STM32L051C8T6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
Référence : STM32L051C8T6 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.6909 | $1,69 |
| 10 | $1.2212 | $12,21 |
| 100 | $1.0803 | $108,03 |
| 500 | $1.0333 | $516,65 |
| 1 000 | $0.9864 | $986,40 |
| 1 500 | $0.9773 | $1 465,95 |
STM32L051C8T6 Présentation
What is an ultra-low-power microcontroller? An ultra-low-power microcontroller is a type of embedded processor designed to minimize energy consumption while maintaining computational capability. It fits within the broader hierarchy: ARM Cortex-M0+ core -> 32-bit microcontroller -> embedded processor -> semiconductor. These devices are optimized for applications where battery life is critical, such as IoT sensors, wearables, and portable medical devices. The STM32L0 series specifically targets the low-power segment with multiple sleep modes and dynamic voltage scaling.
Key features include a 12-bit ADC with hardware oversampling, a low-power UART, and a real-time clock (RTC) with calendar. The device supports a wide operating temperature range of -40°C to +85°C and is available in a 48-pin LQFP package. The STM32L051C8T6 also includes a unique device ID, CRC calculation unit, and a true random number generator (RNG) for security applications.
Technically, the STM32L051C8T6 is built on ST's ultra-low-power technology, featuring a flexible clock tree with multiple internal/external oscillators. It supports a 1.8V to 3.6V power supply and has a typical current consumption of 3.4 µA in Stop mode with RTC, and 0.29 µA in Standby mode. The device also includes a brown-out reset (BOR) and power-on reset (POR) for reliable operation.
Typical applications include IoT sensor nodes, smart home devices, portable medical monitors, and industrial sensor interfaces. Its low power consumption and rich analog peripherals make it suitable for battery-powered designs where long operational life is required.
When designing with this MCU, pay attention to the power supply decoupling and the selection of the appropriate low-power mode for your application. Use the STM32CubeMX tool to configure the clock tree and peripherals efficiently.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the ST datasheet, providing a comprehensive resource for engineers evaluating the STM32L051C8T6.
Alternatives de remplacement direct pour STM32L051C8T6 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec STM32L051C8T6 (même facteur de forme et même empreinte) — différant par Communication Interfaces, Core, Operating Temperature, Package, Timers.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
STM32L051C8T6TR
📋 Alternative de référence (hors catalogue)
STM32L051C8T7
📋 Alternative de référence (hors catalogue)
STM32L051C8T6D
📋 Alternative de référence (hors catalogue)
STM32L051C8T6 Valeurs maximales et caractéristiques électriques
| Core | ARM Cortex-M0+ |
| Max Clock Frequency | 32 MHz |
| Flash Memory | 64 KB |
| SRAM | 8 KB |
| Tension d'alimentation | 1.8 V to 3.6 V |
| Température de fonctionnement | -40°C to +85°C |
| Boîtier | LQFP-48 (7x7 mm) |
| ADC Resolution | 12-bit |
| ADC Channels | 10 |
| Communication Interfaces | I2C, SPI, USART |
| Timers | 5x 16-bit, 1x 32-bit |
| RTC | Yes (with calendar) |
| Low-Power Modes | Sleep, Low-power run, Low-power sleep, Stop, Standby |
| Standby Current | 0.29 µA |
| Stop Mode Current (with RTC) | 3.4 µA |
| Statut RoHS | Compliant |
Configuration des broches de STM32L051C8T6
| Broche 1 | VBAT — Battery backup supply for RTC |
| Broche 2 | PC14 — GPIO / OSC32_IN |
| Broche 3 | PC15 — GPIO / OSC32_OUT |
| Broche 4 | OSC_IN — External clock input |
| Broche 5 | OSC_OUT — External clock output |
| Broche 6 | NRST — Reset (active low) |
| Broche 7 | VSSA — Analog ground |
| Broche 8 | VDDA — Analog power supply |
| Broche 9 | PA0 — GPIO / ADC_IN0 |
| Broche 10 | PA1 — GPIO / ADC_IN1 |
| Broche 11 | PA2 — GPIO / USART2_TX |
| Broche 12 | PA3 — GPIO / USART2_RX |
| Broche 13 | PA4 — GPIO / SPI1_NSS |
| Broche 14 | PA5 — GPIO / SPI1_SCK |
| Broche 15 | PA6 — GPIO / SPI1_MISO |
| Broche 16 | PA7 — GPIO / SPI1_MOSI |
| Broche 17 | PB0 — GPIO / ADC_IN8 |
| Broche 18 | PB1 — GPIO / ADC_IN9 |
| Broche 19 | PB2 — GPIO / BOOT1 |
| Broche 20 | PB10 — GPIO / I2C2_SCL |
| Broche 21 | PB11 — GPIO / I2C2_SDA |
| Broche 22 | VSS — Ground |
| Broche 23 | VDD — Power supply |
| Broche 24 | PB12 — GPIO / SPI2_NSS |
| Broche 25 | PB13 — GPIO / SPI2_SCK |
| Broche 26 | PB14 — GPIO / SPI2_MISO |
| Broche 27 | PB15 — GPIO / SPI2_MOSI |
| Broche 28 | PA8 — GPIO / MCO |
| Broche 29 | PA9 — GPIO / USART1_TX |
| Broche 30 | PA10 — GPIO / USART1_RX |
| Broche 31 | PA11 — GPIO / USART1_CTS |
| Broche 32 | PA12 — GPIO / USART1_RTS |
| Broche 33 | PA13 — GPIO / SWDIO |
| Broche 34 | PA14 — GPIO / SWCLK |
| Broche 35 | PA15 — GPIO / SPI1_NSS |
| Broche 36 | PB3 — GPIO / SPI1_SCK |
| Broche 37 | PB4 — GPIO / SPI1_MISO |
| Broche 38 | PB5 — GPIO / SPI1_MOSI |
| Broche 39 | PB6 — GPIO / I2C1_SCL |
| Broche 40 | PB7 — GPIO / I2C1_SDA |
| Broche 41 | BOOT0 — Boot mode selection |
| Broche 42 | PB8 — GPIO / I2C1_SCL |
| Broche 43 | PB9 — GPIO / I2C1_SDA |
| Broche 44 | VSS — Ground |
| Broche 45 | VDD — Power supply |
| Broche 46 | PC13 — GPIO / RTC_TAMP1 |
| Broche 47 | PC14 — GPIO / OSC32_IN |
| Broche 48 | PC15 — GPIO / OSC32_OUT |
Applications typiques
STM32L051C8T6 convient pour 6 applications: IoT Sensor Nodes, Smart Home Devices, Portable Medical Monitors, Industrial Sensor Interfaces, Wearable Devices, Energy Harvesting Systems.
IoT Sensor Nodes
The STM32L051C8T6 is ideal for IoT sensor nodes due to its ultra-low-power modes and multiple communication interfaces. Its 0.29 µA standby current allows battery-powered sensors to operate for years. The 12-bit ADC can interface with various analog sensors, while I2C/SPI/USART enable connection to wireless modules like LoRa or BLE. In a typical node, the MCU wakes periodically, reads sensors, and transmits data, minimizing energy consumption. The wide supply voltage range (1.8V-3.6V) allows direct battery connection without a regulator, simplifying the design and improving efficiency.
Recommandé
Smart Home Devices
The STM32L051C8T6 is well-suited for smart home devices such as smart thermostats, lighting controls, and security sensors. Its low power consumption enables battery-powered operation, while the RTC with calendar allows scheduling and time-stamping. The device can interface with various sensors and actuators through its GPIO and communication interfaces. For example, in a smart thermostat, the MCU reads temperature sensors, controls a relay or motor, and communicates with a central hub via UART or I2C. The low-power modes ensure minimal energy usage when idle, extending battery life in wireless devices.
Recommandé
Portable Medical Monitors
The STM32L051C8T6 is suitable for portable medical monitors like heart rate monitors, glucose meters, and pulse oximeters. Its low power consumption is critical for battery-operated devices that need to last long between charges. The 12-bit ADC can accurately sample analog signals from sensors, and the low-power modes allow the device to sleep between measurements. The MCU's small footprint (LQFP-48) enables compact device designs. In a pulse oximeter, the MCU processes signals from an optical sensor, calculates oxygen saturation, and displays results on an LCD, all while maintaining low energy consumption.
Recommandé
Industrial Sensor Interfaces
The STM32L051C8T6 is used in industrial sensor interfaces for monitoring temperature, pressure, and flow. Its robust operating temperature range (-40°C to +85°C) and wide supply voltage make it suitable for harsh environments. The device can interface with 4-20 mA loops, RTDs, and thermocouples through its ADC and comparators. In a typical industrial sensor node, the MCU reads sensor data, performs calibration, and communicates via RS-485 or CAN (through external transceiver). The low-power modes are less critical here, but the MCU's reliability and peripheral set make it a cost-effective choice.
Recommandé
Wearable Devices
The STM32L051C8T6 is ideal for wearable devices like fitness trackers and smartwatches due to its ultra-low power consumption and small package. The MCU can run on a small coin cell battery for months, thanks to its low standby current and efficient sleep modes. It can interface with accelerometers, heart rate sensors, and displays. In a fitness tracker, the MCU collects motion data from an accelerometer, processes steps, and communicates with a smartphone via BLE (through an external module). The 1.8V-3.6V supply range allows direct battery connection, and the RTC can track time and date.
Recommandé
Energy Harvesting Systems
The STM32L051C8T6 is well-suited for energy harvesting systems that collect energy from solar, thermal, or vibration sources. Its ultra-low power consumption allows it to operate with the limited energy harvested. The MCU can wake up periodically to take measurements and transmit data, then return to a low-power state. The wide supply voltage range (1.8V-3.6V) is compatible with energy harvesting power management ICs. In a solar-powered sensor node, the MCU manages the power budget, reads sensors, and sends data via a low-power radio, ensuring sustainable operation without batteries.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour STM32L051C8T6 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | STM32L051C8T6TR | STM32L051C8T7 | STM32L051C8T6D |
|---|---|---|---|---|
| Package | LQFP-48 | LQFP-48 - same | LQFP-48 - same | LQFP-48 - same |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB |
| Max Clock Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | -40°C to +105°C | -40°C to +85°C |
| Standby Current | 0.29 µA | 0.29 µA | 0.29 µA | 0.29 µA |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit |
| Communication Interfaces | I2C, SPI, USART | I2C, SPI, USART | I2C, SPI, USART | I2C, SPI, USART |
| Price (1000 pcs) | $1.82 | $1.82 | $2.10 | $1.90 |
Principaux différenciateurs
- Ultra-low standby current of 0.29 µA (vs STM32L071C8T6)
- Cost-effective 64 KB Flash option (vs STM32L071C8T6)
- Pin-compatible with higher-end STM32L0 variants (vs STM32L071C8T6)
Notes de conception
Decouple the VDD and VDDA pins with 100 nF ceramic capacitors placed as close as possible to the pins. Additionally, use a 4.7 µF capacitor on VDDA for analog noise filtering. For battery-powered designs, consider using the VBAT pin for RTC backup with a separate coin cell to maintain timekeeping when the main supply is removed.
Ensure a solid ground plane under the LQFP-48 package to minimize noise and improve thermal performance. Route the crystal oscillator (OSC_IN/OSC_OUT) with short traces and keep them away from high-speed digital signals. Use ground vias around the crystal to reduce EMI.
Do not leave unused GPIO pins floating; configure them as outputs or enable internal pull-ups/pull-downs to avoid excessive leakage current. Also, ensure the BOOT0 pin is properly tied to ground for normal boot from Flash. When using low-power modes, verify that all peripherals are properly disabled to achieve the specified standby current.
Informations de conformité
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified - this is a general-purpose MCU, not automotive grade.
