STM32L451RET6 - Ultra-Low-Power Cortex-M4 MCU 512KB Flash | STMicroelectronics
MPN: STM32L451RET6 ✓ AktifSTM32L451RET6 Ringkasan
A microcontroller (MCU) is a compact integrated circuit designed to govern a specific operation in an embedded system. It contains a processor core, memory, and programmable input/output peripherals. The STM32L451RET6 belongs to the STM32L4 series, which is part of the broader STM32 family of 32-bit microcontrollers. This series is optimized for ultra-low-power consumption, making it ideal for IoT devices, wearables, and industrial sensors. The Cortex-M4 core with FPU enhances performance for digital signal processing (DSP) tasks, while the rich set of analog and digital peripherals enables versatile system integration.
Key features of the STM32L451RET6 include a 12-bit ADC with 5 MSPS, two 12-bit DACs, an operational amplifier, a comparator, and a digital filter for sigma-delta modulators (DFSDM). It also supports multiple communication interfaces: I2C, SPI, USART, UART, LPUART, SAI, and CAN. The device integrates a real-time clock (RTC), several timers, and a true random number generator (TRNG). Its ultra-low-power modes, including Sleep, Low-power run, Low-power sleep, Stop 0/1/2, and Standby, allow designers to minimize energy consumption in battery-operated systems.
From a technical perspective, the STM32L451RET6 is built on a 40 nm process technology, which contributes to its low power consumption. It operates from a 1.71 V to 3.6 V power supply, and its GPIOs are 5V-tolerant, simplifying interfacing with legacy logic. The device includes a memory protection unit (MPU) and a hardware cryptographic accelerator (AES) for secure applications. The flexible power management with multiple voltage scaling options (Range 1, 2, and 3) allows the core to run at lower voltages to save power when performance is not critical.
Typical applications for the STM32L451RET6 include smart meters, medical devices, industrial sensors, portable instrumentation, and IoT edge nodes. Its combination of low power, high performance, and rich analog peripherals makes it a preferred choice for applications requiring long battery life and precise analog measurements. For example, in a smart meter, the MCU can handle metering calculations, communication protocols, and display control while consuming minimal power in standby mode.
When designing with this MCU, it is essential to pay attention to the power supply decoupling: place a 100 nF capacitor close to each VDD pin and a 4.7 uF capacitor at the main power input. Additionally, the VDDA pin must be connected to a clean analog supply, and the VREF+ pin should be decoupled with a 1 uF capacitor for accurate ADC conversions. Proper layout of the crystal oscillator (if used) is critical for reliable clock operation.
Alternatif penggantian untuk STM32L451RET6 — 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 STM32L451RET6 (sama faktor bentuk dan footprint) — berbeda di dalam Operating Temperature Range, Package, SRAM, Supply Voltage Range, ADC.
STM32L452RET6
✅ Drop-InKontak untuk harga
Lihat Datasheet →STM32L451RCT6
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
STM32L462RET6
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
STM32L476RET6
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →GD32F450VET6
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
STM32L451RET6 Rating Maksimal & Karakteristik Listrik
| Core | Arm Cortex-M4 with FPU |
| Frekuensi Bawah Maximum | 80 MHz |
| Flash Memory | 512 KB |
| SRAM | 160 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| Paket | 64-LQFP (10x10 mm) |
| Tipe Mounting | Surface Mount |
| Rentang Suhu Kerja | -40°C to +85°C |
| ADC Resolution | 12-bit |
| ADC Sample Rate | 5 MSPS |
| DAC Resolution | 12-bit |
| Number of I2C Interfaces | 4 |
| Number of SPI Interfaces | 3 |
| Number of USART/UART Interfaces | 3 USART + 1 UART + 1 LPUART |
| Number of Timers | 8 (including 2 advanced, 5 general-purpose, 2 basic) |
| Status RoHS | Compliant |
Konfigurasi Pin STM32L451RET6
| Pin produk 1 | VBAT — Backup battery supply for RTC and backup registers |
| Pin produk 2 | PC14/OSC32_IN — PC14 or 32.768 kHz oscillator input |
| Pin produk 3 | PC15/OSC32_OUT — PC15 or 32.768 kHz oscillator output |
| Pin produk 4 | PH0/OSC_IN — PH0 or main oscillator input |
| Pin produk 5 | PH1/OSC_OUT — PH1 or main oscillator output |
| 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 — Digital ground |
| Pin produk 13 | PC4 — GPIO or ADC input |
| Pin produk 14 | PC5 — GPIO or ADC input |
| Pin produk 15 | PB0 — GPIO or ADC input |
| Pin produk 16 | PB1 — GPIO or ADC input |
| Pin produk 17 | PB2 — GPIO |
| Pin produk 18 | PB10 — GPIO or I2C/SPI/UART |
| Pin produk 19 | PB11 — GPIO or I2C/SPI/UART |
| Pin produk 20 | VSS — Digital ground |
| Pin produk 21 | VDD — Digital power supply |
| Pin produk 22 | PB12 — GPIO or SPI |
| Pin produk 23 | PB13 — GPIO or SPI |
| Pin produk 24 | PB14 — GPIO or SPI |
| Pin produk 25 | PB15 — GPIO or SPI |
| Pin produk 26 | PC6 — GPIO or timer |
| Pin produk 27 | PC7 — GPIO or timer |
| Pin produk 28 | PC8 — GPIO or timer |
| Pin produk 29 | PC9 — GPIO or timer |
| Pin produk 30 | PA0 — GPIO or ADC/WKUP |
| Pin produk 31 | PA1 — GPIO or ADC |
| Pin produk 32 | PA2 — GPIO or USART |
| Pin produk 33 | PA3 — GPIO or USART |
| Pin produk 34 | VSS — Digital ground |
| Pin produk 35 | VREF+ — ADC reference voltage |
| Pin produk 36 | VDDA — Analog power supply |
| Pin produk 37 | PA4 — GPIO or DAC |
| Pin produk 38 | PA5 — GPIO or DAC |
| Pin produk 39 | PA6 — GPIO or ADC |
| Pin produk 40 | PA7 — GPIO or ADC |
| Pin produk 41 | PC10 — GPIO or USART |
| Pin produk 42 | PC11 — GPIO or USART |
| Pin produk 43 | PC12 — GPIO or USART |
| Pin produk 44 | PD2 — GPIO |
| Pin produk 45 | PB3 — GPIO or SPI |
| Pin produk 46 | PB4 — GPIO or SPI |
| Pin produk 47 | PB5 — GPIO or I2C |
| Pin produk 48 | PB6 — GPIO or I2C |
| Pin produk 49 | PB7 — GPIO or I2C |
| Pin produk 50 | BOOT0 — Boot mode selection |
| Pin produk 51 | PB8 — GPIO or I2C |
| Pin produk 52 | PB9 — GPIO or I2C |
| Pin produk 53 | VSS — Digital ground |
| Pin produk 54 | VDD — Digital power supply |
| Pin produk 55 | PA8 — GPIO or timer |
| Pin produk 56 | PA9 — GPIO or USART |
| Pin produk 57 | PA10 — GPIO or USART |
| Pin produk 58 | PA11 — GPIO or USB |
| Pin produk 59 | PA12 — GPIO or USB |
| Pin produk 60 | PA13 — SWDIO (Serial Wire Debug) |
| Pin produk 61 | PA14 — SWCLK (Serial Wire Clock) |
| Pin produk 62 | PA15 — GPIO or JTAG |
| Pin produk 63 | PC13 — GPIO or RTC |
| Pin produk 64 | PC14 — GPIO or RTC |
Aplikasi Umum
STM32L451RET6 cocok untuk 6 aplikasis: Smart Meters, Wearable Health Monitors, Industrial Sensors, IoT Edge Nodes, Portable Instrumentation, Audio Processing.
Smart Meters
The STM32L451RET6 is ideal for smart meters due to its ultra-low-power modes, high-resolution ADC for accurate energy measurement, and multiple communication interfaces (UART, SPI, I2C) for data transmission. In a typical smart meter, the MCU reads current and voltage sensors via the ADC, calculates energy consumption, and communicates via a wireless module or PLC modem. Its low-power Stop mode allows the meter to operate for years on a battery, while the 80 MHz Cortex-M4 core handles complex metering algorithms. The 512 KB Flash provides ample space for firmware and calibration data, and the 160 KB SRAM supports real-time data processing. The device's robustness and wide operating temperature range make it suitable for outdoor installations.
Direkomendasikan
Wearable Health Monitors
The STM32L451RET6 is well-suited for wearable health monitors such as fitness trackers and heart rate monitors. Its ultra-low-power consumption (as low as 100 nA in Stop 2) extends battery life, while the integrated ADC and operational amplifier enable precise biosignal acquisition. The MCU can process ECG or PPG signals using the Cortex-M4 DSP instructions, and communicate results via BLE using an external module. The small 64-LQFP package fits compact PCB designs, and the wide supply voltage range allows direct battery operation. Designers can leverage the multiple timers for pulse generation and the DMA for efficient data transfer, reducing CPU load and power consumption.
Direkomendasikan
Industrial Sensors
In industrial settings, the STM32L451RET6 serves as the brain of smart sensors for monitoring temperature, pressure, or vibration. Its 12-bit ADC with 5 MSPS sampling rate captures high-speed sensor signals, while the multiple UART/SPI interfaces connect to industrial networks like Modbus or CAN. The MCU's robust design, with an operating temperature range of -40°C to +85°C, ensures reliable operation in harsh environments. The low-power modes allow battery-powered wireless sensors to run for extended periods. The 512 KB Flash enables storing calibration tables and logging data, and the hardware AES accelerator (on some variants) secures communication. The device's rich timer set supports PWM generation for actuator control, making it a versatile choice for industrial automation.
Direkomendasikan
IoT Edge Nodes
The STM32L451RET6 is an excellent choice for IoT edge nodes that require local processing and low power consumption. It can run lightweight machine learning models for anomaly detection using the Cortex-M4 DSP instructions, and communicate with the cloud via Wi-Fi or LoRa modules. The device's multiple low-power modes allow it to sleep between sensor readings, conserving battery. The integrated AES encryption (on some variants) secures data transmission. With 512 KB Flash and 160 KB SRAM, it can handle complex protocols like MQTT and TLS. The 64-pin LQFP package is easy to solder in production, and the wide supply voltage range accommodates various battery chemistries.
Direkomendasikan
Portable Instrumentation
The STM32L451RET6 is ideal for portable test and measurement equipment such as handheld multimeters, data loggers, and oscilloscopes. Its high-resolution ADC and DAC enable accurate signal generation and measurement, while the low-power modes extend battery life for field use. The MCU can drive a graphical LCD via SPI or parallel interface, and the multiple timers generate precise timing signals. The 512 KB Flash allows storing large data logs, and the USB interface (on some variants) enables easy data transfer to a PC. The device's small package and low power consumption make it perfect for battery-powered instruments that need to be compact and energy-efficient.
Direkomendasikan
Audio Processing
The STM32L451RET6 can be used in audio applications such as voice recorders, audio effects processors, and active noise cancellation. Its Cortex-M4 core with FPU and DSP instructions accelerates audio algorithms like filtering and FFT. The two 12-bit DACs can output analog audio, and the SAI interface connects to external audio codecs. The device's low power consumption is beneficial for battery-powered audio devices. The 512 KB Flash can store audio samples, and the 160 KB SRAM supports real-time processing. The DFSDM (digital filter for sigma-delta modulators) allows direct connection to MEMS microphones, simplifying the audio input path.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk STM32L451RET6 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | STM32L452RET6 | STM32L451RCT6 | STM32L462RET6 | STM32L476RET6 | GD32F450VET6 |
|---|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice |
| Core | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU |
| Maximum Clock Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 200 MHz |
| Flash Memory | 512 KB | 512 KB | 256 KB | 512 KB | 512 KB | 512 KB |
| SRAM | 160 KB | 160 KB | 160 KB | 160 KB | 128 KB | 192 KB |
| Supply Voltage Range | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 2.6 V to 3.6 V |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Security Features | None (basic) | TRNG, AES | None (basic) | TRNG, AES, USB | TRNG, AES | TRNG, AES |
Diferensiator Kunci
- Ultra-low-power consumption with Stop 2 mode at 100 nA (vsSTM32L476RET6)
- Higher SRAM capacity (160 KB) than STM32L476RET6 (vsSTM32L476RET6)
- Pin-to-pin compatible with STM32L452RET6 but lower cost (vsSTM32L452RET6)
Catatan Desain
Decouple each VDD pin with a 100 nF ceramic capacitor placed as close as possible to the pin. Additionally, place a 4.7 uF capacitor at the main power input. The VDDA pin must be connected to a clean analog supply, and VREF+ should be decoupled with a 1 uF capacitor for accurate ADC conversions. For battery-powered designs, use the low-power modes (Stop 2) to minimize current consumption.
For the 64-LQFP package, ensure proper solder paste stencil design to avoid bridging. The exposed pad (if present) should be connected to ground for thermal relief. Place the crystal oscillator (if used) close to the MCU with short traces and a ground guard ring to reduce noise. Keep high-speed communication lines (SPI, USART) away from analog traces to prevent crosstalk.
Do not exceed the absolute maximum ratings: VDD must not exceed 3.6 V, and GPIOs are 5V-tolerant but not for continuous high current. Ensure the BOOT0 pin is properly configured to avoid accidental boot from system memory. When using the ADC, avoid floating analog inputs; connect unused ADC channels to ground. Also, verify the clock configuration to avoid overclocking the core beyond 80 MHz.
Informasi Konformitas
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified; for automotive, consider STM32L4 series with AEC-Q100 qualification.
