STMicroelectronics STM32F446VCT6

Overview

STM32F446VCT6 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 (7.2 MSPS in triple interleaved mode), and two CAN 2.0B interfaces - deployed in industrial motor control systems requiring real-time sensor fusion and multi-protocol connectivity.

For engineers reviewing the STM32F446VCT6 datasheet, STM32F446VCT6 pinout, STM32F446VCT6 application, or STM32F446VCT6 equivalent, key selection criteria include its 100-pin LQFP package, 114 GPIOs (111 at 90 MHz), dual audio-capable SAI interfaces, hardware RTC with subsecond accuracy, and support for external SDRAM/NOR via Flexible Memory Controller - critical for HMI, audio gateway, and edge node designs.

Technical Context

The STM32F446VCT6 integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 180 MHz, alongside a dual-bank flash architecture supporting read-while-write operations. Its memory subsystem includes 128 KB SRAM plus 4 KB battery-backed SRAM and 20×32-bit backup registers.

Peripherals are orchestrated via a multi-AHB bus matrix with dedicated DMA streams (16-channel controller with FIFOs); clocking uses multiple PLLs - main PLL, audio PLL (PLLI2S), and SAI PLL (PLLSAI) - enabling independent, jitter-optimized audio and communication timing domains.

Key Specifications

Pinout & Package

LQFP100 package (14 × 14 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, rated for industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F446VCT6, the STM32F407VGT6 trades audio/USB-HS capability for higher flash/RAM at lower cost, while the STM32H743VIT6 delivers 2.7× CoreMark/MHz and hardware security at the expense of SPDIF and CEC - making the F446 optimal for balanced audio+control edge nodes.

Availability

STM32F446VCT6 is available at Aetrix Electronics and suitable for industrial motor drives, smart building HMIs, medical sensor hubs, and audio gateway nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32F446VCT6 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STM32F4 series targets high-performance real-time embedded applications demanding DSP capability, rich connectivity, and deterministic timing - especially where audio, motor control, and multi-protocol interfacing converge.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32F446VCT6 achieves 180 MHz using its Arm Cortex-M4 core with FPU and the Adaptive Real-time Accelerator (ART Accelerator™), which eliminates flash wait states. This requires enabling the ART prefetcher and cache; measured performance is 225 DMIPS per Dhrystone 2.1 benchmark under these conditions.

Does STM32F446VCT6 support external SDRAM, and what interface is used?

Yes, it supports external SDRAM up to 256 Mbit via the Flexible Memory Controller (FMC) with 16-bit data bus and dedicated address/control signals. The FMC also supports NOR, PSRAM, and NAND flash, enabling large frame buffers for LCD or protocol stack memory expansion.

How many ADC channels can be used simultaneously, and what is the effective sampling rate?

Up to 24 ADC channels across three 12-bit converters can be used concurrently. In triple interleaved mode, they achieve 7.2 MSPS aggregate sampling - e.g., capturing three-phase motor currents and DC-link voltage within one 10 µs window for precise FOC timing.

What debug interfaces are supported, and is SWD sufficient for full development?

It supports both SWD (2-pin) and JTAG (5-pin) debug interfaces. SWD is fully sufficient for programming, real-time tracing (via SWO), and full-featured debugging including breakpoints, watchpoints, and memory inspection - all standard IDEs (STM32CubeIDE, Keil, IAR) support it natively.