TR pinout, STM32L072CBY6TR application, or STM32L072CBY6TR equivalent, key selection criteria include standby current (0.29 µA), RTC + RAM retention in Stop mode (0.86 µA), USB crystal-less capability, 5V-tolerant I/O count (78 pins), and embedded true RNG for secure firmware updates.
Technical Context
The STM32L072CBY6TR implements a single-core Arm Cortex-M0+ with MPU, operating from 32 kHz to 32 MHz, delivering 0.95 DMIPS/MHz; its clock system integrates factory-trimmed 16 MHz HSI, self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE for RTC with calibration support.
Power architecture includes five low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby), with BOR thresholds selectable across five levels, programmable PVD, and dynamic voltage scaling enabling optimized energy-per-instruction across voltage ranges (1.65–3.6 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ @ up to 32 MHz; enables deterministic real-time control with MPU for memory protection in safety-aware firmware. |
| Memory | 192 KB Flash (dual-bank, read-while-write, ECC); supports live firmware updates without halting execution. |
| RAM / EEPROM | 20 KB SRAM + 6 KB data EEPROM (ECC-protected); retains critical calibration or state data across power cycles without external NV memory. |
| Low-Power Performance | 0.29 µA Standby (3 wakeup pins); extends 10-year battery life in sealed environmental sensors using CR2032 cells. |
| Analog Peripherals | 12-bit ADC (1.14 Msps, 16 channels), 2×12-bit DACs with buffers, 2 ultra-low-power comparators; enables local signal conditioning and closed-loop analog control without external ICs. |
| USB Interface | Crystal-less USB 2.0 FS with battery charging detection; eliminates external crystal and reduces BOM cost/PCB area in portable medical or wearable devices. |
| I/O Capability | 78 I/Os (5V tolerant), 24 capacitive sensing channels; supports direct connection to industrial buttons, sliders, and rotary encoders without level shifters. |
Pinout & Package
STM32L072CBY6TR uses a WLCSP49 (3.294 × 3.258 mm) package with 49-ball array, optimized for space-constrained wearables and implantable-grade modules. Pin functions are validated per ST's DS10689 Rev 5, Table 16 ("STM32L072xxx pin definition") and Table 15 ("Legend/abbreviations used in the pinout table").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.65–3.6 V) | Supplies core and I/O domains; supports single-supply operation across full industrial temperature range (−40 to +125 °C). |
| VSS | Digital ground reference | Provides return path for all digital logic; separate analog ground (VSSA) available for noise-sensitive ADC/DAC operation. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15, PH0–PH1 | General-purpose I/Os | 78 pins support 5V tolerance, multiple alternate functions (USART, SPI, I2C, USB, timers), and capacitive touch sensing. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external push-button or supervisor IC reset signals. |
| BOOT0 | Boot mode selection | Configures boot source (system memory, Flash, or SRAM); required for UART/USB bootloader entry during firmware recovery. |
| USB_DP / USB_DM | USB 2.0 Full-Speed differential pair | Crystal-less interface with integrated transceivers and battery charging detection (BCD); no external PHY or oscillator needed. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode + RTC + 20-KB RAM retention | 0.86 µA - preserves full context and real-time clock while enabling sub-second wake-up for periodic sensor sampling. |
| Embedded true random number generator (RNG) | FIPS-compliant entropy source - enables secure key generation for TLS handshakes and firmware signature verification. |
| Firewall protection unit | Hardware-enforced code/data isolation - prevents unauthorized access to secure boot loader or cryptographic keys in tamper-resistant applications. |
| Pre-programmed system memory bootloader | Supports USB and USART (ISO 7816, IrDA) - allows field firmware updates without JTAG/SWD debug hardware. |
| Self-calibrating 48 MHz RC oscillator (HSI48) | ±0.25% accuracy over temperature - meets USB Full-Speed timing requirements without external crystal, reducing component count by one. |
Applications
| Smart Utility Metering | Portable Medical Device |
|---|---|
Use Scenario: Battery-powered water/gas meter with hourly pressure/flow readings, encrypted transmission via NB-IoT. IC Role / Device Role / Timing Role: Main controller executing metering algorithm, managing RTC-coupled sampling, and driving secure USB/UART bootloader for regulatory firmware patches. Use Value: 0.29 µA Standby current enables >15-year CR123A battery life; embedded ECC Flash prevents corruption during power-loss events during OTA updates. | Use Scenario: Handheld ECG monitor with analog front-end, Bluetooth LE telemetry, and rechargeable Li-ion battery. IC Role / Device Role / Timing Role: Signal acquisition hub-synchronizing 12-bit ADC sampling, buffering waveform data in SRAM, and generating precise DAC reference for lead-off detection. Use Value: Dual 12-bit DACs with output buffers enable accurate electrode biasing down to 1.8 V; 5 µs Flash wakeup ensures responsive UI response after sleep. |
| Industrial Predictive Maintenance Sensor | Asset Tracking Beacon |
Use Scenario: Vibration/temperature node on rotating machinery, transmitting FFT features via LoRaWAN every 10 minutes. IC Role / Device Role / Timing Role: Edge processing unit running lightweight ML inference (TinyML), managing accelerometer interface via SPI, and controlling ultra-low-power comparators for event-triggered wake-up. Use Value: 24 capacitive sensing channels repurposed as GPIO-interrupt inputs for MEMS sensor alerts; Stop mode current (0.43 µA) minimizes quiescent drain between transmissions. | Use Scenario: GPS-enabled logistics tag reporting location every 4 hours using GNSS + cellular assist; powered by primary lithium thionyl chloride cell. IC Role / Device Role / Timing Role: Power manager and communication orchestrator-controlling GPS module enable/disable, managing USB-based configuration, and enforcing secure boot before payload execution. Use Value: Embedded 6 KB EEPROM stores IMEI, carrier profiles, and last-known coordinates across 100k write cycles; true RNG seeds BLE pairing keys to prevent replay attacks. |
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 | LQFP64 package (64-pin), 192 KB Flash, identical peripherals but lacks USB crystal-less support; requires external 48 MHz clock source for USB. | Suitable for wired industrial controllers where USB is optional and PCB space permits larger package. | Select when USB is unused or external crystal acceptable; avoid if miniaturization or crystal-less USB is mandatory. |
| STM32L432KCU6 | Cortex-M4F core, 256 KB Flash, 64 KB SRAM, no EEPROM; higher performance (100 MHz), but higher active current (81 µA/MHz vs 93 µA/MHz at 32 MHz). | Better for edge AI inference or audio processing; unsuitable for EEPROM-dependent calibration storage or strict <1 µA standby budgets. | Choose only if floating-point math or DSP acceleration is required; not drop-in for EEPROM or ultra-low-power RTC retention use cases. |
Compared with STM32L072CBY6TR, STM32L073RBT6 trades USB integration for larger footprint and higher pin count, while STM32L432KCU6 delivers computational headroom at the expense of standby power and non-volatile data retention architecture - making the CBY6TR uniquely balanced for compact, long-life, EEPROM-reliant sensor endpoints.
Availability
STM32L072CBY6TR is available at Aetrix Electronics and suitable for smart utility metering, portable medical devices, industrial predictive maintenance sensors, and asset tracking beacons requiring stable component supply across extended product lifecycles.
Supply support for STM32L072CBY6TR 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 automotive semiconductors since 1987.
The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, robust security, and rich analog integration - specifically engineered for IoT edge nodes, wearables, and energy-harvesting systems.
FAQ
What is the maximum operating temperature for STM32L072CBY6TR?
The STM32L072CBY6TR is rated for operation from −40 °C to +125 °C, validated per DS10689 Rev 5 Section 6.3.1. This extended industrial temperature range enables deployment in under-hood automotive sensors, industrial motor drives, and outdoor utility infrastructure without thermal derating.
Does STM32L072CBY6TR support hardware encryption accelerators?
No - the STM32L072CBY6TR does not integrate AES, DES, or SHA hardware accelerators. It relies on software libraries (e.g., Mbed TLS) executed on the Cortex-M0+ core. Security is enforced via firewall protection, true RNG, and secure bootloader; for hardware crypto, consider STM32L4x or STM32U5 series.
Can the 6 KB EEPROM be used for storing calibration coefficients?
Yes - the 6 KB data EEPROM is designed for frequent write/erase cycles (100k endurance, 40-year data retention at 55 °C per DS10689 Section 6.3.54) and supports byte-level writes. It is commonly used to store sensor offset/gain values, battery aging parameters, and device-specific tuning constants in field-deployed equipment.
Is SWD debugging supported on the WLCSP49 package?
Yes - Serial Wire Debug (SW-DP) is fully supported via dedicated SWCLK and SWDIO pins (PA14 and PA13), confirmed in DS10689 Section 3.20 and Table 16. The WLCSP49 layout accommodates micro-probe access or soldered debug headers; no additional debug bridge IC is required.
STM32L072CBY6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 49-UFBGA, WLCSP
- 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:
- 37
- 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 10x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L072CBY6TR FAQ
1.How can I place an order for STM32L072CBY6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L072CBY6TR 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 STM32L072CBY6TR reliable?
The price and inventory of STM32L072CBY6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L072CBY6TR is usually 5 days.
3.What payment methods are accepted for STM32L072CBY6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L072CBY6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L072CBY6TR?
STM32L072CBY6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L072CBY6TR 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 STM32L072CBY6TR?
For technical support, including STM32L072CBY6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L072CBY6TR requirements.
6.How does Aetrix verify that STM32L072CBY6TR is sourced from the original manufacturer or authorized distributors?
All STM32L072CBY6TR 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 STM32L072CBY6TR meets industry standards.
7.What is the process for return or replacement of STM32L072CBY6TR?
All STM32L072CBY6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L072CBY6TR, 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 STM32L072CBY6TR part is unused and in its original packaging.
Return procedure for STM32L072CBY6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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