STM32L471RET6 - ARM Cortex-M4F 80MHz MCU | STMicroelectronics
MPN: STM32L471RET6 ✓ AktifSTM32L471RET6 Ringkasan
What is a microcontroller? A microcontroller (MCU) is a compact integrated circuit designed to govern a specific operation in an embedded system. It contains a processor core, memory (flash and SRAM), and programmable input/output peripherals on a single chip. Microcontrollers are the brains of countless electronic devices, from automotive engine control units to wearable health monitors. In the system hierarchy, a microcontroller is a type of embedded processor, which falls under the broader category of integrated circuits (ICs) and semiconductors. The STM32L471RET6 is a mid-range MCU in the STM32L4 family, positioned between the lower-power STM32L0/L1 series and the higher-performance STM32F4 series, offering a balance of energy efficiency and processing capability.
Key features of the STM32L471RET6 include its ultra-low-power modes (Sleep, Low-power run, Low-power sleep, Stop 0/1/2, Standby, and Shutdown) with current consumption as low as 100 nA in Shutdown mode. The device supports a wide supply voltage range of 1.71V to 3.6V, making it suitable for battery-powered applications. It also features a 12-bit ADC with hardware oversampling, a 12-bit DAC, and a true random number generator (TRNG). The FPU accelerates mathematical computations, which is beneficial for signal processing and control algorithms. The MCU is manufactured using ST's 90 nm process technology, enabling low dynamic power consumption.
Technical depth: The STM32L471RET6 is built around the ARM Cortex-M4F core with DSP instructions and a single-precision FPU. It includes a memory protection unit (MPU) for enhanced security and reliability. The device supports up to 8x32-bit timers, including a low-power timer (LPTIM) that can operate in Stop mode. Communication peripherals include 3x USART, 3x SPI, 3x I2C, 1x CAN, 1x USB OTG FS, and 1x SAI (serial audio interface). The ADC has a resolution of 12 bits with up to 16 external channels and can operate at up to 5 Msps. The DAC has two channels with 12-bit resolution. The device also includes a flexible memory controller (FMC) for external memory expansion, supporting SRAM, PSRAM, NOR, and NAND flash.
Typical applications include industrial sensors and actuators, smart meters, medical devices (e.g., glucose monitors, infusion pumps), wearable fitness trackers, IoT nodes, and portable instrumentation. The ultra-low-power modes and rich analog peripherals make it ideal for battery-operated devices that require long battery life and precise analog measurements. For example, in a smart meter, the STM32L471RET6 can handle metrology calculations, communication protocols, and display control while consuming minimal power in sleep mode between measurements.
Design consideration: When designing with the STM32L471RET6, pay attention to the power supply decoupling. Place a 100 nF ceramic capacitor close to each VDD pin and a 4.7 uF capacitor at the main power input. For the VDDA pin, use a dedicated 1 uF capacitor to ensure stable analog performance. Also, configure the clock system carefully: the device can run from an internal 16 MHz HSI oscillator, but for precise timing, use an external 8 MHz crystal with appropriate load capacitors. The boot pins (BOOT0 and BOOT1) must be set correctly for the desired boot mode (flash, system memory, or SRAM).
Alternatif penggantian untuk STM32L471RET6 — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian STM32L471RET6 (sama faktor bentuk dan footprint) — berbeda di dalam ADC Resolution, DAC Resolution, Flash Memory, Package.
STM32L471RGT6
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
STM32L476RGT6
✅ Drop-InKontak untuk harga
Lihat Datasheet →STM32L475RGT6
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
STM32L471RET6TR
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
GD32F450RET6
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
STM32L471RET6 Rating Maksimal & Karakteristik Listrik
| Core | ARM Cortex-M4F with FPU |
| Frekuensi Bawah Maximum | 80 MHz |
| Flash Memory | 512 KB |
| SRAM | 128 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| Paket | LQFP-64 (10x10 mm, 0.5 mm pitch) |
| Tipe Mounting | Surface Mount |
| ADC Resolution | 12-bit |
| ADC Channels | 16 external channels |
| DAC Resolution | 12-bit |
| DAC Channels | 2 |
| Communication Interfaces | 3x USART, 3x SPI, 3x I2C, 1x CAN, 1x USB OTG FS, 1x SAI |
| Timers | 8x 32-bit timers, 1x low-power timer |
| Rentang Suhu Kerja | -40C to +85C |
| Status RoHS | Compliant |
Konfigurasi Pin STM32L471RET6
| Pin produk 1 | VBAT — Battery backup supply for RTC and backup registers |
| Pin produk 2 | PC14 — GPIO or OSC32_IN |
| Pin produk 3 | PC15 — GPIO or OSC32_OUT |
| Pin produk 4 | PF0 — GPIO or OSC_IN |
| Pin produk 5 | PF1 — GPIO or OSC_OUT |
| Pin produk 6 | NRST — Reset (active low) |
| Pin produk 7 | PC0 — GPIO or ADC input |
| Pin produk 8 | PC1 — GPIO or ADC input |
| Pin produk 9 | PC2 — GPIO or ADC input |
| Pin produk 10 | PC3 — GPIO or ADC input |
| Pin produk 11 | VDD — Digital power supply |
| Pin produk 12 | VSS — Ground |
| Pin produk 13 | PA0 — GPIO or ADC input |
| Pin produk 14 | PA1 — GPIO or ADC input |
| Pin produk 15 | PA2 — GPIO or USART2_TX |
| Pin produk 16 | PA3 — GPIO or USART2_RX |
| Pin produk 17 | PA4 — GPIO or DAC_OUT1 |
| Pin produk 18 | PA5 — GPIO or DAC_OUT2 |
| Pin produk 19 | PA6 — GPIO or SPI1_MISO |
| Pin produk 20 | PA7 — GPIO or SPI1_MOSI |
| Pin produk 21 | PC4 — GPIO or ADC input |
| Pin produk 22 | PC5 — GPIO or ADC input |
| Pin produk 23 | PB0 — GPIO or ADC input |
| Pin produk 24 | PB1 — GPIO or ADC input |
| Pin produk 25 | PB2 — GPIO or BOOT1 |
| Pin produk 26 | PB10 — GPIO or I2C2_SCL |
| Pin produk 27 | PB11 — GPIO or I2C2_SDA |
| Pin produk 28 | VDD — Digital power supply |
| Pin produk 29 | VSS — Ground |
| Pin produk 30 | PB12 — GPIO or SPI2_NSS |
| Pin produk 31 | PB13 — GPIO or SPI2_SCK |
| Pin produk 32 | PB14 — GPIO or SPI2_MISO |
| Pin produk 33 | PB15 — GPIO or SPI2_MOSI |
| Pin produk 34 | PC6 — GPIO or USART6_TX |
| Pin produk 35 | PC7 — GPIO or USART6_RX |
| Pin produk 36 | PC8 — GPIO or USART3_TX |
| Pin produk 37 | PC9 — GPIO or USART3_RX |
| Pin produk 38 | PA8 — GPIO or USB_OTG_FS_SOF |
| Pin produk 39 | PA9 — GPIO or USB_OTG_FS_VBUS |
| Pin produk 40 | PA10 — GPIO or USB_OTG_FS_ID |
| Pin produk 41 | PA11 — GPIO or USB_OTG_FS_DM |
| Pin produk 42 | PA12 — GPIO or USB_OTG_FS_DP |
| Pin produk 43 | PA13 — GPIO or SWDIO |
| Pin produk 44 | PA14 — GPIO or SWCLK |
| Pin produk 45 | PA15 — GPIO or JTDI |
| Pin produk 46 | PC10 — GPIO or USART4_TX |
| Pin produk 47 | PC11 — GPIO or USART4_RX |
| Pin produk 48 | PC12 — GPIO or USART5_TX |
| Pin produk 49 | PD2 — GPIO or USART5_RX |
| Pin produk 50 | PB3 — GPIO or SPI1_SCK |
| Pin produk 51 | PB4 — GPIO or SPI1_NSS |
| Pin produk 52 | PB5 — GPIO or I2C1_SMBA |
| Pin produk 53 | PB6 — GPIO or I2C1_SCL |
| Pin produk 54 | PB7 — GPIO or I2C1_SDA |
| Pin produk 55 | BOOT0 — Boot mode selection |
| Pin produk 56 | PB8 — GPIO or CAN_RX |
| Pin produk 57 | PB9 — GPIO or CAN_TX |
| Pin produk 58 | VDD — Digital power supply |
| Pin produk 59 | VSS — Ground |
| Pin produk 60 | PC13 — GPIO or RTC_TAMP1 |
| Pin produk 61 | PC14 — GPIO or OSC32_IN |
| Pin produk 62 | PC15 — GPIO or OSC32_OUT |
| Pin produk 63 | VDDA — Analog power supply |
| Pin produk 64 | VSSA — Analog ground |
Aplikasi Umum
STM32L471RET6 cocok untuk 6 aplikasis: Industrial Sensors and Actuators, Smart Meters, Medical Devices, Wearable Fitness Trackers, IoT Nodes, Portable Instrumentation.
Industrial Sensors and Actuators
The STM32L471RET6 is ideal for industrial sensors and actuators due to its ultra-low-power modes and rich analog peripherals. Its 12-bit ADC with hardware oversampling enables precise sensor readings, while the multiple communication interfaces (USART, SPI, I2C, CAN) allow seamless integration with industrial networks. The wide supply voltage range (1.71V to 3.6V) accommodates various power sources, and the low-power modes extend battery life in remote monitoring systems. In a typical industrial sensor node, the MCU reads analog sensor data, processes it with the FPU, and transmits results over CAN or RS-485, all while consuming minimal power in sleep mode between measurements.
Direkomendasikan
Smart Meters
The STM32L471RET6 is well-suited for smart meters, handling metrology calculations, communication protocols, and display control. Its 12-bit ADC with up to 16 channels can sample voltage and current waveforms for energy measurement, while the FPU accelerates the required mathematical computations. The ultra-low-power modes allow the meter to operate on battery power for extended periods, with current consumption as low as 100 nA in Shutdown mode. The device's communication interfaces (USART, SPI, I2C) enable connectivity with PLC modems, RF modules, or wired networks for data reporting. In a typical smart meter, the MCU periodically wakes up, performs measurements, updates the display, and communicates data, then returns to low-power sleep to conserve energy.
Direkomendasikan
Medical Devices
The STM32L471RET6 is suitable for medical devices such as glucose monitors and infusion pumps, where low power consumption and precise analog measurements are critical. Its 12-bit ADC with hardware oversampling provides accurate sensor readings, while the FPU supports complex signal processing algorithms. The device's low-power modes enable long battery life, essential for portable medical devices. The multiple communication interfaces allow data transfer to external displays or wireless modules. In a glucose monitor, the MCU reads the sensor signal, processes it to calculate glucose levels, and displays the result, all while consuming minimal power to extend battery life between charges.
Direkomendasikan
Wearable Fitness Trackers
The STM32L471RET6 is ideal for wearable fitness trackers due to its ultra-low-power operation and small LQFP-64 package. The device can run on a coin cell battery for months, thanks to its low-power modes and efficient 90 nm process technology. Its 12-bit ADC can interface with accelerometers and heart-rate sensors, while the FPU processes the data for activity tracking. The communication interfaces (I2C, SPI) connect to sensors and displays. In a typical fitness tracker, the MCU continuously samples motion data, processes it to detect steps or activity, and communicates with a smartphone via Bluetooth, all while minimizing power consumption to extend battery life.
Direkomendasikan
IoT Nodes
The STM32L471RET6 is a strong choice for IoT nodes, offering a balance of performance and energy efficiency. Its ultra-low-power modes allow battery-powered operation for years, while the FPU and DSP instructions handle sensor data processing. The device supports multiple communication interfaces (USART, SPI, I2C, USB) for connecting to various wireless modules (LoRa, BLE, Wi-Fi). In a typical IoT node, the MCU wakes up periodically, reads sensors, processes data, and transmits it over a wireless link, then returns to sleep. The wide supply voltage range (1.71V to 3.6V) accommodates different battery configurations, and the rich analog peripherals enable direct sensor interfacing.
Direkomendasikan
Portable Instrumentation
The STM32L471RET6 is well-suited for portable instrumentation, such as handheld multimeters and data loggers, due to its low power consumption and high-resolution ADC. The 12-bit ADC with hardware oversampling provides accurate measurements, while the FPU supports complex calculations. The device's low-power modes extend battery life, and the multiple communication interfaces allow data transfer to a PC or smartphone. In a portable data logger, the MCU samples analog signals, stores data in flash memory, and communicates via USB, all while operating from a battery. The wide supply voltage range ensures compatibility with various battery chemistries.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk STM32L471RET6 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | STM32L471RGT6 | STM32L476RGT6 | STM32L475RGT6 | GD32F450RET6 |
|---|---|---|---|---|---|
| Package | LQFP-64 | LQFP-64 | LQFP-64 | LQFP-64 | LQFP-64 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice |
| Core | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F |
| Max Clock Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 200 MHz |
| Flash Memory | 512 KB | 1 MB | 1 MB | 1 MB | 512 KB |
| SRAM | 128 KB | 128 KB | 128 KB | 128 KB | 192 KB |
| Supply Voltage Range | 1.71V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V | 2.6V to 3.6V |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
Diferensiator Kunci
- Ultra-low-power modes with 100 nA shutdown current (vsGD32F450RET6)
- Wide supply voltage range (1.71V to 3.6V) (vsGD32F450RET6)
- Rich analog peripherals (12-bit ADC, 12-bit DAC, comparators, op-amps) (vsSTM32L475RGT6)
Catatan Desain
Ensure proper power supply decoupling: place a 100 nF ceramic capacitor close to each VDD pin and a 4.7 uF capacitor at the main power input. For the VDDA pin, use a dedicated 1 uF capacitor to ensure stable analog performance. This reduces noise and improves ADC accuracy.
For the LQFP-64 package, ensure adequate ground plane and thermal vias under the exposed pad (if present) to improve heat dissipation. Keep high-speed signal traces short and avoid routing them near the crystal oscillator pins to minimize EMI.
Configure the clock system carefully: the device can run from an internal 16 MHz HSI oscillator, but for precise timing, use an external 8 MHz crystal with appropriate load capacitors. Also, set the boot pins (BOOT0 and BOOT1) correctly for the desired boot mode (flash, system memory, or SRAM) to avoid unexpected startup behavior.
Informasi Konformitas
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified; for automotive, consider STM32L4 series with AEC-Q100 qualification.
