STM32L072RBT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
料号： STM32L072RBT6 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.88 | $2,880.00 |
STM32L072RBT6 概述
An ultra-low-power microcontroller (MCU) is a system-on-chip that combines a processor core, memory, and peripherals while minimizing power consumption to extend battery life. The STM32L0 series is part of the STM32 family, which spans from entry-level Cortex-M0+ to high-performance Cortex-M7 devices. Within the power management hierarchy, these MCUs are designed for applications where energy efficiency is paramount, such as IoT sensors, wearables, and industrial monitoring.
Key features include multiple low-power modes (Sleep, Low-power Run, Low-power Sleep, Stop with RTC, Standby with RTC, and Shutdown), a 12-bit ADC with hardware oversampling, a 12-bit DAC, two comparators, and an ultra-low-power timer. The device also integrates a USB 2.0 full-speed crystal-less interface, an LCD driver supporting up to 8x40 segments, and a true random number generator (TRNG). The operating voltage range is 1.8V to 3.6V, with a typical current consumption of 84 uA/MHz in Run mode and 0.29 uA in Standby mode with RTC.
The STM32L072RBT6 is built on ST's ultra-low-power technology, featuring a flexible clocking scheme with an internal 16 MHz RC oscillator, an external 32.768 kHz crystal for RTC, and a PLL for higher frequencies. The device supports a wide range of communication interfaces including I2C, SPI, USART, and LPUART, enabling seamless connectivity in sensor networks. The integrated LCD driver and USB interface reduce external component count, simplifying board design.
Typical applications include smart meters, medical devices, fitness trackers, wireless sensor nodes, and industrial process control. The ultra-low-power modes allow the MCU to operate for years on a single coin-cell battery, making it a preferred choice for IoT edge devices.
When designing with this MCU, careful attention to the power supply decoupling and the selection of the appropriate low-power mode is essential to achieve the lowest possible energy consumption. The use of the internal RC oscillator can save cost, but for time-critical applications, an external crystal is recommended.
直接替换替代料： STM32L072RBT6 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： STM32L072RBT6 （相同外形与封装尺寸） ——差异在于 ADC, DAC, Package, RTC, Supply Voltage Range.
快速对比工具——选择替代料号进行并排对比：
STM32L072RZT6
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STM32L071RBT6
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STM32L073RZT6
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.11 / 个
查看数据手册 →STM32L072RBT6TR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STM32L072RBT6D
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STM32L072RBT6 最大额定值与电气特性
| Core | ARM Cortex-M0+ |
| Max Clock Speed | 32 MHz |
| Flash Memory | 128 KB |
| SRAM | 20 KB |
| Operating Voltage | 1.8 V to 3.6 V |
| GPIO Pins | 51 |
| ADC Resolution | 12-bit |
| ADC Channels | 16 |
| DAC Resolution | 12-bit |
| DAC Channels | 2 |
| Communication Interfaces | I2C, SPI, USART, LPUART, USB 2.0 |
| Timers | 8 (including low-power timer) |
| 封装 | LQFP-64 |
| 工作温度 | -40C to +85C |
| Supply Current (Run mode) | 84 uA/MHz |
| Standby Current (with RTC) | 0.29 uA |
STM32L072RBT6 引脚配置
| 引脚 1 | VBAT — Battery backup supply for RTC |
| 引脚 2 | PC13 — GPIO or TAMPER |
| 引脚 3 | PC14 — GPIO or OSC32_IN |
| 引脚 4 | PC15 — GPIO or OSC32_OUT |
| 引脚 5 | PF0 — GPIO or OSC_IN |
| 引脚 6 | PF1 — GPIO or OSC_OUT |
| 引脚 7 | NRST — Reset (active low) |
| 引脚 8 | VDD — Power supply |
| 引脚 9 | VSS — Ground |
| 引脚 10 | VDDA — Analog power supply |
| 引脚 11 | PA0 — GPIO/ADC_IN0 |
| 引脚 12 | PA1 — GPIO/ADC_IN1 |
| 引脚 13 | PA2 — GPIO/USART2_TX |
| 引脚 14 | PA3 — GPIO/USART2_RX |
| 引脚 15 | PA4 — GPIO/SPI1_NSS |
| 引脚 16 | PA5 — GPIO/SPI1_SCK |
| 引脚 17 | PA6 — GPIO/SPI1_MISO |
| 引脚 18 | PA7 — GPIO/SPI1_MOSI |
| 引脚 19 | PB0 — GPIO/ADC_IN8 |
| 引脚 20 | PB1 — GPIO/ADC_IN9 |
| 引脚 21 | PB2 — GPIO/BOOT1 |
| 引脚 22 | PB10 — GPIO/I2C2_SCL |
| 引脚 23 | PB11 — GPIO/I2C2_SDA |
| 引脚 24 | PB12 — GPIO/SPI2_NSS |
| 引脚 25 | PB13 — GPIO/SPI2_SCK |
| 引脚 26 | PB14 — GPIO/SPI2_MISO |
| 引脚 27 | PB15 — GPIO/SPI2_MOSI |
| 引脚 28 | PC6 — GPIO/USART6_TX |
| 引脚 29 | PC7 — GPIO/USART6_RX |
| 引脚 30 | PC8 — GPIO |
| 引脚 31 | PC9 — GPIO |
| 引脚 32 | PD2 — GPIO |
| 引脚 33 | PH0 — GPIO/OSC_IN |
| 引脚 34 | PH1 — GPIO/OSC_OUT |
| 引脚 35 | PB3 — GPIO/SPI1_SCK |
| 引脚 36 | PB4 — GPIO/SPI1_MISO |
| 引脚 37 | PB5 — GPIO/I2C1_SMBA |
| 引脚 38 | PB6 — GPIO/I2C1_SCL |
| 引脚 39 | PB7 — GPIO/I2C1_SDA |
| 引脚 40 | BOOT0 — Boot mode selection |
| 引脚 41 | PB8 — GPIO/I2C1_SCL |
| 引脚 42 | PB9 — GPIO/I2C1_SDA |
| 引脚 43 | PA8 — GPIO/USART1_CK |
| 引脚 44 | PA9 — GPIO/USART1_TX |
| 引脚 45 | PA10 — GPIO/USART1_RX |
| 引脚 46 | PA11 — GPIO/USB_DM |
| 引脚 47 | PA12 — GPIO/USB_DP |
| 引脚 48 | PA13 — GPIO/SWDIO |
| 引脚 49 | PA14 — GPIO/SWCLK |
| 引脚 50 | PA15 — GPIO/SPI1_NSS |
| 引脚 51 | PC10 — GPIO/USART4_TX |
| 引脚 52 | PC11 — GPIO/USART4_RX |
| 引脚 53 | PC12 — GPIO/USART5_TX |
| 引脚 54 | PD0 — GPIO/OSC_IN |
| 引脚 55 | PD1 — GPIO/OSC_OUT |
| 引脚 56 | PD3 — GPIO |
| 引脚 57 | PD4 — GPIO |
| 引脚 58 | PD5 — GPIO |
| 引脚 59 | PD6 — GPIO |
| 引脚 60 | PD7 — GPIO |
| 引脚 61 | PE0 — GPIO |
| 引脚 62 | PE1 — GPIO |
| 引脚 63 | VDD — Power supply |
| 引脚 64 | VSS — Ground |
典型应用
STM32L072RBT6 适用于 6 应用s: IoT Sensor Nodes, Smart Meters, Wearable Fitness Trackers, Medical Devices, Industrial Process Control, Smart Home Devices.
IoT Sensor Nodes
The STM32L072RBT6 is ideal for IoT sensor nodes due to its ultra-low-power consumption and multiple communication interfaces. In a typical application, the MCU wakes up periodically from Stop mode to read sensors via I2C or SPI, process data, and transmit via LPUART or a sub-GHz radio. The 0.29 uA standby current with RTC ensures long battery life, while the 12-bit ADC with hardware oversampling provides accurate sensor readings. The integrated USB interface allows for easy firmware updates and data logging. Compared to higher-power MCUs, the STM32L072RBT6 extends battery life by up to 10x in duty-cycled applications.
推荐
Smart Meters
Smart meters require reliable, low-power operation over many years. The STM32L072RBT6's ultra-low-power modes and integrated LCD driver make it suitable for displaying consumption data. The 12-bit ADC can measure voltage and current with high accuracy, while the multiple timers enable precise pulse counting. The device's wide operating voltage range (1.8V-3.6V) accommodates battery or energy-harvesting power sources. The standby current of 0.29 uA ensures minimal power draw during idle periods, extending battery life to 10+ years in typical metering applications.
推荐
Wearable Fitness Trackers
Wearable devices demand ultra-low power and small form factor. The STM32L072RBT6's 32 MHz Cortex-M0+ core provides sufficient processing for sensor fusion algorithms, while its low-power modes allow the device to run for weeks on a small battery. The integrated DAC can drive haptic actuators, and the USB interface enables charging and data transfer. The device's 1.8V operation is compatible with single-cell batteries, and the 20 KB SRAM is adequate for buffering sensor data. The low-power timer can wake the MCU periodically to sample accelerometer data, minimizing power consumption.
推荐
Medical Devices
In medical devices such as glucose monitors and pulse oximeters, the STM32L072RBT6 provides reliable, low-power operation. The 12-bit ADC with oversampling ensures accurate sensor readings, while the multiple communication interfaces allow data transfer to a host system. The device's low-power modes are critical for battery-operated devices that must last for months. The integrated TRNG can be used for security protocols, and the wide operating temperature range (-40C to +85C) ensures operation in various environments. The 128 KB Flash is sufficient for complex algorithms and data logging.
推荐
Industrial Process Control
The STM32L072RBT6 is suitable for industrial process control due to its robust communication interfaces and low-power operation. It can interface with sensors and actuators via UART, SPI, or I2C, and its multiple timers can generate PWM signals for motor control. The device's wide operating voltage range and temperature range make it suitable for harsh industrial environments. The low-power modes allow the system to conserve energy during idle periods, reducing overall power consumption. The integrated DAC can be used for analog output, and the ADC for monitoring process variables.
推荐
Smart Home Devices
Smart home devices such as thermostats and smart locks benefit from the STM32L072RBT6's low power and connectivity. The device can communicate via Zigbee, Z-Wave, or Bluetooth through external modules, while its low-power modes ensure long battery life. The integrated LCD driver can display status information, and the USB interface allows for easy configuration. The 12-bit ADC can monitor battery voltage, and the multiple timers can handle debouncing and timeouts. The device's small footprint and low cost make it ideal for mass-produced smart home products.
推荐
推荐产品汇总
工程参考数据： STM32L072RBT6 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | STM32L072RZT6 | STM32L071RBT6 | STM32L073RZT6 |
|---|---|---|---|---|
| Package | LQFP-64 | LQFP-64 | LQFP-64 | LQFP-64 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Flash Memory | 128 KB | 192 KB | 128 KB | 192 KB |
| SRAM | 20 KB | 20 KB | 20 KB | 20 KB |
| USB Interface | Yes | Yes | No | Yes |
| DAC | Yes (2 channels) | Yes (2 channels) | No | Yes (2 channels) |
| LCD Driver | Yes (8x40) | Yes (8x40) | No | Yes (8x40) |
| Standby Current (with RTC) | 0.29 uA | 0.29 uA | 0.29 uA | 0.29 uA |
关键差异点
- Integrated USB without external crystal （对比 STM32L071RBT6)
- Integrated LCD driver （对比 STM32L071RBT6)
- Higher Flash option available （对比 STM32L072RZT6)
设计说明
For ultra-low-power operation, use the appropriate low-power mode. In Standby mode with RTC, the current is 0.29 uA. Ensure that all unused GPIOs are configured as analog inputs or outputs to avoid floating inputs that increase leakage. Use the internal RC oscillator for cost savings, but for time-critical applications, use an external 32.768 kHz crystal for the RTC.
Place decoupling capacitors (100 nF) close to each VDD pin and a 4.7 uF capacitor on VDDA. For the USB interface, route the D+ and D- lines as a differential pair with controlled impedance (90 ohms). Keep the crystal oscillator traces short and away from high-speed digital signals to minimize noise.
Do not exceed the absolute maximum ratings, especially on the VBAT pin. When using the internal LCD driver, ensure the LCD voltage is within the specified range. For firmware, enable the brown-out reset (BOR) to prevent erratic behavior during power supply dips. Also, configure the GPIOs correctly to avoid excessive current draw.
合规信息
STMicroelectronics products are RoHS compliant and lead-free. AEC-Q100 qualification is not applicable for this standard-grade MCU.
