STMicroelectronics STM32F446MCY6TR

Overview

STM32F446MCY6TR 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 triple interleaved), two DACs, and 20 communication interfaces including dual CAN 2.0B, SAI, SPDIF-RX, and SDIO - deployed in industrial motor control and audio gateway systems.

For engineers reviewing the STM32F446MCY6TR datasheet, STM32F446MCY6TR pinout, STM32F446MCY6TR application, or STM32F446MCY6TR equivalent, key selection considerations include USB HS/FS dual PHY support, 180 MHz real-time performance with ART Accelerator, 114 GPIOs (112 5 V-tolerant), and flexible memory interface (FMC + QuadSPI) for external SDRAM/NOR/NAND expansion.

Technical Context

The device integrates an Adaptive Real-Time Accelerator (ART) enabling zero-wait-state execution from flash at 180 MHz, alongside a multi-AHB bus matrix and 16-stream DMA supporting burst transfers. Its clock system includes dual PLLs (main PLL + PLLI2S + PLLSAI), dedicated audio PLLs, and independent 32 kHz RTC oscillator with calibration.

Peripheral architecture features dual advanced-control timers (TIM1/TIM8) with complementary PWM outputs, two SAI blocks for I²S/TDM audio, SPDIF-RX for digital audio input, and a parallel DCMI interface capable of 54 MB/s camera data capture - all coordinated via nested vectored interrupt controller (NVIC) with 240 interrupt lines.

Key Specifications

Pinout & Package

STM32F446MCY6TR uses a 64-ball UFBGA package (5 × 5 mm, 0.5 mm pitch), optimized for high-density PCB layouts while maintaining signal integrity for high-speed peripherals including USB HS, SAI, and DCMI. Pin mapping aligns with LQFP64 mechanical footprint for design reuse.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VGT6, STM32F446MCY6TR delivers higher USB bandwidth, audio-class timing precision, and faster ADC throughput; versus STM32H743ZIT6, it offers lower power, smaller footprint, and SPDIF-RX support - making it optimal for compact, audio-centric industrial gateways.

Availability

STM32F446MCY6TR is available at Aetrix Electronics and suitable for industrial motor control, audio gateway nodes, smart HMI displays, and secure industrial gateways requiring stable component supply across extended product lifecycles.

Supply support for STM32F446MCY6TR 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 vertical manufacturing capability.

The STM32F4 Series targets high-performance real-time embedded applications demanding DSP capability, rich connectivity, and deterministic timing - especially in industrial automation, audio processing, and human-machine interface systems.

FAQ

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

The STM32F446MCY6TR achieves 180 MHz maximum CPU frequency using its Arm Cortex-M4 core with FPU and Adaptive Real-Time Accelerator (ART). ART eliminates flash wait states by pre-fetching and caching instructions, enabling deterministic zero-wait-state execution even with complex DSP algorithms running directly from flash memory.

Does this MCU support external SDRAM, and what interface is used?

Yes, STM32F446MCY6TR supports external SDRAM via its Flexible Memory Controller (FMC) with a 16-bit data bus. The FMC implements standard SDRAM command protocols and supports LPDDR/SDR SDRAM up to 128 MB, enabling frame buffer storage for TFT displays or real-time data buffering in industrial gateways.

How many USB interfaces does it have, and what are their capabilities?

It integrates two independent USB controllers: USB OTG FS with on-chip PHY and USB OTG HS with dedicated DMA, on-chip FS PHY, and ULPI interface for external HS PHY. Both support host/device/OTG roles, enabling simultaneous USB device (e.g., HID) and host (e.g., flash drive) operation in embedded applications.

Is the UFBGA64 package pin-compatible with any LQFP variant?

Yes, the UFBGA64 (5 × 5 mm) package uses the same 64-pin functional mapping as the LQFP64 (10 × 10 mm) variant, allowing direct PCB layout reuse when migrating from through-hole to space-constrained designs - verified per ST's AN4876 and package drawing DS10693 Rev 11 Section 7.2.