STMicroelectronics STM32F401RBT6TR

Overview

STM32F401RBT6TR from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 84 MHz, featuring 256 KB Flash, 64 KB SRAM, one 12-bit 2.4 MSPS ADC (16 channels), USB 2.0 FS OTG controller with on-chip PHY, and 11 communication interfaces including 3×I²C, 3×USART, and 4×SPI. It targets embedded control in industrial sensors, portable medical devices, and smart home hubs requiring real-time signal processing and low-power connectivity.

For engineers reviewing the STM32F401RBT6TR datasheet, STM32F401RBT6TR pinout, STM32F401RBT6TR application, or STM32F401RBT6TR equivalent, key selection criteria include Flash/SRAM size, USB OTG support, 84 MHz CPU frequency with ART Accelerator™, and 5 V-tolerant GPIOs for mixed-voltage system interfacing.

Technical Context

The device integrates 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 includes dual oscillators - 4–26 MHz external crystal and factory-trimmed 16 MHz internal RC - plus dedicated 32 kHz RTC oscillator with calibration.

Power architecture supports multiple low-power modes: Stop mode with 10 µA (deep power-down), Standby at 2.4 µA (no RTC), and Run mode at 128 µA/MHz. Peripheral integration includes 16-stream DMA, SysTick timer, independent/window watchdogs, and hardware CRC calculation unit for firmware integrity.

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 STM32F401RBT6TR, the STM32F411REY6TR trades integrated USB PHY for doubled Flash capacity, while the STM32G431KBT6 sacrifices USB and memory for enhanced analog peripherals and 2× CPU clock speed - making each suitable for distinct subsystem roles in scalable product families.

Availability

STM32F401RBT6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, and smart home hub controllers requiring stable component supply, long-term lifecycle assurance, and ECOPACK2 environmental compliance.

Supply support for STM32F401RBT6TR 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, MEMS, and automotive ICs with vertical manufacturing and broad IP portfolio.

This part belongs to the STM32F4x1 mainstream Arm Cortex-M4 line, designed for cost-sensitive, power-aware embedded applications demanding USB connectivity, rich analog integration, and real-time performance - targeting industrial IoT edge nodes and portable electronics.

FAQ

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

The STM32F401RBT6TR achieves 84 MHz maximum CPU frequency using its internal PLL driven by either the 4–26 MHz external crystal or the 16 MHz internal RC oscillator. The ART Accelerator™ enables zero-wait-state execution from Flash at this speed, verified per DS9716 Rev 11 Section 3.2. This eliminates instruction fetch stalls, ensuring deterministic timing for real-time control loops without requiring external SRAM.

Does this MCU support USB device mode without external components?

Yes - the STM32F401RBT6TR integrates a full-speed USB 2.0 OTG controller with on-chip PHY, supporting device, host, and OTG roles. No external transceiver, termination resistors, or ESD protection diodes are required for basic USB CDC or HID operation, as confirmed in Section 1.2 and Table 1 of DS9716 Rev 11. Only standard USB connector and decoupling capacitors are needed.

How many I/O pins are available in the LQFP64 package and what voltage levels do they support?

The LQFP64 variant provides 50 general-purpose I/O pins (PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15, plus dedicated pins), all 5 V tolerant across the 1.7–3.6 V supply range. This is explicitly stated in Section 2.1 and Table 2 of DS9716 Rev 11, enabling direct interfacing with 5 V logic, sensors, or legacy peripherals without level shifters.

What low-power modes are supported and what is the lowest achievable current draw?

The device supports Run, Sleep, Stop (with Flash in deep power-down), and Standby modes. Minimum current draw is 10 µA typical at 25 °C in Stop mode with Flash powered down and RTC disabled, per Section 6.3.27 of DS9716 Rev 11. With RTC active and VBAT supplied, Standby draws 2.4 µA at 25 °C and 1.7 V - validated under specified test conditions in Table 29.