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STMicroelectronics STM32L052R6T6
- Part No.:
- STM32L052R6T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L052R6T6.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,564
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Product details
Overview
STM32L052R6T6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller featuring 32 MHz max CPU frequency, 64 KB Flash with ECC, 8 KB SRAM, and 2 KB EEPROM. It integrates USB 2.0 (crystal-less), 12-bit ADC (1.14 Msps, 16 channels), 12-bit DAC, two ultra-low-power comparators, and capacitive touch sensing - deployed in battery-powered industrial sensors and portable medical devices.
For engineers reviewing the STM32L052R6T6 datasheet, STM32L052R6T6 pinout, STM32L052R6T6 application, or STM32L052R6T6 equivalent, key selection criteria include standby current (0.27 µA), RTC + RAM retention in Stop mode (0.8 µA), USB crystal-less operation, 51 fast I/Os (45 tolerant to 5 V), and integrated true RNG with firewall protection.
Technical Context
The STM32L052R6T6 implements a Cortex-M0+ core with Memory Protection Unit (MPU), supporting dynamic voltage scaling across three operating ranges (1.65–3.6 V) and enabling sub-µA low-power modes. Its clock system combines multiple internal oscillators - including factory-trimmed 16 MHz HSI (+/-1%), self-calibrating 48 MHz HSI48 for USB, and 37 kHz LSI - plus external crystal support (1–25 MHz HSE, 32 kHz LSE).
Analog subsystem integration includes a single 12-bit DAC with output buffer (operable down to 1.8 V), dual ultra-low-power comparators with window mode and wake-up capability (down to 1.65 V), and a 12-bit ADC with up to 16 channels and 1.14 Msps sampling rate - all independently functional in low-voltage operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+ with MPU, 32 MHz max - enables deterministic real-time control with memory isolation for firmware safety. |
| Flash / SRAM / EEPROM | 64 KB Flash (ECC), 8 KB SRAM, 2 KB EEPROM (ECC) - supports robust code/data storage and field firmware updates with error correction. |
| Low-Power Modes | 0.27 µA Standby (2 wakeup pins), 0.8 µA Stop + RTC + 8 KB RAM retention - extends battery life in intermittent-sensing applications. |
| ADC / DAC | 12-bit ADC (1.14 Msps, 16 ch), 12-bit DAC (1 ch, buffered, down to 1.8 V) - enables high-fidelity analog signal acquisition and precise actuator control. |
| USB Interface | USB 2.0 full-speed, crystal-less, with battery charging detection - eliminates external crystal cost and simplifies PCB layout for portable designs. |
| I/O Capability | 51 fast I/Os (45 tolerant to 5 V) - allows direct interfacing with legacy 5 V peripherals without level shifters. |
| Security & Uniqueness | 96-bit unique ID, true RNG, firewall protection - supports secure boot, device authentication, and cryptographic key generation. |
Pinout & Package
STM32L052R6T6 is housed in a 64-pin LQFP package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2 certified. Pin functions are validated per ST's DS10182 Rev 10 datasheet Section 4 (Pin descriptions) and Table 16 (pin definitions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation; decoupling required per datasheet layout guidelines. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD12, PH0–PH1 | General-purpose I/Os | 51 total GPIOs; 45 support 5 V tolerance - simplifies mixed-voltage system integration and reduces BOM count. |
| PA11/PA12 | USB D+/D− | Dedicated crystal-less USB interface - enables plug-and-play connectivity without external oscillator or ESD protection components. |
| PA0, PA1 | ADC1_IN0 / ADC1_IN1 | Analog input channels with 12-bit resolution and 1.14 Msps - suitable for precision sensor signal conditioning in compact form factors. |
| PA4 | DAC_OUT1 | Buffered 12-bit DAC output - drives resistive loads directly (e.g., biasing transducers or calibrating reference voltages) down to 1.8 V supply. |
| NRST | Active-low reset | Asynchronous reset pin with internal pull-up; accepts external push-button or supervisor IC assertion - ensures reliable power-on and fault recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 0.27 µA with two wakeup pins enabled - enables multi-year battery life in wireless sensor nodes with infrequent wakeups. |
| Crystal-less USB | Integrated 48 MHz HSI48 oscillator with self-calibration against USB SOF - removes external crystal and matching capacitors, reducing BOM and layout area by ~3 mm². |
| Capacitive touch controller | Up to 24 channels supporting touchkey, linear, and rotary sensors - enables intuitive HMI in space-constrained wearables without dedicated touch IC. |
| True random number generator | Dedicated hardware RNG compliant with NIST SP800-90B - provides entropy for TLS handshakes, secure key derivation, and anti-cloning features. |
| Embedded EEPROM | 2 KB data EEPROM with ECC and 100 k-cycle endurance - stores calibration data, device configuration, or usage logs with guaranteed integrity over product lifetime. |
Applications
| Smart Utility Meter | Portable ECG Monitor |
|---|---|
Use Scenario: Battery-operated gas/water meter reading data every 15 minutes, transmitting via NB-IoT or LoRaWAN. IC Role / Device Role / Timing Role: Main system controller managing sensor readout (pressure/flow), RTC-based scheduling, secure OTA updates, and low-power radio interface timing. Use Value: 0.27 µA standby current and 3.5 µs wakeup from RAM enable >10-year battery life; integrated AES acceleration (via RCC) secures firmware updates. | Use Scenario: Handheld, single-lead ECG device with real-time waveform display and Bluetooth LE transmission. IC Role / Device Role / Timing Role: Analog front-end controller acquiring conditioned ECG signals via ADC, performing baseline filtering in firmware, and synchronizing BLE packet timing. Use Value: 12-bit ADC with 1.14 Msps captures high-fidelity cardiac waveforms; 12-bit DAC generates precise reference voltages for op-amp biasing and calibration. |
| Industrial Temperature Sensor Node | Wireless Smoke Detector |
Use Scenario: DIN-rail mounted node measuring ambient temperature and humidity, reporting via RS-485 or wireless mesh network. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating I²C temperature/humidity data, executing compensation algorithms, and managing watchdog-triggered fail-safe alerts. Use Value: Dual ultra-low-power comparators monitor supply rail and sensor thresholds independently; 0.8 µA Stop+RTC mode maintains timekeeping while preserving 8 KB RAM for state retention. | Use Scenario: CE/FCC-certified battery-powered smoke detector with self-test, acoustic alarm, and cloud alert via cellular modem. IC Role / Device Role / Timing Role: Safety-critical controller validating photoelectric chamber readings, managing piezo buzzer timing, and enforcing mandatory 30-second alarm duration. Use Value: Independent and window watchdogs provide redundant failure detection; true RNG seeds alarm pattern jitter to meet EN 14604 immunity 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 |
|---|---|---|---|
| STM32L072RBT6 | 128 KB Flash, 20 KB SRAM, no USB, adds AES accelerator and additional timers | Better suited for complex firmware with encryption or extended peripheral orchestration; lacks crystal-less USB | Select when security (AES) and memory headroom outweigh USB requirement |
| STM32L053R8T6 | 64 KB Flash, 8 KB SRAM, adds LCD controller (4x40 segment), same USB/peripherals | Targeted at segment LCD displays (e.g., smart thermostats); identical low-power profile and pinout compatibility | Select only if integrated LCD driver is required; otherwise identical functionality and footprint |
Compared with STM32L052R6T6, STM32L072RBT6 trades USB for enhanced security and memory - ideal for encrypted sensor gateways - while STM32L053R8T6 adds LCD driving capability without altering power or USB behavior, making it a drop-in upgrade for display-enabled variants.
Availability
STM32L052R6T6 is available at Aetrix Electronics and suitable for battery-powered industrial sensors, portable medical monitors, and wireless smoke detectors requiring stable component supply and long-term lifecycle assurance.
Supply support for STM32L052R6T6 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.
The STM32L0 series targets ultra-low-power embedded applications - optimized for energy harvesting, coin-cell operation, and extended battery life in IoT edge nodes and portable diagnostics equipment.
FAQ
What is the maximum operating frequency and voltage range of the STM32L052R6T6?
The STM32L052R6T6 operates at up to 32 MHz CPU frequency across a supply voltage range of 1.65 V to 3.6 V. Its dynamic voltage scaling supports three operating ranges (Range 1: 1.65–1.95 V, Range 2: 1.95–3.6 V, Range 3: 2.95–3.6 V), enabling optimal power/performance trade-offs per application need.
Does the STM32L052R6T6 support USB without an external crystal?
Yes - it integrates a self-calibrating 48 MHz HSI48 RC oscillator synchronized to the USB Start-of-Frame (SOF) token, eliminating the need for an external crystal or oscillator. This feature is confirmed in Section 3.18.5 of DS10182 Rev 10 and enables full USB 2.0 full-speed communication in crystal-less mode.
How many I/O pins are 5 V tolerant, and which packages support them?
45 of the 51 GPIOs on the STM32L052R6T6 are 5 V tolerant, verified per Section 6.3.13 of DS10182 Rev 10. This applies specifically to the LQFP64 package (R6 variant), where pins PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD12, and PH0–PH1 are rated for 5 V input even when VDD = 1.8 V.
What is the endurance and retention specification for the embedded EEPROM?
The 2 KB embedded EEPROM supports 100,000 write/erase cycles and guarantees data retention for 20 years at 85 °C (or 40 years at 25 °C), as specified in Table 53 of DS10182 Rev 10. It includes ECC for bit-error correction and sector-level write protection to prevent accidental overwrites.
STM32L052R6T6 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, I2S, POR, PWM, WDT
- Number of I/O:
- 51
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.65V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L052R6T6 FAQ
1.How can I place an order for STM32L052R6T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L052R6T6 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 STM32L052R6T6 reliable?
The price and inventory of STM32L052R6T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L052R6T6 is usually 5 days.
3.What payment methods are accepted for STM32L052R6T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L052R6T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L052R6T6?
STM32L052R6T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L052R6T6 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 STM32L052R6T6?
For technical support, including STM32L052R6T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L052R6T6 requirements.
6.How does Aetrix verify that STM32L052R6T6 is sourced from the original manufacturer or authorized distributors?
All STM32L052R6T6 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 STM32L052R6T6 meets industry standards.
7.What is the process for return or replacement of STM32L052R6T6?
All STM32L052R6T6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L052R6T6, 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 STM32L052R6T6 part is unused and in its original packaging.
Return procedure for STM32L052R6T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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