STMicroelectronics STM32F401CDY6TR

Overview

STM32F401CDY6TR from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, delivering 105 DMIPS at 84 MHz, featuring 384 KB flash, 96 KB SRAM, 1×12-bit 2.4 MSPS ADC, and USB OTG FS controller with on-chip PHY - deployed in industrial HMI front-ends requiring real-time sensor fusion and local UI rendering.

For engineers reviewing the STM32F401CDY6TR datasheet, STM32F401CDY6TR pinout, STM32F401CDY6TR application, or STM32F401CDY6TR equivalent, key selection criteria include Flash/SRAM sizing for firmware+RTOS footprint, 5 V-tolerant I/O count for legacy bus interfacing, low-power Stop mode current (10 µA), USB device/host capability, and UFQFPN48 package thermal performance in space-constrained enclosures.

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 RTOS task isolation. Its clock system includes dual oscillators (4–26 MHz HSE + 32 kHz LSE) and internal RC sources calibrated for RTC and system startup.

Peripheral architecture features a multi-AHB bus matrix supporting concurrent DMA transfers across 16-stream controllers, while the NVIC handles up to 81 interrupt-capable GPIOs - all 5 V-tolerant - and supports advanced timer functions including quadrature encoder input and PWM generation with dead-time insertion.

Key Specifications

Pinout & Package

STM32F401CDY6TR uses the UFQFPN48 (7 × 7 mm) package with 48 pins, optimized for compact industrial control modules and wearable medical interfaces. Thermal resistance θ_JA = 41.5 °C/W enables reliable operation at 84 MHz under natural convection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F401CEU6, STM32F401CDY6TR offers identical feature set in a thermally superior UFQFPN48 package with VBAT support, while STM32F411CEU6 trades USB integration for higher clock speed and memory - making STM32F401CDY6TR optimal for USB-centric, space-constrained, battery-aware designs.

Availability

STM32F401CDY6TR is available at Aetrix Electronics and suitable for industrial HMI controllers, smart sensor nodes, USB firmware updaters, and motor control edge nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32F401CDY6TR 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 sensors, and automotive-grade components.

The STM32F4 series targets high-performance embedded applications demanding DSP capability, rich connectivity, and deterministic real-time behavior - especially in industrial automation, medical devices, and consumer electronics with graphical interfaces.

FAQ

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

The STM32F401CDY6TR 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 enables zero-wait-state execution from flash memory at this speed, eliminating performance penalties from flash latency. This frequency is validated across the full temperature and voltage range (1.7–3.6 V).

Does this MCU support USB device mode without external components?

Yes. STM32F401CDY6TR integrates a full-speed USB 2.0 transceiver (PHY) compliant with USB specification 2.0. It supports device, host, and OTG modes using only passive components: a 1.5 kΩ pull-up resistor on PA12 (DP) for device enumeration and standard USB termination. No external PHY or level-shifting IC is required.

How many I/O pins are 5 V-tolerant and why does that matter?

All 78 fast I/O pins on STM32F401CDY6TR are 5 V-tolerant, meaning they safely accept 5 V logic signals while powered from a 3.3 V supply. This eliminates the need for external level shifters when interfacing with legacy 5 V peripherals such as RS-485 transceivers, industrial PLC I/O modules, or discrete logic families - reducing BOM cost and design complexity.

What low-power modes are available and what are their typical current draws?

Three primary low-power modes are supported: Run mode (146 µA/MHz), Stop mode (10 µA typical with Flash in Deep power down), and Standby mode (2.4 µA at 25 °C without RTC). Stop mode retains SRAM and register contents with fast wake-up (<5 µs), while Standby mode powers down most circuitry except the RTC and backup registers - ideal for long-term battery operation.