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STMicroelectronics STM32L051C6T6
- Part No.:
- STM32L051C6T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L051C6T6.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:820
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Product details
Overview
STM32L051C6T6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5×5 mm) package, featuring 32 KB Flash, 8 KB SRAM, 2 KB EEPROM with ECC, 12-bit ADC (1.14 Msps), and operation down to 1.65 V. It delivers 0.95 DMIPS/MHz performance at up to 32 MHz and supports 45 5V-tolerant I/Os - deployed in battery-powered sensor nodes and portable medical devices requiring sub-µA standby current.
For engineers reviewing the STM32L051C6T6 datasheet, STM32L051C6T6 pinout, STM32L051C6T6 application, or STM32L051C6T6 equivalent, key selection criteria include verified 0.27 µA Standby mode (2 wakeup pins), 88 µA/MHz Run-mode efficiency, dual ultra-low-power comparators with wake-up capability, and integrated 32 kHz RTC oscillator with calibration - all validated for industrial-grade (-40 to +125 °C) operation.
Technical Context
The STM32L051C6T6 integrates an Arm Cortex-M0+ core with Memory Protection Unit (MPU), supporting dynamic voltage scaling across three power ranges (1.65–3.6 V). Its clock system combines multiple internal sources (HSI16 ±1%, LSI 37 kHz, MSI 65 kHz–4.2 MHz) and external options (1–25 MHz HSE, 32 kHz LSE), enabling precise low-power timing control via programmable PLL and dedicated LPTIM.
Power management includes five BOR thresholds, programmable voltage detector (PVD), and seven low-power modes - from 0.27 µA Standby (with two dedicated wakeup pins) to 0.8 µA Stop mode + RTC + full 8 KB RAM retention - all coordinated by a dedicated ultra-low-power supply supervisor block independent of main regulator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ with MPU, 0.95 DMIPS/MHz @ 32 MHz - enables deterministic real-time control in energy-constrained edge nodes. |
| Memory | 32 KB Flash with ECC + 8 KB SRAM + 2 KB EEPROM with ECC - ensures firmware integrity and nonvolatile data logging without external components. |
| ADC | 12-bit, 1.14 Msps, 16-channel, operational down to 1.65 V - supports high-resolution analog sensing in single-cell battery systems. |
| Low-Power Modes | 0.27 µA Standby (2 wakeup pins), 0.4 µA Stop (16 wakeup lines), 0.8 µA Stop+RTC+RAM retention - extends coin-cell life beyond 10 years in periodic-sensing applications. |
| I/O Capability | 45 GPIOs, 45 5V-tolerant - simplifies interface to legacy peripherals and mixed-voltage signal chains without level shifters. |
| Timers | 9 timers including 1x ultra-low-power LPTIM, 2x watchdogs (independent/window), and RTC with calendar - enables precise timekeeping and fail-safe operation in unattended deployments. |
| Communication | 2x USART (ISO 7816/IrDA), 1x LPUART, 4x SPI (16 Mbit/s), 2x I2C (SMBus/PMBus) - supports secure smart-card interfaces and multi-sensor I2C buses with clock stretching. |
Pinout & Package
STM32L051C6T6 uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32 leads, compliant with ECOPACK2 environmental standards. Pin assignments are validated per STMicroelectronics datasheet DS10184 Rev 10, Section 4 "Pin descriptions".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.65–3.6 V) | Primary core and I/O rail; supports direct connection to single Li-ion or two alkaline cells. |
| VSS | Ground reference | Dedicated analog/digital ground plane connection point for noise-sensitive ADC and comparators. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–3.6 V logic levels and supports external debounced pushbutton. |
| PA0–PA15 | General-purpose I/O / alternate functions | Configurable as GPIO, ADC inputs, timer channels, or USART/SPI/I2C signals - 45 total I/Os include 45 5V-tolerant pins. |
| PC13–PC15 | RTC-related functions | PC13 = RTC_OUT/ALARM; PC14/PC15 = 32.768 kHz crystal oscillator pins - enable autonomous calendar/timekeeping during Stop/Standby. |
| BOOT0 | Boot mode selection | High at reset selects system memory bootloader (USART/SPI); low selects user Flash - enables field firmware updates without debugger. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power BOR | 5 selectable brownout thresholds (1.65–2.9 V) - prevents erratic operation during battery sag while preserving wakeup latency. |
| ECC-enabled memories | Flash and EEPROM protected by hardware ECC - eliminates need for software checksums in safety-critical data storage. |
| Serial wire debug (SW-DP) | Single-pin debug interface with full SWD protocol support - enables in-system programming and real-time trace without JTAG overhead. |
| Pre-programmed bootloader | Factory-loaded USART/SPI bootloader - allows firmware updates over UART or SPI without external programmer or debug probe. |
| Temperature sensor | Calibrated on-chip sensor (±1.5°C accuracy) with dedicated ADC channel - enables thermal monitoring without external components. |
Applications
| Smart Utility Metering | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-operated gas/water meter with hourly pressure/flow sampling and LoRaWAN transmission. IC Role / Device Role / Timing Role: Main controller executing sensor acquisition, CRC-protected data logging to EEPROM, RTC-triggered transmission windows, and ultra-low-power sleep scheduling. Use Value: 0.27 µA Standby current extends 10-year battery life; 2 KB EEPROM stores 5+ years of tamper-proof consumption logs with ECC integrity. | Use Scenario: Disposable ECG patch with 7-day continuous monitoring and Bluetooth LE alert transmission. IC Role / Device Role / Timing Role: Signal acquisition hub managing 12-bit ADC sampling, dual comparator-based R-peak detection, and LPUART-to-Bluetooth bridge. Use Value: 0.8 µA Stop+RTC+RAM mode preserves context across deep sleep; 45 5V-tolerant I/Os interface directly to analog front-end op-amps and BLE module. |
| Industrial Wireless Sensor Node | Asset Tracking Beacon |
Use Scenario: Vibration/temperature node in factory machinery, reporting via NB-IoT every 15 minutes. IC Role / Device Role / Timing Role: Low-power coordinator handling accelerometer data fusion, temperature-compensated RTC wakeups, and SPI-driven modem control. Use Value: 3.5 µs wakeup from RAM enables rapid sensor readout before modem activation; 88 µA/MHz Run efficiency minimizes duty-cycle energy loss. | Use Scenario: GPS-denied indoor logistics tag using UWB ranging and BLE presence broadcast. IC Role / Device Role / Timing Role: Timing anchor managing synchronized UWB pulse generation, BLE advertising intervals, and backup register-stored last-known position. Use Value: 20-byte backup registers retain critical state across 0.4 µA Stop mode; calibrated 32 kHz LSE ensures ±5 ppm RTC accuracy for time-of-flight calculations. |
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 |
|---|---|---|---|
| STM32L071C8T6 | 64 KB Flash, 20 KB SRAM, same package - adds USB 2.0 FS device, more timers, and enhanced crypto acceleration. | Required when USB connectivity or larger firmware footprint needed; higher active current (92 µA/MHz) reduces battery life. | Select only if USB interface or >32 KB code space is mandatory; otherwise STM32L051C6T6 offers better power efficiency for simple sensing tasks. |
| EFM32HG309F64G | Silicon Labs ARM Cortex-M0+, 64 KB Flash, 8 KB RAM, 0.18 µA Deep Sleep - lacks EEPROM and RTC calibration but offers faster wakeup (2 µs). | Better suited for burst-sensing applications needing fastest possible wake; no built-in EEPROM requires external serial flash for nonvolatile storage. | Choose when sub-0.2 µA sleep dominates design priority and EEPROM is not required; STM32L051C6T6 preferred when integrated data logging is essential. |
Compared with STM32L071C8T6 and EFM32HG309F64G, the STM32L051C6T6 uniquely balances minimal standby current (0.27 µA), on-chip ECC EEPROM, and production-proven industrial temperature range - making it optimal for cost-sensitive, long-life battery applications where USB or extreme wakeup speed are unnecessary.
Availability
STM32L051C6T6 is available at Aetrix Electronics and suitable for smart utility metering, wearable health monitors, industrial wireless sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.
Supply support for STM32L051C6T6 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 analog products for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications, emphasizing sub-µA standby operation, integrated EEPROM, and robust peripheral sets for battery-powered IoT endpoints - with STM32L051C6T6 optimized for compact, cost-efficient designs in the 32-pin UFQFPN form factor.
FAQ
What is the maximum operating frequency and associated power consumption of STM32L051C6T6?
The STM32L051C6T6 operates at up to 32 MHz with 0.95 DMIPS/MHz performance. At this frequency, typical Run-mode current is 88 µA/MHz (2.82 mA total at 32 MHz, 3.3 V), measured with code executing from Flash and peripherals idle. Power scales linearly with clock speed and voltage, and dynamic voltage scaling enables further reduction in lower-frequency modes.
Does STM32L051C6T6 support hardware encryption or secure boot features?
No, the STM32L051C6T6 does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot circuitry. It provides basic security via read-out protection (RDP) levels and write protection for Flash/EEPROM sectors. For applications requiring certified secure firmware loading, ST's STM32L082 or STM32L5 series should be considered instead.
Can STM32L051C6T6 drive standard 5 V logic peripherals directly?
Yes - all 45 GPIOs on STM32L051C6T6 are 5V-tolerant when configured as inputs, meaning they safely accept 0–5 V signals even with VDD at 1.65–3.6 V. However, output high level is limited to VDD (not 5 V), so external level-shifting is required for driving 5 V logic inputs that demand >VDD high-level thresholds.
What development tools are officially supported for STM32L051C6T6 firmware development?
STMicroelectronics officially supports STM32CubeIDE (free Eclipse-based IDE), STM32CubeMX (graphical initialization tool), and ST-LINK/V2-1 debug probes. The device is compatible with Nucleo-L053R8 and Discovery kits via SWD interface. Keil MDK-ARM and IAR Embedded Workbench also provide certified toolchains with CMSIS-Pack support for this part.
STM32L051C6T6 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
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 37
- 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 10x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L051C6T6 FAQ
1.How can I place an order for STM32L051C6T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L051C6T6 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 STM32L051C6T6 reliable?
The price and inventory of STM32L051C6T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L051C6T6 is usually 5 days.
3.What payment methods are accepted for STM32L051C6T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L051C6T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L051C6T6?
STM32L051C6T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L051C6T6 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 STM32L051C6T6?
For technical support, including STM32L051C6T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L051C6T6 requirements.
6.How does Aetrix verify that STM32L051C6T6 is sourced from the original manufacturer or authorized distributors?
All STM32L051C6T6 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 STM32L051C6T6 meets industry standards.
7.What is the process for return or replacement of STM32L051C6T6?
All STM32L051C6T6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L051C6T6, 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 STM32L051C6T6 part is unused and in its original packaging.
Return procedure for STM32L051C6T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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