STMicroelectronics STM32F401RET7

Overview

STM32F401RET7 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 84 MHz, featuring 512 KB Flash, 96 KB SRAM, and integrated USB OTG FS controller with on-chip PHY. It delivers 105 DMIPS performance and supports real-time audio via I2S with PLLI2S, targeting embedded control and connectivity applications in industrial HMI and portable medical devices.

For engineers reviewing the STM32F401RET7 datasheet, STM32F401RET7 pinout, STM32F401RET7 application, or STM32F401RET7 equivalent, key selection criteria include its 84 MHz CPU frequency, 512 KB flash density, USB OTG FS + PHY integration, 12-bit 2.4 MSPS ADC, and 78 fast 42 MHz 5 V-tolerant GPIOs - all critical for resource-constrained, mixed-signal edge-node designs.

Technical Context

The STM32F401RET7 implements an Arm Cortex-M4 core with hardware FPU and ART Accelerator enabling zero-wait-state execution from Flash at 84 MHz. Its memory subsystem includes 512 KB of embedded Flash, 96 KB SRAM, and 512 bytes OTP, with MPU support for secure task isolation.

Peripherals are organized across multiple AHB/APB buses: dual 32-bit general-purpose timers (TIM2/TIM5), three I2C interfaces with SMBus/PMBus support, four SPIs (up to 42 Mbit/s), three USARTs (two at 10.5 Mbit/s), SDIO, and USB OTG FS with integrated PHY - enabling simultaneous high-speed serial comms and storage interfacing without external transceivers.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK2 construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F401RET7, the STM32F411RETx offers superior peripheral concurrency for data-rich gateways, while the STM32G431KBT6 trades USB/Flash capacity for higher analog integration and CPU speed - making each optimal for distinct system-level trade-offs.

Availability

STM32F401RET7 is available at Aetrix Electronics and suitable for industrial HMI, portable medical devices, smart energy meters, and IoT gateway nodes requiring stable component supply and long-term manufacturability.

Supply support for STM32F401RET7 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, specializing in microcontrollers, power management, sensors, and automotive ICs.

The STM32F4 series targets high-performance embedded applications demanding DSP capability, rich connectivity, and real-time responsiveness - particularly where USB, audio, and mixed-signal integration are central to system architecture.

FAQ

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

The STM32F401RET7 achieves 84 MHz maximum CPU frequency using its internal PLL driven by either the 4–26 MHz HSE crystal or the 16 MHz HSI RC oscillator. The ART Accelerator ensures zero-wait-state execution from Flash memory at this speed, eliminating instruction-fetch bottlenecks and delivering consistent 105 DMIPS performance without external SRAM.

Does STM32F401RET7 support USB device, host, and OTG simultaneously?

No - the USB 2.0 full-speed controller supports device, host, or OTG modes, but only one mode active at a time. Mode selection is controlled via software configuration of the USB_OTG_GUSBCFG register and external ID pin state. Hardware does not allow concurrent device and host stacks; OTG behavior requires external VBUS detection and ID pin routing.

How many ADC channels are available and what is their effective resolution?

The STM32F401RET7 integrates one 12-bit successive-approximation ADC with up to 16 external input channels. At 2.4 MSPS sampling rate, effective resolution is 11.2 bits (ENOB) under typical conditions due to aperture jitter and noise; actual usable resolution depends on signal bandwidth, sampling clock stability, and external analog front-end design.

Is the LQFP64 package of STM32F401RET7 pin-compatible with other STM32F4 series MCUs?

No - the STM32F401RET7 LQFP64 pinout is unique to the F401xD/E subfamily. While some power and reset pins align, peripheral alternate function mappings (e.g., USB, SDIO, SPI) differ significantly from STM32F411 or STM32F407 packages. Direct replacement requires PCB redesign and firmware adaptation due to non-overlapping AFIO register configurations.