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STMicroelectronics STM32L052C8T6
- Part No.:
- STM32L052C8T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L052C8T6.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:23,828
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Product details
Overview
STM32L052C8T6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP32 package, featuring 64 KB Flash, 8 KB SRAM, 2 KB EEPROM with ECC, USB 2.0 crystal-less interface, and 12-bit ADC (1.14 Msps) - deployed in battery-powered IoT sensors and portable medical monitors requiring sub-1 µA Stop mode operation.
For engineers reviewing the STM32L052C8T6 datasheet, STM32L052C8T6 pinout, STM32L052C8T6 application, or STM32L052C8T6 equivalent, key selection criteria include wakeup time from Stop mode (5 µs), 32 MHz max CPU frequency, 45 I/Os (5V tolerant), USB battery charging detection, and integrated true RNG for secure firmware updates.
Technical Context
The STM32L052C8T6 implements a dual-voltage domain architecture with programmable voltage scaling (PVS) enabling dynamic power optimization across Run, Sleep, Stop, and Standby modes. Its clock system integrates six independent sources: HSE (1–25 MHz), LSE (32 kHz), 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 matrix supporting concurrent DMA transfers to ADC, DAC, USART, SPI, I2C, and timers. The device includes a dedicated low-power timer (LPTIM) with autonomous wake-up capability and hardware-accelerated CRC unit for firmware integrity verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+ @ up to 32 MHz; 0.95 DMIPS/MHz - enables real-time sensor fusion on <100 µA average current in active duty cycles. |
| Memory | 64 KB Flash (ECC-protected), 8 KB SRAM, 2 KB EEPROM (ECC-protected) - supports robust firmware storage and nonvolatile parameter retention without external components. |
| Power Modes | 0.27 µA Standby (2 wakeup pins), 0.4 µA Stop (16 wakeup lines), 0.8 µA Stop + RTC + 8 KB RAM retention - extends coin-cell battery life to >10 years in periodic-sensing applications. |
| Analog Peripherals | 12-bit ADC (16-channel, 1.14 Msps), 12-bit DAC (1 channel), 2x ultra-low-power comparators - enables simultaneous voltage monitoring, actuator control, and windowed threshold detection down to 1.65 V supply. |
| Communication | 1x USB 2.0 (crystal-less, battery charging detection), 2x USART (ISO 7816/IrDA), 1x LPUART, 4x SPI (16 Mbit/s), 2x I2C (SMBus/PMBus) - supports direct USB-C connectivity and legacy smart-card protocols without external PHY. |
| Timers & Security | 9x timers including LPTIM, RTC, SysTick, and 2x watchdogs (IWDG/WWDG); True RNG + firewall protection - provides precise timing for BLE beacon intervals and runtime code integrity enforcement. |
Pinout & Package
LQFP32 (7 × 7 mm, 0.8 mm pitch) package with 25 general-purpose I/Os, 3 power/ground pins, and dedicated USB D+/D− pins. All I/Os support interrupt capability and most are 5V tolerant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDDA for analog peripherals (1.65–3.6 V), VDD for digital core - enables mixed-signal operation with independent noise filtering. |
| PA0–PA15, PB0–PB11 | General-purpose I/Os | Up to 25 GPIOs; 45 total I/Os available across full family - 22 usable in LQFP32; all support EXTI, most 5V tolerant - simplifies level-shifting in mixed-voltage systems. |
| PA11/PA12 | USB D−/D+ | Crystal-less USB 2.0 interface with built-in transceiver and battery charging detection - eliminates external oscillator and BC1.2 IC in portable chargers. |
| PA4–PA7 | ADC IN1–IN4 | Four dedicated analog inputs with 12-bit resolution and 1.14 Msps sampling - supports simultaneous acquisition of temperature, voltage, current, and ambient light in compact wearables. |
| PA4 | DAC OUT1 | Buffered 12-bit DAC output (1.8–3.6 V range) - drives piezoelectric actuators or reference voltages without external op-amps. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode | 0.4 µA with 16 wakeup lines - enables event-driven sensing in energy-harvesting nodes where wake-on-motion or wake-on-voltage-threshold must consume <1 µA. |
| Crystal-less USB | HSI48 self-calibrated to ±0.25% over temperature/voltage - removes 12 MHz crystal and matching capacitors, reducing BOM cost and PCB area by ~3 mm². |
| Capacitive touch sensing | 24-channel TSC supporting touchkey, linear, and rotary sensors - allows integration of intuitive user interfaces in medical handhelds without dedicated touch controller IC. |
| ECC-protected memory | Flash and EEPROM with error correction - prevents silent data corruption in long-life industrial deployments where firmware updates occur infrequently over 15+ year lifetimes. |
| True random number generator | Digital entropy source compliant with NIST SP800-90B - delivers cryptographically secure keys for TLS handshake and firmware signature verification in constrained edge devices. |
Applications
| Smart Utility Meter | Portable ECG Monitor |
|---|---|
Use Scenario: Battery-operated gas/water meter reading data every 15 minutes, transmitting via NB-IoT. IC Role / Device Role / Timing Role: Main MCU managing sensor polling, RTC-based scheduling, AES-128 encryption, and low-power UART-to-modem interface. Use Value: 0.27 µA Standby current extends AA battery life beyond 12 years; USB interface enables field firmware updates via technician's laptop without opening enclosure. |
Use Scenario: Handheld single-lead ECG device acquiring analog signals, performing real-time QRS detection, and storing waveform snippets. IC Role / Device Role / Timing Role: Signal acquisition controller running ADC at 1 ksps, executing FIR filter on Cortex-M0+, buffering data to SRAM, and triggering alerts on arrhythmia patterns. Use Value: 12-bit ADC with 1.14 Msps oversampling enables 16-bit effective resolution; 8 KB SRAM holds >30 seconds of raw waveform at 1 ksps. |
| Wireless Sensor Node | Industrial Temperature Logger |
Use Scenario: LoRaWAN node measuring ambient temperature/humidity, logging data locally, and transmitting hourly. IC Role / Device Role / Timing Role: System orchestrator managing TSC-based button input, I2C humidity sensor, SPI flash logging, and LoRa transceiver control. Use Value: 2 KB EEPROM stores calibration coefficients and device identity; 5 µs wakeup from Flash ensures rapid response to external interrupts without latency penalty. |
Use Scenario: DIN-rail mounted logger recording temperature every 10 seconds using PT100 sensor, with 10-year battery backup. IC Role / Device Role / Timing Role: Precision analog front-end controller using 12-bit ADC with internal reference, RTC with calendar, and 2 KB EEPROM for calibration drift compensation. Use Value: 0.8 µA Stop mode + RTC + 8 KB RAM retention preserves timestamped logs during mains failure; -40 to 125 °C rating ensures reliability in unconditioned enclosures. |
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 |
|---|---|---|---|
| STM32L072CZT6 | 192 KB Flash, 20 KB SRAM, no USB, adds AES-128 accelerator and additional I2C/SPI channels | Better suited for encrypted sensor hub designs requiring local data aggregation but no direct USB connectivity | Select when firmware size exceeds 64 KB or cryptographic acceleration is required; avoid if USB device functionality is mandatory. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 1024 KB Flash, 256 KB RAM, 1.4 µA Stop mode, no USB, higher active power (110 µA/MHz) | Targeted at high-fidelity audio processing or complex motor control where M4 DSP extensions outweigh power penalty | Choose only when floating-point math or advanced filtering justifies 3× higher active current and loss of USB interface. |
Compared with STM32L052C8T6, STM32L072CZT6 trades USB for larger memory and crypto acceleration - ideal for secure gateway nodes - while EFM32PG12B500F1024GL125 offers M4 performance at significantly higher power cost, making it unsuitable for USB-powered or coin-cell applications.
Availability
STM32L052C8T6 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, portable medical monitors, and industrial temperature loggers requiring stable component supply and long-term lifecycle assurance.
Supply support for STM32L052C8T6 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, specializing in microcontrollers, power management, and MEMS sensors for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications demanding sub-1 µA standby current, integrated analog peripherals, and secure firmware execution - optimized for energy-constrained edge devices with 10+ year field deployment requirements.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L052C8T6 operates up to 32 MHz with 88 µA/MHz typical current consumption when executing code from Flash. At 32 MHz, this yields ~2.8 mA total active current - verified per DS10182 Rev 10 Table 29. This value assumes VDD = 3.3 V, 25 °C, and standard peripheral clocks enabled.
Does the device support USB device mode without an external crystal?
Yes. The STM32L052C8T6 integrates a factory-trimmed 48 MHz HSI48 RC oscillator with automatic self-calibration against USB SOF packets, achieving ±0.25% accuracy across temperature and voltage. This eliminates need for external 12 MHz crystal and associated load capacitors per Section 3.18.5 of DS10182.
How many I/O pins are 5V tolerant in the LQFP32 package?
22 of the 25 GPIOs in the LQFP32 variant are 5V tolerant (PA0–PA15, PB0–PB11 excluding PB10/PB11 which are not bonded out). This is confirmed in Table 16 (Pin Definitions) and Section 3.7 of DS10182 Rev 10, enabling direct interfacing with 5V logic without level shifters.
What is the minimum supply voltage for ADC operation with full 12-bit accuracy?
The 12-bit ADC maintains full specification (INL ≤ ±1.5 LSB) down to 1.65 V supply, as stated in Section 6.3.15 and Table 63 of DS10182 Rev 10. Below 1.65 V, operation is not guaranteed - the device includes a programmable voltage detector (PVD) to trigger safe shutdown before ADC accuracy degrades.
STM32L052C8T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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:
- 37
- Program Memory Size:
- 64KB (64K 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 10x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L052C8T6 FAQ
1.How can I place an order for STM32L052C8T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L052C8T6 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 STM32L052C8T6 reliable?
The price and inventory of STM32L052C8T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L052C8T6 is usually 5 days.
3.What payment methods are accepted for STM32L052C8T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L052C8T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L052C8T6?
STM32L052C8T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L052C8T6 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 STM32L052C8T6?
For technical support, including STM32L052C8T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L052C8T6 requirements.
6.How does Aetrix verify that STM32L052C8T6 is sourced from the original manufacturer or authorized distributors?
All STM32L052C8T6 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 STM32L052C8T6 meets industry standards.
7.What is the process for return or replacement of STM32L052C8T6?
All STM32L052C8T6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L052C8T6, 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 STM32L052C8T6 part is unused and in its original packaging.
Return procedure for STM32L052C8T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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