STMicroelectronics STM32F401RDT6TR

Overview

STM32F401RDT6TR from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, delivering 105 DMIPS at 84 MHz, featuring 512 KB Flash, 96 KB SRAM, and integrated USB 2.0 FS OTG controller with on-chip PHY. It supports up to 81 I/Os (78 fast, 5 V-tolerant), 1×12-bit 2.4 MSPS ADC, and 11 communication interfaces including 3×USART, 3×I²C, 4×SPI, SDIO, and I²S - deployed in industrial HMI, portable medical sensors, and smart metering gateways.

For engineers reviewing the STM32F401RDT6TR datasheet, STM32F401RDT6TR pinout, STM32F401RDT6TR application, or STM32F401RDT6TR equivalent, key selection criteria include Flash/SRAM capacity, USB OTG FS integration, 5 V-tolerant GPIO count, low-power Stop mode current (10 µA), and LQFP64 package compatibility with legacy STM32F401RE designs.

Technical Context

The device implements an adaptive real-time accelerator (ART Accelerator) enabling zero-wait-state execution from Flash at 84 MHz, paired with a memory protection unit (MPU) for secure task isolation. Its clock system integrates dual oscillators - 4–26 MHz external crystal and factory-trimmed 16 MHz RC - plus 32 kHz RTC oscillator with calibration.

Power architecture includes three low-power modes: Stop (Flash in Deep power-down, 10 µA typical), Standby (2.4 µA at 25 °C), and VBAT-supplied RTC with subsecond accuracy. Peripheral interconnect uses multi-AHB bus matrix supporting concurrent DMA transfers across 16-stream controllers with FIFO buffering.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F401RDT6TR, STM32F401RET6 offers identical functionality with logistics-optimized packaging, while STM32F405RGT6 adds USB HS and dual ADC at the cost of layout incompatibility and higher BOM cost - making RDT6TR optimal for cost-sensitive, space-constrained USB device or sensor gateway designs.

Availability

STM32F401RDT6TR is available at Aetrix Electronics and suitable for industrial HMI, portable medical sensors, and smart metering gateways requiring stable component supply, long-term lifecycle assurance, and ECOPACK2 environmental compliance.

Supply support for STM32F401RDT6TR 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 management ICs, MEMS, and automotive SoCs since 1987.

The STM32F4 series targets high-performance embedded applications demanding DSP capability, rich connectivity, and deterministic real-time response - specifically engineered for industrial automation, medical devices, and IoT edge nodes.

FAQ

What is the maximum operating frequency and corresponding power consumption in Run mode?

The STM32F401RDT6TR operates at up to 84 MHz with ART Accelerator enabled. At 3.3 V supply, typical Run mode current is 146 µA/MHz (peripheral off), equating to ~12.3 mA total. This value assumes code execution from Flash with prefetch enabled and no active peripherals - actual consumption scales linearly with enabled clocks and I/O activity.

Does this MCU support hardware encryption or secure boot features?

No, the STM32F401RDT6TR does not integrate hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It relies on software-based encryption libraries and external secure elements for key management. For secure boot, developers must implement custom signature verification in user Flash using trusted public-key routines - verified against ST's AN4228 application note.

Can the USB OTG interface operate in Host mode without external components?

Yes, the integrated USB 2.0 Full-Speed OTG controller includes a built-in PHY, allowing Host, Device, or OTG operation without external transceivers. However, Host mode requires external 5 V VBUS supply generation and overcurrent protection circuitry - the MCU only handles protocol stack and data link layer, not power delivery.

What is the minimum supply voltage for RTC operation when VDD is powered down?

The RTC remains functional with VBAT ≥ 1.7 V, drawing only 1 µA at 25 °C. This allows continuous timekeeping and alarm wake-up during main power removal. The backup domain retains RTC registers, calendar, and 512 bytes of backup SRAM - provided VBAT is connected before VDD drops below 1.7 V to avoid register corruption.