STM32L433RCT6 - Ultra-Low-Power ARM Cortex-M4 MCU | STMicroelectronics
MPN： STM32L433RCT6 ✓ 啟用中STM32L433RCT6 概覽
What is an ARM Cortex-M4 microcontroller? It is a 32-bit processor core designed for embedded systems, offering a balance of performance, power efficiency, and rich peripheral integration. The Cortex-M4 includes a floating-point unit (FPU) and DSP instructions, making it suitable for signal processing and control applications. In the system hierarchy, a microcontroller (MCU) integrates a processor core, memory, and programmable peripherals on a single chip, enabling standalone operation in embedded designs.
Key features of the STM32L433RCT6 include an ultra-low-power mode with current consumption as low as 100 nA in standby mode, a 12-bit ADC with hardware oversampling, a 12-bit DAC, multiple communication interfaces (USART, SPI, I2C, USB), and a real-time clock (RTC). The device also integrates a flexible power management unit with multiple low-power modes, including Sleep, Low-power Run, and Stop modes, allowing designers to optimize energy consumption for their specific application.
Technically, the STM32L433RCT6 is built on ST's advanced 40 nm process technology, which contributes to its low power consumption. The Cortex-M4 core with FPU accelerates mathematical computations, while the ART Accelerator enables zero-wait-state execution from flash memory, improving overall system performance. The device supports a wide operating voltage range from 1.71 V to 3.6 V, making it compatible with standard battery chemistries.
Typical applications include smart meters, wearable devices, medical monitoring equipment, industrial sensors, and IoT nodes. Its ultra-low-power features make it ideal for battery-powered devices that require long operational lifetimes, such as wireless sensor networks and portable health monitors.
When designing with this MCU, careful attention should be paid to power supply decoupling and PCB layout to minimize noise and ensure reliable operation. The device's multiple low-power modes require proper configuration of wake-up sources and clock sources to achieve optimal energy savings.
直接替換替代品，適用於 STM32L433RCT6 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： STM32L433RCT6 （相同外形與佔位） — 差異在於 Package, ADC, DAC, SRAM, Communication Interfaces.
STM32L433RCT6TR
✅ 直接替換📋 參考替代品（不在目錄中）
STM32L433RCT6P
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM32L433RCT6Q
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM32L432RCT6
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM32L431RCT6
✅ 直接替換 ⚠️ 規格未經驗證✗ 缺貨
$8.5909 / 單位
查看資料表 →LPC845
⚡ 相同封裝 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
RA2A1
⚡ 相同封裝 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM32L433RCT6 最大額定值與電氣特性
| Core | ARM Cortex-M4 with FPU |
| Maximum Frequency | 80 MHz |
| Flash Memory | 256 KB |
| SRAM | 64 KB |
| 封裝 | LQFP64 |
| Operating Voltage | 1.71 V to 3.6 V |
| Standby Current | 100 nA |
| ADC | 12-bit with hardware oversampling |
| DAC | 12-bit |
| Communication Interfaces | USART, SPI, I2C, USB |
| Real-Time Clock | Yes |
| Process Technology | 40 nm |
| 工作溫度 | -40C to +85C |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
STM32L433RCT6 腳位配置
| 腳位 1 | VBAT — Battery backup supply for RTC |
| 腳位 2 | PC14 — GPIO / OSC32_IN |
| 腳位 3 | PC15 — GPIO / OSC32_OUT |
| 腳位 4 | PF0 — GPIO / OSC_IN |
| 腳位 5 | PF1 — GPIO / OSC_OUT |
| 腳位 6 | NRST — Reset (active low) |
| 腳位 7 | PC0 — GPIO / ADC_IN10 |
| 腳位 8 | PC1 — GPIO / ADC_IN11 |
| 腳位 9 | PC2 — GPIO / ADC_IN12 |
| 腳位 10 | PC3 — GPIO / ADC_IN13 |
| 腳位 11 | VDD — Digital power supply |
| 腳位 12 | VSS — Ground |
| 腳位 13 | PC4 — GPIO / ADC_IN14 |
| 腳位 14 | PC5 — GPIO / ADC_IN15 |
| 腳位 15 | PB0 — GPIO / ADC_IN8 |
| 腳位 16 | PB1 — GPIO / ADC_IN9 |
| 腳位 17 | PB2 — GPIO / BOOT1 |
| 腳位 18 | PB10 — GPIO / I2C2_SCL |
| 腳位 19 | PB11 — GPIO / I2C2_SDA |
| 腳位 20 | VDD — Digital power supply |
| 腳位 21 | VSS — Ground |
| 腳位 22 | PB12 — GPIO / SPI2_NSS |
| 腳位 23 | PB13 — GPIO / SPI2_SCK |
| 腳位 24 | PB14 — GPIO / SPI2_MISO |
| 腳位 25 | PB15 — GPIO / SPI2_MOSI |
| 腳位 26 | PC6 — GPIO / USART6_TX |
| 腳位 27 | PC7 — GPIO / USART6_RX |
| 腳位 28 | PC8 — GPIO / USART6_CK |
| 腳位 29 | PC9 — GPIO / USART6_CTS |
| 腳位 30 | PA0 — GPIO / ADC_IN0 / WKUP1 |
| 腳位 31 | PA1 — GPIO / ADC_IN1 |
| 腳位 32 | PA2 — GPIO / ADC_IN2 / USART2_TX |
| 腳位 33 | PA3 — GPIO / ADC_IN3 / USART2_RX |
| 腳位 34 | VDD — Digital power supply |
| 腳位 35 | VSS — Ground |
| 腳位 36 | PA4 — GPIO / ADC_IN4 / DAC_OUT1 |
| 腳位 37 | PA5 — GPIO / ADC_IN5 / DAC_OUT2 |
| 腳位 38 | PA6 — GPIO / ADC_IN6 |
| 腳位 39 | PA7 — GPIO / ADC_IN7 |
| 腳位 40 | PC10 — GPIO / USART4_TX |
| 腳位 41 | PC11 — GPIO / USART4_RX |
| 腳位 42 | PC12 — GPIO / USART5_TX |
| 腳位 43 | PD2 — GPIO / USART5_RX |
| 腳位 44 | PB3 — GPIO / SPI1_SCK |
| 腳位 45 | PB4 — GPIO / SPI1_MISO |
| 腳位 46 | PB5 — GPIO / SPI1_MOSI |
| 腳位 47 | PB6 — GPIO / I2C1_SCL |
| 腳位 48 | PB7 — GPIO / I2C1_SDA |
| 腳位 49 | BOOT0 — Boot mode selection |
| 腳位 50 | PB8 — GPIO / I2C1_SCL |
| 腳位 51 | PB9 — GPIO / I2C1_SDA |
| 腳位 52 | VDD — Digital power supply |
| 腳位 53 | VSS — Ground |
| 腳位 54 | PA8 — GPIO / USB_OTG_FS_SOF |
| 腳位 55 | PA9 — GPIO / USB_OTG_FS_VBUS |
| 腳位 56 | PA10 — GPIO / USB_OTG_FS_ID |
| 腳位 57 | PA11 — GPIO / USB_OTG_FS_DM |
| 腳位 58 | PA12 — GPIO / USB_OTG_FS_DP |
| 腳位 59 | PA13 — GPIO / SWDIO |
| 腳位 60 | PA14 — GPIO / SWCLK |
| 腳位 61 | PA15 — GPIO / JTDI |
| 腳位 62 | PB3 — GPIO / JTDO |
| 腳位 63 | PB4 — GPIO / NJTRST |
| 腳位 64 | VDD — Digital power supply |
典型應用
STM32L433RCT6 適用於 6 應用s: Smart Meters, Wearable Devices, Medical Monitoring Equipment, Industrial Sensors, IoT Nodes, Portable Health Monitors.
Smart Meters
The STM32L433RCT6 is ideal for smart meters due to its ultra-low power consumption and rich analog peripherals. Its 12-bit ADC with hardware oversampling enables accurate energy measurement, while the low-power modes extend battery life. The device can operate for years on a single battery, making it perfect for remote metering applications. The Cortex-M4 core with FPU handles complex metering algorithms efficiently, and the multiple communication interfaces (USART, SPI, I2C) allow connectivity with communication modules for data transmission. The wide operating voltage range (1.71 V to 3.6 V) ensures compatibility with various battery chemistries, and the 256 KB flash provides ample storage for metering data and firmware updates.
推薦
Wearable Devices
The STM32L433RCT6 is well-suited for wearable devices such as fitness trackers and smartwatches. Its ultra-low power consumption (100 nA standby) allows extended battery life, which is critical for wearables. The Cortex-M4 core with FPU enables efficient processing of sensor data, while the 12-bit ADC and DAC support analog sensor interfaces. The device's small LQFP64 package and wide operating voltage range make it easy to integrate into compact designs. The multiple low-power modes (Sleep, Low-power Run, Stop) allow the MCU to conserve energy when not actively processing, and the RTC enables timekeeping with minimal power draw. The USB interface supports charging and data transfer, and the SPI/I2C interfaces connect to sensors like accelerometers and heart rate monitors.
推薦
Medical Monitoring Equipment
The STM32L433RCT6 is suitable for medical monitoring devices such as portable ECG monitors and glucose meters. Its low power consumption ensures long battery life for portable devices, and the high-performance Cortex-M4 core with FPU handles real-time signal processing. The 12-bit ADC with oversampling provides high-resolution data acquisition for biosignals, and the DAC can generate analog output for stimulation or calibration. The device's reliability and wide operating temperature range (-40C to +85C) make it suitable for medical environments. The multiple communication interfaces (USART, SPI, I2C, USB) allow data transfer to external displays or computers, and the 256 KB flash provides ample storage for patient data and firmware. The RTC enables accurate time-stamping of medical events.
推薦
Industrial Sensors
The STM32L433RCT6 is ideal for industrial sensors that require low power and high reliability. Its ultra-low power modes allow battery-powered sensors to operate for years, and the wide operating voltage range (1.71 V to 3.6 V) ensures compatibility with industrial power supplies. The 12-bit ADC with oversampling enables precise measurement of analog signals from sensors like temperature, pressure, and flow. The Cortex-M4 core with FPU handles complex signal processing and calibration algorithms, while the multiple communication interfaces (USART, SPI, I2C) support wired or wireless connectivity. The device's robust design and wide temperature range make it suitable for harsh industrial environments. The 256 KB flash provides ample storage for sensor data and firmware updates.
推薦
IoT Nodes
The STM32L433RCT6 is a perfect choice for IoT nodes due to its ultra-low power consumption and rich connectivity options. The device can run on battery power for extended periods, making it ideal for wireless sensor networks. The Cortex-M4 core with FPU enables efficient processing of sensor data, and the multiple communication interfaces (USART, SPI, I2C, USB) allow connection to various wireless modules (LoRa, BLE, Wi-Fi). The low-power modes (Sleep, Stop) reduce energy consumption when the node is idle, and the RTC enables scheduled wake-ups. The 12-bit ADC and DAC support analog sensors and actuators, and the 256 KB flash provides ample storage for firmware and data. The wide operating voltage range ensures compatibility with battery chemistries.
推薦
Portable Health Monitors
The STM32L433RCT6 is well-suited for portable health monitors like pulse oximeters and blood pressure monitors. Its ultra-low power consumption extends battery life, and the high-performance Cortex-M4 core with FPU handles real-time signal processing. The 12-bit ADC with oversampling provides high-resolution data acquisition for biosignals, and the DAC can generate analog output for calibration. The device's small LQFP64 package and wide operating voltage range make it easy to integrate into handheld devices. The multiple communication interfaces (USART, SPI, I2C, USB) allow data transfer to smartphones or computers, and the 256 KB flash provides ample storage for patient data. The RTC enables accurate time-stamping of health measurements.
推薦
推薦產品摘要
工程參考資料，適用於 STM32L433RCT6 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | STM32L433RCT6TR | STM32L432RCT6 | STM32L431RCT6 | LPC845 | RA2A1 |
|---|---|---|---|---|---|---|
| Package | LQFP64 | LQFP64 | LQFP64 | LQFP64 | LQFP64 | LQFP64 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | NXP Semiconductors | Renesas Electronics |
| Core | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M0+ | ARM Cortex-M23 |
| Maximum Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 30 MHz | 48 MHz |
| Flash Memory | 256 KB | 256 KB | 128 KB | 128 KB | 64 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 16 KB | 32 KB |
| Standby Current | 100 nA | 100 nA | 100 nA | 100 nA | 1.5 uA | 300 nA |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
主要差異化特點
- Ultra-low standby current of 100 nA (對比LPC845)
- Higher flash memory of 256 KB (對比STM32L432RCT6)
- Cortex-M4 core with FPU (對比RA2A1)
設計說明
The STM32L433RCT6 operates from 1.71 V to 3.6 V. Use a low-dropout regulator (LDO) to provide a stable supply voltage. Decouple each VDD pin with a 100 nF ceramic capacitor and a 4.7 uF bulk capacitor. For the VBAT pin, connect a backup battery (e.g., CR2032) through a Schottky diode to prevent back-feeding. Ensure the power supply can handle peak currents during flash programming or high-frequency operation.
Place decoupling capacitors as close as possible to the VDD and VSS pins to minimize inductance. Use a solid ground plane to reduce noise and improve EMC performance. For the crystal oscillator pins (OSC_IN/OSC_OUT), keep traces short and shielded to avoid interference. Follow ST's layout guidelines in the datasheet for optimal performance.
Ensure the BOOT0 pin is properly configured to select the correct boot mode. If using the RTC, connect a 32.768 kHz crystal to OSC32_IN/OSC32_OUT and configure the RTC clock source. Do not exceed the absolute maximum ratings for VDD (3.6 V) and GPIO pins. When using the ADC, enable the internal voltage reference and calibrate the ADC for accurate readings.
合規資訊
RoHS and REACH compliant per STMicroelectronics product page. Not AEC-Q100 qualified.
