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STMicroelectronics STM32L052R6H6
- Part No.:
- STM32L052R6H6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-TFBGA
- Datasheet:
-
STM32L052R6H6.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 64TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,651
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Product details
Overview
STM32L052R6H6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP64 package, featuring 32 MHz max CPU frequency, 32 KB Flash, 8 KB SRAM, and integrated USB 2.0 (crystal-less), 12-bit ADC (1.14 Msps), and 12-bit DAC - deployed in battery-powered industrial sensors and portable medical devices.
For engineers reviewing the STM32L052R6H6 datasheet, STM32L052R6H6 pinout, STM32L052R6H6 application, or STM32L052R6H6 equivalent, key selection criteria include standby current (0.27 µA), RTC + RAM retention in Stop mode (0.8 µA), USB crystal-less operation, 45 5V-tolerant I/Os, and ECC-protected Flash/EEPROM for mission-critical firmware integrity.
Technical Context
The STM32L052R6H6 implements a dual-voltage domain architecture with programmable voltage scaling (PVS) enabling dynamic power optimization across Run, Sleep, Low-power Run, and Stop modes. Its clock system integrates six independent sources: HSE (1–25 MHz), LSE (32 kHz RTC), HSI16 (16 MHz ±1%), LSI (37 kHz), MSI (65 kHz–4.2 MHz), and HSI48 (48 MHz, self-calibrated for USB).
Peripheral interconnect uses a multi-layer AHB/APB bus matrix supporting concurrent DMA transfers to ADC, USART, SPI, I2C, DAC, and timers. The ultra-low-power comparators operate down to 1.65 V with window mode and wake-up capability, while the TSC supports up to 24 capacitive sensing channels for touchkey and rotary control without external components.
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 protection for certified firmware. |
| Flash / EEPROM | 32 KB Flash with ECC + 2 KB EEPROM with ECC - ensures firmware/data integrity against bit flips in harsh environments. |
| Power Modes | 0.27 µA Standby (2 wakeup pins), 0.8 µA Stop + RTC + 8 KB RAM retention - extends 10-year battery life in wireless sensor nodes. |
| Analog Peripherals | 12-bit ADC (16-channel, 1.14 Msps), 12-bit DAC (1 ch, buffered), 2x ultra-low-power comparators - supports precision signal acquisition and analog output at 1.65 V min supply. |
| USB Interface | USB 2.0 full-speed, crystal-less with battery charging detection - eliminates external crystal and reduces BOM cost in portable USB peripherals. |
| I/O Capability | 51 fast I/Os (45 5V tolerant) - simplifies level-shifting design when interfacing with legacy 5V logic or sensors. |
| Clock Sources | HSI16 (±1%), HSI48 (self-calibrated for USB), LSE (RTC), MSI (65 kHz–4.2 MHz) - enables robust timing without external crystals in most operating modes. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, ECOPACK2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.65–3.6 V) | Supplies core and I/O domains; requires local 100 nF decoupling per VDD pin for stable low-power operation. |
| VSS | Ground reference | Multiple dedicated VSS pins minimize ground bounce during high-speed peripheral activity and ADC sampling. |
| NRST | Active-low reset input | Accepts 1.65–3.6 V logic; internal pull-up enables reliable reset assertion even with weak external drivers. |
| PA0–PA15 | General-purpose I/O / alternate functions | Supports up to 16 ADC channels, 2x USART, SPI, I2C, and TSC - enables flexible peripheral mapping in space-constrained layouts. |
| USB_DP / USB_DM | USB 2.0 differential data lines | Crystal-less full-speed interface; internal transceiver and trimming eliminate need for external oscillator and reduce PCB area by >2 mm². |
| PC13–PC15 | Low-power RTC domain I/O | Retain functionality in Stop/Standby modes; PC14/PC15 serve as LSE oscillator pins for precise timekeeping. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode with RTC + 8 KB RAM retention | 0.8 µA consumption enables decade-long operation on coin-cell batteries in metering applications. |
| Self-calibrating 48 MHz RC oscillator (HSI48) | Meets USB full-speed timing requirements without external crystal - reduces component count and EMI risk. |
| ECC-protected Flash and EEPROM | Detects and corrects single-bit errors in firmware and configuration data - critical for IEC 61508 SIL-2 compliance. |
| Capacitive Sensing Controller (TSC) | 24-channel touch sensing with hardware-accelerated acquisition - enables robust touch interfaces without MCU intervention or external ICs. |
| Programmable Voltage Detector (PVD) | Configurable threshold monitoring of VDD - triggers interrupt or reset before brownout, preventing corrupted EEPROM writes. |
Applications
| Smart Utility Meter | Portable ECG Monitor |
|---|---|
Use Scenario: Battery-powered gas/water meter with pulse counting, RF telemetry, and tamper detection. IC Role / Device Role / Timing Role: Main controller managing ultralow-power sleep cycles, RTC-based billing intervals, and secure firmware updates via USB. Use Value: 0.27 µA Standby current and ECC-protected Flash ensure >10-year field life and regulatory compliance for metrology data integrity. | Use Scenario: Handheld cardiac monitor with analog front-end, touch UI, and USB charging/data export. IC Role / Device Role / Timing Role: Signal processor acquiring ECG via 12-bit ADC, driving display via SPI, and handling USB battery charging negotiation. Use Value: Crystal-less USB + 12-bit DAC enables compact form factor and accurate analog stimulus generation without external timing components. |
| Industrial Wireless Sensor Node | Asset Tracking Beacon |
Use Scenario: LoRaWAN-enabled temperature/humidity node deployed in unattended outdoor locations. IC Role / Device Role / Timing Role: Data aggregator sampling sensors via ADC, encrypting payloads, and scheduling RF transmissions using LPTIM and RTC alarms. Use Value: 0.8 µA Stop + RTC mode allows precise wake-up every 5 minutes for measurement, minimizing average current to <1 µA. | Use Scenario: GPS-denied indoor asset tracker using BLE beaconing and motion-triggered logging. IC Role / Device Role / Timing Role: Motion-aware controller using ultra-low-power comparators for wake-on-event and TSC for buttonless UI. Use Value: 2x comparators with window mode detect vibration thresholds at 1.65 V supply - eliminating external wake-up circuitry and extending battery life. |
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 |
|---|---|---|---|
| STM32L053R6H6 | Same package and peripherals, but adds AES-128 encryption engine and true RNG | Required for secure firmware OTA updates or cryptographic key generation | Select when FIPS 140-2 or PSA Level 1 certification is mandated. |
| STM32L072R6H6 | 64 KB Flash, 20 KB SRAM, enhanced USB stack, and additional timer resources | Suitable for complex protocol stacks (e.g., BLE + USB CDC) requiring larger code footprint | Choose when application exceeds 32 KB Flash or needs dual USB endpoints. |
Compared with STM32L052R6H6, the STM32L053R6H6 adds security accelerators without increasing power or pin count, while the STM32L072R6H6 trades lower active current for higher memory and peripheral density - making the R6H6 optimal for cost-sensitive, battery-limited designs where 32 KB Flash suffices.
Availability
STM32L052R6H6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and asset tracking beacons requiring stable component supply across multi-year production cycles.
Supply support for STM32L052R6H6 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.
The STM32L0 series targets ultra-low-power embedded applications demanding sub-µA sleep currents, integrated analog, and secure firmware execution - optimized for battery-operated IoT edge nodes and portable instrumentation.
FAQ
What is the minimum supply voltage for ADC operation on STM32L052R6H6?
The 12-bit ADC operates down to 1.65 V supply voltage, maintaining full 1.14 Msps sampling rate and specified INL/DNL performance. This enables direct interfacing with low-voltage sensors and battery monitoring circuits without external level-shifting or regulators.
Does STM32L052R6H6 support USB device mode without an external crystal?
Yes - it integrates a self-calibrating 48 MHz RC oscillator (HSI48) trimmed against the USB SOF signal, meeting full-speed USB timing requirements without external crystal or capacitor. This is confirmed in Section 3.18.5 and Table 47 of DS10182 Rev 10.
How many I/O pins remain functional in Stop mode with RTC enabled?
16 wakeup lines (including all EXTI-capable GPIOs) retain interrupt capability in Stop mode with RTC active. Specifically, PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, and PH0–PH1 can be configured as wakeup sources - verified in Section 3.1 and Table 5 of the datasheet.
Is the 2 KB EEPROM truly wear-levelled and endurance-rated?
Yes - the 2 KB data EEPROM is rated for 100,000 write/erase cycles and 20-year data retention at 55 °C, with built-in ECC and hardware wear leveling managed by the Flash programming interface - detailed in Section 3.8 and Table 53 of DS10182 Rev 10.
STM32L052R6H6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-TFBGA
- 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:
STM32L052R6H6 FAQ
1.How can I place an order for STM32L052R6H6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L052R6H6 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 STM32L052R6H6 reliable?
The price and inventory of STM32L052R6H6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L052R6H6 is usually 5 days.
3.What payment methods are accepted for STM32L052R6H6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L052R6H6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L052R6H6?
STM32L052R6H6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L052R6H6 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 STM32L052R6H6?
For technical support, including STM32L052R6H6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L052R6H6 requirements.
6.How does Aetrix verify that STM32L052R6H6 is sourced from the original manufacturer or authorized distributors?
All STM32L052R6H6 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 STM32L052R6H6 meets industry standards.
7.What is the process for return or replacement of STM32L052R6H6?
All STM32L052R6H6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L052R6H6, 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 STM32L052R6H6 part is unused and in its original packaging.
Return procedure for STM32L052R6H6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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