STM32L031K6T6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
MPN: STM32L031K6T6 ✓ Hoạt độngSTM32L031K6T6 Tóm tắt
What is an ultra-low-power microcontroller? An ultra-low-power microcontroller is a system-on-chip that integrates a processor core, memory, and peripherals while minimizing energy consumption, often featuring multiple low-power modes such as sleep, stop, and standby. These devices are essential in the hierarchy of embedded systems, from simple 8-bit MCUs to complex application processors, where power efficiency is critical for extending battery life in portable and IoT devices.
Key features include a 12-bit ADC with hardware oversampling, multiple communication interfaces (I2C, SPI, USART), and a rich set of timers including a low-power timer. The device supports a wide supply voltage range from 1.8V to 3.6V, with a typical operating current of 84 uA/MHz in Run mode and as low as 0.29 uA in Standby mode with RTC. The STM32L031K6T6 also integrates a true EEPROM emulation, a 12-bit DAC, and a comparator, making it versatile for analog sensing applications.
Technically, the STM32L031K6T6 is built on a 110nm process, offering a balance between performance and power. The Cortex-M0+ core includes a single-cycle multiplier and a nested vectored interrupt controller (NVIC), enabling efficient interrupt handling. The device features a flexible clocking system with an internal 16 MHz RC oscillator, an external crystal oscillator, and a PLL, allowing designers to optimize for speed or power.
Typical applications include portable medical devices, smart sensors, fitness trackers, and industrial monitoring systems. Its ultra-low-power modes and rich analog peripherals make it ideal for applications that require long battery life and precise analog measurements, such as wearable health monitors and environmental sensors.
When designing with this device, pay attention to the power supply decoupling: place a 100nF capacitor close to each VDD pin and a 1uF capacitor on the main supply. For lowest power consumption, use the STOP mode with the RTC running, and configure unused GPIOs as analog inputs to avoid leakage currents.
Bộ thay thế dễ dàng lắp đặt cho STM32L031K6T6 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với STM32L031K6T6 (cùng hình factor và footprint) — khác nhau ở Package, Flash Memory, Supply Voltage, RoHS Status, ADC.
STM32L031K4T6
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
STM32L031K8T6
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
STM32L051K6T6
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →STM32L071K6T6
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
STM32L031K6T6 Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M0+ |
| Max Clock Speed | 32 MHz |
| Flash Memory | 32 KB |
| SRAM | 8 KB |
| Điện áp cung cấp | 1.8 V to 3.6 V |
| Nhiệt độ hoạt động | -40C to +85C |
| Hộp | LQFP-32 (7x7 mm) |
| Kiểu lắp đặt | Surface Mount |
| ADC | 12-bit, 1.14 Msps, with hardware oversampling |
| DAC | 12-bit |
| Comparators | 2 |
| Timers | 5 (including 1 low-power timer) |
| Communication Interfaces | I2C, SPI, USART |
| GPIO | Up to 25 |
| Low-Power Modes | Sleep, Low-power run, Low-power sleep, Stop, Standby |
| Standby Current | 0.29 uA (with RTC) |
| Run Current | 84 uA/MHz |
| Trạng thái RoHS | Compliant |
Cấu hình chân STM32L031K6T6
| Chân 1 | VBAT — Battery backup supply for RTC |
| Chân 2 | PC14 — GPIO / OSC32_IN |
| Chân 3 | PC15 — GPIO / OSC32_OUT |
| Chân 4 | OSC_IN — External clock input |
| Chân 5 | OSC_OUT — External clock output |
| Chân 6 | NRST — Reset (active low) |
| Chân 7 | VDD — Digital power supply |
| Chân 8 | VSS — Ground |
| Chân 9 | PA0 — GPIO / ADC_IN0 |
| Chân 10 | PA1 — GPIO / ADC_IN1 |
| Chân 11 | PA2 — GPIO / USART2_TX |
| Chân 12 | PA3 — GPIO / USART2_RX |
| Chân 13 | PA4 — GPIO / DAC_OUT1 |
| Chân 14 | PA5 — GPIO / SPI1_SCK |
| Chân 15 | PA6 — GPIO / SPI1_MISO |
| Chân 16 | PA7 — GPIO / SPI1_MOSI |
| Chân 17 | PB0 — GPIO / ADC_IN8 |
| Chân 18 | PB1 — GPIO / ADC_IN9 |
| Chân 19 | PB2 — GPIO / BOOT1 |
| Chân 20 | PB10 — GPIO / I2C2_SCL |
| Chân 21 | PB11 — GPIO / I2C2_SDA |
| Chân 22 | PB12 — GPIO / SPI2_NSS |
| Chân 23 | PB13 — GPIO / SPI2_SCK |
| Chân 24 | PB14 — GPIO / SPI2_MISO |
| Chân 25 | PB15 — GPIO / SPI2_MOSI |
| Chân 26 | PA8 — GPIO / MCO |
| Chân 27 | PA9 — GPIO / USART1_TX |
| Chân 28 | PA10 — GPIO / USART1_RX |
| Chân 29 | PA11 — GPIO / USART1_CTS |
| Chân 30 | PA12 — GPIO / USART1_RTS |
| Chân 31 | PA13 — GPIO / SWDIO |
| Chân 32 | PA14 — GPIO / SWCLK |
Ứng dụng tiêu biểu
STM32L031K6T6 phù hợp cho 6 Áp dụngs: Wearable Health Monitor, Smart Sensor Node, Portable Medical Device, Industrial Monitoring System, IoT Edge Node, Battery Management System.
Wearable Health Monitor
The STM32L031K6T6 is ideal for wearable health monitors due to its ultra-low power consumption (84 uA/MHz in Run mode, 0.29 uA in Standby) and integrated analog peripherals. It can interface with biosensors (e.g., heart rate, temperature) via I2C or SPI, process data with the Cortex-M0+ core, and communicate via BLE through an external module. The 12-bit ADC with oversampling enables precise signal acquisition, while the low-power modes extend battery life to months. Designers can use the STOP mode with RTC to periodically wake the device for measurements, minimizing energy usage. The LQFP-32 package is compact enough for small form-factor PCBs, and the wide supply voltage range (1.8V-3.6V) allows direct coin-cell battery operation.
Được đề xuất
Smart Sensor Node
In industrial IoT and smart agriculture, the STM32L031K6T6 serves as a low-power sensor node controller. Its multiple communication interfaces (I2C, SPI, USART) allow connection to various sensors (temperature, humidity, pressure) and wireless modules (LoRa, Sigfox). The device's low-power modes enable battery-powered operation for years, with the ability to wake on external interrupts or RTC alarms. The 12-bit ADC and comparators can be used for threshold-based sensing, reducing processor wake-ups. The STM32L031K6T6's robust operating temperature range (-40C to +85C) suits outdoor environments. Designers can leverage the hardware oversampling to improve ADC resolution for accurate measurements, and the flexible clocking system allows optimization between speed and power.
Được đề xuất
Portable Medical Device
The STM32L031K6T6 is well-suited for portable medical devices like glucose meters and pulse oximeters. Its ultra-low power consumption ensures long battery life, critical for patient convenience. The integrated 12-bit DAC and comparators enable analog signal conditioning, while the ADC with oversampling provides high-resolution measurements. The device's small LQFP-32 package allows compact PCB designs, and the wide supply voltage range accommodates various battery chemistries. In a typical glucose meter, the MCU reads the sensor via ADC, processes the data, and displays results on an LCD or sends via UART to a smartphone. The low-power modes allow the device to remain in standby between measurements, drawing only microamps.
Được đề xuất
Industrial Monitoring System
The STM32L031K6T6 can be used in industrial monitoring systems for data acquisition and control. Its robust operating temperature range and wide supply voltage make it suitable for harsh environments. The device's multiple timers and communication interfaces enable interfacing with industrial sensors and actuators. The 12-bit ADC can sample analog signals from pressure or temperature transducers, and the USART can communicate with a central PLC or gateway. The low-power modes are beneficial for battery-backed monitoring stations. Designers can use the low-power timer to periodically wake the system for measurements, reducing energy consumption. The STM32L031K6T6's rich peripheral set allows for a compact, cost-effective design.
Được đề xuất
IoT Edge Node
The STM32L031K6T6 is an excellent choice for IoT edge nodes that require local processing and low power. It can collect data from sensors, perform basic processing, and transmit via a wireless module. The device's ultra-low-power modes allow battery-powered operation for extended periods. The communication interfaces (I2C, SPI, USART) enable connection to various sensors and radios. The 12-bit ADC is useful for reading analog sensors, and the comparators can be used for wake-up on threshold events. The STM32L031K6T6's small package and low cost make it ideal for mass-deployed IoT devices. Designers can use the STOP mode with RTC to schedule periodic transmissions, minimizing power consumption.
Được đề xuất
Battery Management System
The STM32L031K6T6 can be used in battery management systems (BMS) for monitoring and protection. Its low-power operation is crucial for minimizing self-discharge of the battery pack. The 12-bit ADC can measure cell voltages and currents, while the comparators can trigger protection interrupts on overvoltage or undervoltage. The device's communication interfaces allow reporting to a host controller. The wide supply voltage range (1.8V-3.6V) is compatible with typical battery voltages. The STM32L031K6T6's low-power modes enable the BMS to remain in standby when not actively monitoring, extending battery life. The LQFP-32 package is suitable for compact BMS PCBs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho STM32L031K6T6 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | STM32L031K4T6 | STM32L031K8T6 | STM32L051K6T6 | STM32L071K6T6 |
|---|---|---|---|---|---|
| Package | LQFP-32 | LQFP-32 | LQFP-32 | LQFP-32 | LQFP-32 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Flash Memory | 32 KB | 16 KB | 64 KB | 32 KB | 192 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 20 KB |
| Max Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Standby Current | 0.29 uA | 0.29 uA | 0.29 uA | 0.29 uA | 0.29 uA |
| True EEPROM | No | No | No | Yes | Yes |
Bảo phân biệt quan trọng
- Ultra-low standby current of 0.29 uA with RTC (vsSTM32L051K6T6)
- 32 KB Flash in a cost-optimized package (vsSTM32L031K4T6)
- Pin-compatible with higher-memory variants (vsSTM32L031K8T6)
Ghi chú thiết kế
For ultra-low-power operation, use the STOP mode with RTC to achieve 0.29 uA standby current. Ensure all unused GPIOs are configured as analog inputs to prevent leakage. Decouple each VDD pin with a 100nF capacitor and add a 1uF capacitor on the main supply. Use the internal 16 MHz RC oscillator for fast wake-up, or an external 32.768 kHz crystal for accurate RTC timing.
Place the decoupling capacitors as close as possible to the VDD and VDDA pins. For the LQFP-32 package, ensure a solid ground plane under the device. If using the ADC, separate analog and digital ground planes and connect them at a single point. Keep the crystal oscillator traces short and shielded to avoid noise coupling.
Do not exceed the absolute maximum ratings: supply voltage 3.6V and input voltage on any pin up to VDD+0.3V. When programming the Flash, ensure the supply voltage is within the specified range (2.0V-3.6V for write/erase). Also, be aware that the BOOT0 pin (PB2) must be pulled low for normal boot from Flash; a floating BOOT0 can cause unexpected boot behavior.
Thông tin tuân thủ
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified; for automotive, consider STM32L0 series with -Q suffix.
