STMicroelectronics STM32F411RET6

Overview

STM32F411RET6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, 100 MHz max CPU frequency, 512 KB Flash, 128 KB SRAM, and integrated USB OTG FS controller. It delivers 125 DMIPS performance and supports industrial motor control, sensor hub, and HVAC applications requiring real-time processing and low-power operation.

For engineers reviewing the STM32F411RET6 datasheet, STM32F411RET6 pinout, STM32F411RET6 application, or STM32F411RET6 equivalent, key selection factors include its 100 MHz ART-accelerated flash execution, 12-bit 2.4 MSPS ADC with up to 16 channels, 11 timers (including two 32-bit), 13 communication interfaces, and support for BAM (Batch Acquisition Mode) in ultra-low-power sensor acquisition.

Technical Context

The device integrates an adaptive real-time memory accelerator (ART Accelerator) enabling zero-wait-state execution from Flash at 100 MHz, and features a dynamic efficiency line with Batch Acquisition Mode (BAM) for low-power sensor data capture. Its clock system includes 4–26 MHz external crystal oscillator, factory-trimmed 16 MHz RC, and 32 kHz RTC oscillator with calibration.

Power management supports multiple low-power modes: Stop mode with 9 µA (deep power-down) and 42 µA (fast wakeup), Standby at 1.8 µA (25 °C, no RTC), and VBAT-supplied RTC with subsecond accuracy. All I/Os are 5 V-tolerant, and up to 78 pins operate at 100 MHz.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 51 general-purpose I/Os, all 5 V-tolerant, and 78 pins rated for 100 MHz operation. Includes dedicated VCAP_1/VCAP_2 decoupling pins for internal regulator stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F401RET6, the STM32F411RET6 offers superior USB integration and deterministic real-time performance via ART Accelerator; versus STM32F412RET6, it trades crypto acceleration and extra SRAM for lower BOM cost and identical core/peripheral feature set for non-security-critical applications.

Availability

STM32F411RET6 is available at Aetrix Electronics and suitable for industrial PLC modules, HVAC controllers, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32F411RET6 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 ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32F4 series targets high-performance embedded applications demanding real-time responsiveness, rich connectivity, and energy efficiency-especially where ARM Cortex-M4 DSP/FPU capabilities and integrated peripherals reduce system complexity.

FAQ

What is the maximum operating temperature range for STM32F411RET6?

The STM32F411RET6 is qualified for industrial operation from –40°C to +105°C ambient temperature. This rating applies to the LQFP64 package variant and is verified per JEDEC JESD47 stress testing. The device maintains full specification compliance-including ADC accuracy, timer resolution, and USB timing-across this full range when powered within 1.7–3.6 V.

Does STM32F411RET6 support external memory interfaces like SDRAM or NAND Flash?

No, the STM32F411RET6 does not integrate FSMC (Flexible Static Memory Controller) or OCTOSPI peripherals. It lacks native support for SDRAM, NOR/NAND Flash, or PSRAM expansion. Its memory subsystem is limited to on-chip 512 KB Flash and 128 KB SRAM. For external memory needs, designers must select higher-density variants such as STM32F429xx or STM32F767xx.

Can the USB OTG FS interface operate in host mode without external VBUS sensing?

Yes, the USB OTG FS controller supports host mode with software-controlled VBUS drive using the built-in transceiver's VBUS sensing capability. The device can detect VBUS presence via the USB_OTG_FS_VBUS pin and manage session requests autonomously. However, external VBUS discharge circuitry (e.g., 1.5 kΩ pull-down) is required for compliance with USB 2.0 specifications during device disconnection.

How many independent PWM outputs can be generated simultaneously on STM32F411RET6?

The STM32F411RET6 supports up to 32 independent PWM outputs: each of its six 16-bit general-purpose timers (TIM2–TIM7) provides up to four PWM channels, and the two 32-bit advanced-control timers (TIM1/TIM8) each deliver up to eight complementary PWM outputs with programmable dead-time insertion-totaling 32 fully configurable, phase-aligned PWM signals.