STMicroelectronics STM32F446VET7

Overview

STM32F446VET7 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 180 MHz (225 DMIPS), featuring 512 KB flash, 128+4 KB RAM, dual USB OTG (FS/HS), three 12-bit ADCs (up to 7.2 MSPS in triple interleaved mode), and two CAN 2.0B interfaces - deployed in industrial motor control and audio processing systems requiring real-time signal handling and multi-interface connectivity.

For engineers reviewing the STM32F446VET7 datasheet, STM32F446VET7 pinout, STM32F446VET7 application, or STM32F446VET7 equivalent, key selection criteria include its ART Accelerator™ enabling zero-wait-state execution from flash, dual-mode QuadSPI for external memory expansion, 114 GPIOs (112 5 V-tolerant), and integrated audio peripherals (SAI, SPDIF-RX, I2S) supporting high-fidelity digital audio subsystems.

Technical Context

The STM32F446VET7 implements an Arm Cortex-M4 core with hardware FPU and Memory Protection Unit (MPU), coupled with ST's Adaptive Real-Time Accelerator (ART Accelerator™) that eliminates flash wait states via instruction prefetch and branch cache - critical for deterministic real-time loop execution in motor control firmware. Its clock system integrates multiple PLLs (main PLL, PLLI2S, PLLSAI) to independently drive CPU, audio, and SAI domains at optimal frequencies.

Peripheral architecture features a multi-AHB bus matrix enabling concurrent access to flash, SRAM, and peripherals; dual USB controllers (OTG_FS with on-chip PHY, OTG_HS with dedicated DMA and ULPI support); and a flexible external memory controller (FMC) supporting SDRAM, NOR/NAND, and PSRAM - enabling scalable HMI and data-logging implementations without external logic.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm) package with 100-pin leaded quad flat pack; thermally enhanced for industrial ambient operation up to 105°C junction temperature. Pin count and I/O mapping align with STM32F446xE series footprint compatibility.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F446VET7, the STM32F407VGT6 offers higher flash density but sacrifices ART-accelerated flash performance and audio interface depth, while the STM32H743VIT6 delivers superior CPU throughput and security yet omits SPDIF-RX - making the STM32F446VET7 uniquely balanced for real-time audio+control convergence.

Availability

STM32F446VET7 is available at Aetrix Electronics and suitable for industrial motor control, professional audio interfaces, medical patient monitors, and smart home gateways requiring stable component supply across extended product lifecycles.

Supply support for STM32F446VET7 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, specializing in microcontrollers, power management, sensors, and automotive ICs - with over 40 years of embedded systems innovation.

The STM32F446xE line targets high-performance, audio-rich embedded applications requiring real-time control, multi-protocol connectivity, and deterministic analog acquisition - extending the STM32F4 series with enhanced USB, audio, and memory interface capabilities.

FAQ

What is the maximum operating temperature for STM32F446VET7?

The STM32F446VET7 is rated for industrial temperature range: –40°C to +105°C ambient. Junction temperature must remain ≤125°C under all operating conditions; thermal design requires adherence to specified PCB copper area and VCAP decoupling per Section 7.3 of DS10693 Rev 11.

Does STM32F446VET7 support external SDRAM?

Yes - the Flexible Memory Controller (FMC) supports 16-bit SDRAM with up to 4 banks, compatible with standard LPDDR/SDR SDRAM chips. Initialization requires precise timing configuration per Section 3.9 and Table 6.3.26 of the datasheet, including refresh interval and burst length settings.

How many independent clock domains does the USB subsystem use?

The USB subsystem uses two independent clock domains: OTG_FS relies on the 48 MHz clock derived from the main PLL (via dedicated divider), while OTG_HS uses a separate 120 MHz clock from the main PLL - enabling simultaneous full-speed and high-speed operation without clock contention or software arbitration.

Can the backup SRAM retain data during Standby mode with VBAT applied?

Yes - when VBAT is supplied (2.0–3.6 V), the 4 KB backup SRAM retains data across Standby and VBAT modes. It remains powered even when VDD is removed, and contents persist through RTC calendar operation and 20×32-bit backup registers - verified in Section 3.18 and Table 6.29 of DS10693 Rev 11.