Item specifics
Description
STM32L451VET6 Product Overview
STM32L451VET6 is an Arm Cortex-M4 MCU at 80 MHz with FPU and ART Accelerator, LQFP-100. 512 KB Flash, 160 KB SRAM, 12-bit ADC (16 ch), 12-bit DAC, two comparators, LP timers, RTC, 2×USART, 1×UART, 1×LPUART, 3×SPI/I2S, 4×I2C, SAI audio interface. Up to 83 x 5 V-tolerant I/Os. 1.71–3.6 V, -40–85 °C. Compared to the L431/L433 series, the STM32L451VET6 omits USB and CAN while significantly increasing Flash and SRAM, making it an excellent ultra-low-power platform for battery-powered sensors, portable meters, and industrial control applications needing large memory and rich peripherals without USB connectivity.
STM32L451VET6 Core Features
Core: The STM32L451VET6 features an Arm Cortex-M4 core at 80 MHz, with FPU + ART Accelerator
Memory: The STM32L451VET6 provides 512 KB Flash and 160 KB SRAM
Analog: 12-bit ADC (16 ch), 12-bit DAC, 2×Comparators
Connectivity: 2×USART, 1×UART, 1×LPUART, 3×SPI/I2S, 4×I2C, SAI
Timers: 1×Advanced Timer, multiple GP/LP timers, RTC
I/Os: 83 (5 V-tolerant)
Package: LQFP-100
Temperature Range: -40°C to 85°C
STM32L451VET6 Applications
Battery-Powered Sensors: The STM32L451VET6 is ideal for wireless sensors needing large program storage and data buffering, as well as environmental monitoring nodes
Portable Devices: Wearables and portable medical devices can leverage the STM32L451VET6's ultra-low power consumption
Industrial Metering & Instrumentation: Water, gas, and electricity meters are perfect applications for the STM32L451VET6
Consumer Electronics: Advanced remote controls, e-labels, and smart cards benefit from the STM32L451VET6's rich peripherals
Industrial Control: Multi-sensor nodes and field controllers without USB requirements can rely on the STM32L451VET6
STM32L451VET6 Key Advantages
512 KB Flash + 160 KB SRAM: The STM32L451VET6 delivers class-leading massive storage for complex protocol stacks, real-time algorithms, and large data buffering
Cortex-M4 + FPU + Ultra-Low Power: The STM32L451VET6 achieves excellent DSP and floating-point performance while maintaining extremely low power consumption
On-Chip DAC & Comparators: The STM32L451VET6 offers analog output and signal threshold detection without external components
83 I/Os + SAI + Rich SPI/I2C: The STM32L451VET6 provides strong peripheral connectivity and an audio interface for multi-sensor and complex systems
LPUART Low-Power Serial Interface: Supports asynchronous communication in low-power modes, further optimizing system power consumption
5 V-tolerant I/Os: Enhanced system noise immunity, simplified external level-shifting circuitry
Full Ecosystem Compatibility: Easy development with STM32CubeIDE/HAL/LL libraries for the STM32L451VET6
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FAQ
1. What is STM32L451VET6?
STM32L451VET6 is an ultra-low-power 32-bit MCU from STMicroelectronics' STM32L4 series, built around an Arm® Cortex®-M4 core with FPU and DSP instructions in an LQFP-100 package. Operating at 80 MHz, the STM32L451VET6 provides 512 KB Flash and 128 KB SRAM while retaining essential communication interfaces such as CAN 2.0B, USB OTG, and SAI, offering an excellent balance of performance, power efficiency, and cost for industrial and IoT applications that do not require a segment LCD.
2. What are the key specifications of STM32L451VET6?
Core: Arm® Cortex®-M4, up to 80 MHz, 100 DMIPS with FPU and DSP
Memory: 512 KB Flash, 128 KB SRAM
Operating Voltage: 1.71 V to 3.6 V
Temperature Range: -40 °C to +85 °C (industrial grade)
I/O Count: up to 83
Package: LQFP-100 (14 mm × 14 mm)
3. What package does STM32L451VET6 use and is it easy to solder?
The STM32L451VET6 comes in an LQFP-100 package measuring 14 mm × 14 mm with exposed 0.5 mm pitch leads. Drag-soldering the STM32L451VET6 with a standard soldering iron is straightforward—no hot-air station required—making it very suitable for hand assembly, prototyping, and small-batch production.
4. What applications is STM32L451VET6 suitable for?
With 512 KB Flash, CAN 2.0B bus, USB OTG, and up to 83 I/Os, the STM32L451VET6 is ideal for battery-powered devices that need extensive I/O connectivity and industrial communication, such as industrial control panels, distributed sensor networks, fieldbus nodes, portable medical equipment, and IoT concentrators running complex protocol stacks.
5. What development tools support STM32L451VET6?
ST provides free STM32CubeMX for graphical configuration and STM32CubeIDE as an integrated development environment for the STM32L451VET6, along with the STM32CubeL4 firmware library. Debugging and programming are handled by ST-Link debuggers. Compatible Nucleo or Discovery boards with similar peripheral sets can be used for rapid prototyping and seamless code migration.
6. What is the power consumption of the STM32L451VET6 across its low-power modes?
Temperature Range: -40 °C to +85 °C
Ultra-low-power modes of the STM32L451VET6:
Shutdown mode: ~33 nA (5 wake-up pins)
Standby mode: ~125 nA (5 wake-up pins), ~430 nA with RTC
Stop 2 mode: ~1.2 µA, ~1.4 µA with RTC
Run mode: ~100 µA/MHz (LDO mode)
7. How does STM32L451VET6 differ from STM32L471VET6?
Both share an LQFP-100 package, 80 MHz Cortex-M4 core, 512 KB Flash, and 128 KB SRAM, as well as CAN 2.0B, USB OTG, and SAI. The main difference is that the L471 additionally supports SWPMI (Single Wire Protocol Master Interface) for connecting SIM cards or secure elements, whereas the STM32L451VET6 omits SWPMI to optimize cost. If single-wire protocol communication is not required, the STM32L451VET6 delivers the same processing performance and peripheral set at a more competitive price point.
8. What key peripheral interfaces does STM32L451VET6 offer?
Communication: CAN 2.0B, I²C, SPI, UART/USART, USB OTG FS, SAI (I2S/PCM/PDM)
Analog: 12-bit 5 Msps ADC, 12-bit DAC, ultra-low-power comparators
Timers: 16-bit and 32-bit general-purpose timers, advanced motor-control timer
Others: Quad SPI interface, SDMMC interface
9. What is the main difference between STM32L451VET6 and STM32L452VET6?
Both share the same package and Flash size. The L452VET6 offers 160 KB SRAM (32 KB more than the STM32L451VET6) and integrates operational amplifiers for sensor signal conditioning. The STM32L451VET6 provides 128 KB SRAM and no op-amps at a lower cost. If your application does not need analog front-end amplification and 128 KB of RAM is sufficient, the STM32L451VET6 is the more economical choice.
10. How does STM32L451VET6 differ from STM32L476VET6?
Both are LQFP-100 devices with an 80 MHz Cortex-M4 core and 512 KB Flash. The key difference is that the STM32L451VET6 does not include a segment LCD driver, whereas the L476 integrates one along with CAN 2.0B. If your design does not involve a segment display, the STM32L451VET6 provides excellent processing performance and ultra-low power consumption with a more streamlined peripheral set.