STMicroelectronics STM32L451VET6TR

Overview

STM32L451VET6TR from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, delivering 100 DMIPS at 80 MHz, featuring 512 KB Flash, 160 KB SRAM, and integrated analog peripherals including 12-bit ADC (5 Msps), dual 12-bit DACs, and RTC with hardware calendar-designed for battery-powered IoT sensor nodes, portable medical devices, and energy-harvesting wearables.

For engineers reviewing the STM32L451VET6TR datasheet, STM32L451VET6TR pinout, STM32L451VET6TR application, or STM32L451VET6TR equivalent, key selection criteria include verified ultra-low-power modes (375 nA Standby with RTC), 83 fast I/Os (most 5 V-tolerant), SAI audio interface support, CAN 2.0B capability, and LQFP100 package compatibility with industrial temperature range (–40 °C to +125 °C).

Technical Context

The device integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash at 80 MHz, alongside dual PLLs for independent system, audio, and ADC clock domains. Its interconnect matrix decouples bus arbitration between CPU, DMA, and peripherals to sustain real-time determinism under mixed workloads.

Power architecture includes FlexPowerControl with seven low-power modes-from Shutdown (22 nA) to Stop 2 (2.05 µA)-and hardware-based batch acquisition mode (BAM) for sensor data collection without CPU wake-up. The 12-bit ADC supports hardware oversampling up to 16-bit resolution, while the embedded op-amp with programmable gain amplifier enables direct sensor signal conditioning.

Key Specifications

Pinout & Package

LQFP100 package: 100-pin quad flat pack with exposed thermal pad, 0.5 mm pitch, 14 × 14 mm body size, RoHS-compliant and ECOPACK2® certified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with STM32L476VGT6, the STM32L451VET6TR offers lower system cost and dedicated audio (SAI) support but less Flash and no USB; versus STM32L552VET6, it provides simpler security model and lower active power, making it optimal for cost-sensitive, battery-constrained edge nodes without PSA compliance mandates.

Availability

STM32L451VET6TR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart building controllers, and industrial predictive maintenance edge nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32L451VET6TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-microwatt, with emphasis on extended battery life, rich analog integration, and seamless connectivity for IoT endpoints.

FAQ

What is the maximum operating temperature specification for STM32L451VET6TR?

The STM32L451VET6TR is qualified for industrial temperature range: –40 °C to +125 °C. This rating applies to all electrical characteristics in the datasheet (DS11910 Rev 5), including Flash programming, RTC operation, and analog peripheral accuracy. Thermal derating is not required within this range, and the LQFP100 package's thermal resistance (θ_JA = 40 °C/W) supports sustained operation at full 80 MHz under typical PCB layout conditions.

Does STM32L451VET6TR support hardware encryption acceleration?

No, the STM32L451VET6TR does not include dedicated hardware crypto accelerators (e.g., AES, SHA, PKA). It relies on software libraries (STM32CubeL4) for cryptographic operations. For hardware-accelerated cryptography, ST recommends the STM32L5 series (e.g., STM32L552VET6) with CryptoCell-310 and TrustZone®. The L451 does include a true RNG and CRC unit, which support basic security primitives but not full cipher offload.

Can the internal op-amp drive a 10 kΩ load with rail-to-rail output swing?

Yes-the integrated operational amplifier supports rail-to-rail output swing and can drive ≥10 kΩ loads while maintaining specified gain error (<1%) and GBW (1.5 MHz typ.) per DS11910 Section 6.3.22. Output voltage swing is guaranteed to within 50 mV of VDD and VSS under 10 kΩ load at 25 °C. Performance degrades slightly at temperature extremes or with capacitive loads >100 pF, requiring external compensation per application note AN4915.

Is the SAI interface capable of I²S master mode with 24-bit stereo output?

Yes-the Serial Audio Interface (SAI) supports I²S master mode with configurable data size (8–32 bits), stereo channel support, and programmable bit clock polarity and phase. It delivers 24-bit stereo output at sample rates up to 192 kHz when driven by the dedicated audio PLL. Verified operation is documented in RM0351 Reference Manual Section 35.4.3 and supported in STM32CubeMX v6.1.1+ with HAL_SAI_Transmit_DMA API.