STM32L071CBT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
N.º da peça: STM32L071CBT6 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.42 | $3,42 |
| 10 | $3.08 | $30,80 |
| 100 | $2.74 | $274,00 |
| 500 | $2.46 | $1.230,00 |
| 1.000 | $2.19 | $2.190,00 |
STM32L071CBT6 Visão geral
An ultra-low-power microcontroller (MCU) is a type of integrated circuit that combines a processor core, memory, and peripherals on a single chip, optimized for minimal power consumption. The STM32L0 series is part of the broader STM32 family, which includes various ARM Cortex-M based MCUs. These devices are essential in embedded systems where energy efficiency is critical, such as IoT devices, wearables, and industrial sensors. The STM32L071CBT6 sits within the STM32L0 category, which is known for its low-power modes and high integration.
Key features of the STM32L071CBT6 include multiple low-power modes (Sleep, Low-power run, Low-power sleep, Stop with RTC, Stop without RTC, Standby with RTC, Standby without RTC), a 12-bit ADC with hardware oversampling, a 12-bit DAC, two comparators, and a wide range of communication interfaces including I2C, SPI, USART, and LPUART. The device also integrates a USB 2.0 full-speed device controller, a real-time clock (RTC) with calendar, and a true random number generator (TRNG).
The STM32L071CBT6 is built on STMicroelectronics' ultra-low-power technology, which enables a dynamic current consumption as low as 87 uA/MHz in Run mode and 0.4 uA in Standby mode with RTC. This makes it ideal for applications that require long battery life, such as smart meters, medical devices, and wireless sensor nodes. The device also supports a wide supply voltage range from 1.65V to 3.6V, allowing operation from a single coin cell battery.
Typical applications include IoT edge nodes, portable medical devices, smart home sensors, and industrial monitoring systems. The rich set of analog peripherals and communication interfaces makes it a versatile choice for many embedded designs.
When designing with the STM32L071CBT6, it is important to consider the power supply decoupling and the use of the low-power modes to maximize battery life. The device supports a flexible clocking scheme with an internal 16 MHz RC oscillator, an external crystal oscillator, and a PLL. Proper PCB layout with short, low-inductance traces for the crystal and decoupling capacitors is recommended for reliable operation.
Alternativas drop-in para STM32L071CBT6 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com STM32L071CBT6 (mesmo formato e footprint) — diferindo em ADC, Core, Flash Memory, Package, Communication Interfaces.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
STM32L071C8T6
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
STM32L071CZT6
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
STM32L071CBT6TR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
STM32L071CBT6 Classificações máximas e características elétricas
| Core | ARM Cortex-M0+ |
| Maximum Frequency | 32 MHz |
| Flash Memory | 128 KB |
| SRAM | 20 KB |
| Supply Voltage Range | 1.65 V to 3.6 V |
| Encapsulamento | LQFP-48 (7x7 mm) |
| Faixa de temperatura de operação | -40C to +85C |
| ADC | 12-bit, 16 channels, with hardware oversampling |
| DAC | 12-bit, 1 channel |
| Comparators | 2 |
| Communication Interfaces | I2C, SPI, USART, LPUART, USB 2.0 FS |
| RTC | Yes, with calendar |
| TRNG | Yes |
| Low-Power Modes | Sleep, Low-power run, Low-power sleep, Stop, Standby |
| Dynamic Current Consumption | 87 uA/MHz in Run mode |
| Standby Current | 0.4 uA with RTC |
| Status RoHS | Compliant |
Configuração de pinos do STM32L071CBT6
| Pino 1 | VBAT — Battery backup supply for RTC and backup registers |
| Pino 2 | PC14 — GPIO or OSC32_IN |
| Pino 3 | PC15 — GPIO or OSC32_OUT |
| Pino 4 | OSC_IN — External clock input |
| Pino 5 | OSC_OUT — External clock output |
| Pino 6 | NRST — Reset (active low) |
| Pino 7 | VSSA — Analog ground |
| Pino 8 | VDDA — Analog power supply |
| Pino 9 | PA0 — GPIO/ADC_IN0 |
| Pino 10 | PA1 — GPIO/ADC_IN1 |
| Pino 11 | PA2 — GPIO/ADC_IN2/USART2_TX |
| Pino 12 | PA3 — GPIO/ADC_IN3/USART2_RX |
| Pino 13 | PA4 — GPIO/ADC_IN4/DAC_OUT1 |
| Pino 14 | PA5 — GPIO/ADC_IN5/SPI1_SCK |
| Pino 15 | PA6 — GPIO/ADC_IN6/SPI1_MISO |
| Pino 16 | PA7 — GPIO/ADC_IN7/SPI1_MOSI |
| Pino 17 | PB0 — GPIO/ADC_IN8 |
| Pino 18 | PB1 — GPIO/ADC_IN9 |
| Pino 19 | PB2 — GPIO/BOOT1 |
| Pino 20 | PB10 — GPIO/I2C2_SCL |
| Pino 21 | PB11 — GPIO/I2C2_SDA |
| Pino 22 | VSS — Ground |
| Pino 23 | VDD — Power supply |
| Pino 24 | PB12 — GPIO/SPI2_NSS |
| Pino 25 | PB13 — GPIO/SPI2_SCK |
| Pino 26 | PB14 — GPIO/SPI2_MISO |
| Pino 27 | PB15 — GPIO/SPI2_MOSI |
| Pino 28 | PA8 — GPIO/MCO |
| Pino 29 | PA9 — GPIO/USART1_TX |
| Pino 30 | PA10 — GPIO/USART1_RX |
| Pino 31 | PA11 — GPIO/USB_DM |
| Pino 32 | PA12 — GPIO/USB_DP |
| Pino 33 | PA13 — GPIO/SWDIO |
| Pino 34 | PA14 — GPIO/SWCLK |
| Pino 35 | PA15 — GPIO/SPI1_NSS |
| Pino 36 | PB3 — GPIO/SPI1_SCK |
| Pino 37 | PB4 — GPIO/SPI1_MISO |
| Pino 38 | PB5 — GPIO/SPI1_MOSI |
| Pino 39 | PB6 — GPIO/I2C1_SCL |
| Pino 40 | PB7 — GPIO/I2C1_SDA |
| Pino 41 | BOOT0 — Boot mode selection |
| Pino 42 | PB8 — GPIO/I2C1_SCL |
| Pino 43 | PB9 — GPIO/I2C1_SDA |
| Pino 44 | VSS — Ground |
| Pino 45 | VDD — Power supply |
| Pino 46 | PC13 — GPIO/RTC_TAMP1 |
| Pino 47 | PC14 — GPIO/OSC32_IN |
| Pino 48 | PC15 — GPIO/OSC32_OUT |
Aplicações típicas
STM32L071CBT6 é adequado para 6 aplicaçãos: IoT Edge Nodes, Portable Medical Devices, Smart Home Sensors, Industrial Monitoring, Wearable Devices, Smart Meters.
IoT Edge Nodes
The STM32L071CBT6 is ideal for IoT edge nodes that require ultra-low power consumption and long battery life. Its low-power modes, including standby current of 0.4 uA, allow devices to operate for years on a single coin cell battery. The integrated LPUART, I2C, and SPI interfaces enable seamless connectivity to sensors and wireless modules. The 12-bit ADC with hardware oversampling provides accurate sensor data acquisition, while the wide supply voltage range (1.65V to 3.6V) ensures compatibility with various battery chemistries. In a typical IoT edge node, the MCU wakes up periodically from standby, reads sensor data, processes it, and transmits it via a wireless module, then returns to standby. The low dynamic current of 87 uA/MHz ensures efficient operation during active periods. Designers should optimize the duty cycle to maximize battery life, and use the RTC to schedule wake-ups.
Recomendado
Portable Medical Devices
The STM32L071CBT6 is well-suited for portable medical devices such as glucose meters, pulse oximeters, and wearable health monitors. Its ultra-low-power consumption extends battery life, which is critical for patient convenience and compliance. The integrated 12-bit ADC and comparators enable precise analog signal conditioning for biosensors. The USB 2.0 full-speed interface allows easy data transfer to a PC or smartphone for analysis. The device's wide supply voltage range supports operation from a single 3V lithium battery. In a typical pulse oximeter, the MCU controls an LED driver, reads the photodetector signal via the ADC, calculates oxygen saturation, and displays the result on an LCD. The low-power modes allow the device to remain in standby between measurements, conserving battery. Designers should ensure proper isolation and noise filtering for medical-grade accuracy, and comply with relevant medical standards such as IEC 60601.
Recomendado
Smart Home Sensors
The STM32L071CBT6 is perfect for smart home sensors like motion detectors, door/window sensors, and environmental monitors. Its ultra-low-power consumption allows battery-powered operation for years, reducing maintenance costs. The device's multiple low-power modes enable the sensor to sleep most of the time and wake up only when an event occurs. The integrated RTC can schedule periodic measurements, and the GPIO interrupts can wake the MCU from standby when a sensor triggers. The I2C and SPI interfaces connect to various sensors, such as temperature, humidity, and motion sensors. The 12-bit ADC can read analog sensors like light-dependent resistors. In a typical smart home sensor, the MCU stays in standby mode, consuming only 0.4 uA, and wakes up on an external interrupt to read the sensor and transmit data via a wireless module. Designers should consider the power consumption of the wireless module and use duty cycling to minimize overall energy usage.
Recomendado
Industrial Monitoring
The STM32L071CBT6 is suitable for industrial monitoring applications such as predictive maintenance, process control, and asset tracking. Its robust design, wide operating temperature range (-40C to +85C), and low-power consumption make it ideal for remote sensors in harsh environments. The device's multiple communication interfaces (USART, SPI, I2C) allow connection to industrial protocols like Modbus. The 12-bit ADC with hardware oversampling provides accurate measurement of analog signals from sensors like vibration, temperature, and pressure. The low-power modes enable battery-powered wireless sensor nodes that can operate for years. In a typical industrial monitoring node, the MCU periodically samples a sensor, processes the data, and sends it to a central controller via a wireless link. The device's TRNG can be used for secure communication. Designers should ensure proper EMC protection and consider using the device's brown-out reset to maintain reliable operation in noisy environments.
Recomendado
Wearable Devices
The STM32L071CBT6 is an excellent choice for wearable devices like fitness trackers, smartwatches, and health monitors. Its ultra-low-power consumption is essential for small batteries, and its small LQFP-48 package fits compact PCB designs. The device's integrated USB 2.0 FS allows easy charging and data transfer. The 12-bit ADC and comparators can interface with various biometric sensors, such as heart rate monitors and skin conductance sensors. The low-power modes enable the device to run for days or weeks on a single charge. In a typical fitness tracker, the MCU collects accelerometer data, processes steps, and displays information on an OLED display. The device can enter standby mode when not in use, waking up periodically to update the display or log data. Designers should optimize the firmware to minimize active time and use the RTC for scheduling, ensuring the device meets battery life expectations.
Recomendado
Smart Meters
The STM32L071CBT6 is well-suited for smart metering applications such as electricity, water, and gas meters. Its ultra-low-power consumption allows battery-powered operation for many years, which is crucial for meters that are not easily accessible. The device's multiple communication interfaces (USART, SPI, I2C) support various metering protocols, and the LPUART can interface with wireless modules for remote reading. The 12-bit ADC with hardware oversampling provides accurate measurement of analog signals from current and voltage sensors. The RTC with calendar ensures accurate time-stamping of consumption data. In a typical smart meter, the MCU periodically reads the sensor, calculates consumption, and stores data in Flash. It can wake up on a schedule to transmit data via a wireless link. The low-power modes allow the meter to operate for over 10 years on a single battery. Designers should consider the accuracy requirements and use external references if needed.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para STM32L071CBT6 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | STM32L071C8T6 | STM32L071CZT6 | STM32L071CBT6TR | STM32L071RBT6 | LPC824M201JHI33 |
|---|---|---|---|---|---|---|
| Package | LQFP-48 | LQFP-48 | LQFP-48 | LQFP-48 | LQFP-64 | HVQFN-32 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | NXP Semiconductors |
| Flash Memory | 128 KB | 64 KB | 192 KB | 128 KB | 128 KB | 32 KB |
| SRAM | 20 KB | 20 KB | 20 KB | 20 KB | 20 KB | 8 KB |
| Maximum Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 30 MHz |
| Supply Voltage Range | 1.65V to 3.6V | 1.65V to 3.6V | 1.65V to 3.6V | 1.65V to 3.6V | 1.65V to 3.6V | 1.8V to 3.6V |
| USB Interface | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | No |
| Standby Current (with RTC) | 0.4 uA | 0.4 uA | 0.4 uA | 0.4 uA | 0.4 uA | 0.5 uA |
Principais diferenciais
- Ultra-low-power consumption with standby current of 0.4 uA (vs LPC824M201JHI33)
- Integrated USB 2.0 full-speed device controller (vs LPC824M201JHI33)
- Larger Flash memory options in the same package (vs STM32L071C8T6)
Notas de projeto
The STM32L071CBT6 operates from 1.65V to 3.6V. Use a low-dropout regulator (LDO) to provide a stable supply if the input voltage exceeds 3.6V. Place a 100nF decoupling capacitor close to each VDD pin and a 1uF capacitor at the main VDD input. For battery-powered designs, consider using the VBAT pin for backup power to the RTC, allowing the main supply to be disconnected while preserving timekeeping.
For reliable operation, ensure a solid ground plane and short, low-inductance traces for the crystal oscillator (OSC_IN/OSC_OUT). Place the crystal and load capacitors as close to the MCU as possible. For the USB interface, route the D+ and D- traces as a differential pair with controlled impedance (90 ohms) and place a 1.5k pull-up resistor on D+ as required by USB 2.0 FS.
Do not exceed the absolute maximum ratings, especially the supply voltage (3.6V) and the voltage on any GPIO pin (VDD+0.3V). Ensure the BOOT0 pin is properly configured to avoid unintended boot mode. When using the ADC, avoid floating input pins by configuring them as analog inputs and connecting them to a known potential. Also, note that the internal RC oscillator has limited accuracy; use an external crystal for applications requiring precise timing.
Informações de conformidade
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified; for automotive, consider STM32L0 series with AEC-Q100 qualification if available.
