STMicroelectronics STM32F401CCY6BTR

Overview

STM32F401CCY6BTR from STMicroelectronics is an Arm® Cortex®-M4 32-bit microcontroller with FPU, delivering 105 DMIPS at 84 MHz, featuring 256 KB Flash, 64 KB SRAM, and integrated USB 2.0 FS OTG controller with on-chip PHY. It supports 1×12-bit 2.4 MSPS ADC (16 channels), up to 11 communication interfaces (including 3×I²C, 3×USART, 4×SPI), and operates across -40 °C to 85 °C with 1.7–3.6 V supply - deployed in industrial sensor nodes requiring real-time signal processing and USB connectivity.

For engineers reviewing the STM32F401CCY6BTR datasheet, STM32F401CCY6BTR pinout, STM32F401CCY6BTR application, or STM32F401CCY6BTR equivalent, key selection criteria include ART Accelerator™-enabled zero-wait-state Flash execution, 5 V-tolerant GPIOs (up to 78 at 42 MHz), low-power Stop mode (10 µA typ), RTC with subsecond accuracy, and WLCSP49 package constraints for space-constrained PCB layouts.

Technical Context

The device implements an Adaptive Real-time Accelerator (ART Accelerator™) that eliminates Flash wait states by caching instructions and data, enabling deterministic 84 MHz operation directly from embedded Flash memory. Its memory protection unit (MPU) enforces privilege levels and region-based access control for secure firmware partitioning.

Core peripherals include a multi-AHB bus matrix supporting concurrent DMA transfers, 16-stream general-purpose DMA with FIFOs and burst support, and nested vectored interrupt controller (NVIC) with 84 programmable interrupt lines - optimized for deterministic real-time response in closed-loop motor control and audio streaming applications.

Key Specifications

Pinout & Package

STM32F401CCY6BTR uses a 49-ball WLCSP (Wafer-Level Chip Scale Package) measuring 2.965 × 2.965 mm with 0.4 mm pitch, optimized for ultra-compact portable electronics. Pin assignment follows ST's standardized WLCSP49 layout with dedicated VCAP_1/VCAP_2 decoupling pins adjacent to VDD/VSS pairs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Cortex-M4 microcontroller applications.

Compared with STM32F401CCY6BTR, STM32F411CEU6 offers more Flash and higher clock headroom at the cost of package size and RTC retention capability, while STM32L431CCU6 trades USB/audio performance for extreme low-power efficiency - making the CCY6BTR optimal for space-constrained, USB-dependent edge nodes needing balanced compute and connectivity.

Availability

STM32F401CCY6BTR is available at Aetrix Electronics and suitable for industrial sensor nodes, USB audio peripherals, wearable health monitors, and smart home controllers requiring stable component supply and long-term production continuity.

Supply support for STM32F401CCY6BTR 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, and MEMS sensors for industrial, automotive, and consumer markets.

This part belongs to the STM32F4x1 mainstream Arm Cortex-M4 line, engineered for cost-sensitive, space-constrained applications demanding USB connectivity, analog sensing, and real-time responsiveness - not high-end graphics or Ethernet.

FAQ

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

The STM32F401CCY6BTR achieves 84 MHz maximum CPU frequency using its internal PLL driven by either the 4–26 MHz HSE crystal or 16 MHz HSI RC oscillator. The ART Accelerator™ enables zero-wait-state execution from Flash at this speed, eliminating instruction fetch stalls. System clocks for peripherals (e.g., APB1 at 42 MHz, APB2 at 84 MHz) are derived via programmable prescalers, and all timing specifications in Section 6.3.10 of DS9716 Rev 11 confirm stable operation at rated voltage and temperature.

Does this MCU support USB device mode without external components?

Yes - the STM32F401CCY6BTR integrates a full-speed USB 2.0 OTG PHY, allowing native USB device operation (e.g., CDC, HID, MSC) without external transceivers. Only standard USB termination (1.5 kΩ pull-up on DP) and ESD protection diodes are required. The USB_DP/USB_DM pins are dedicated and electrically compliant per USB 2.0 specification, verified in DS9716 Section 6.3.25 and UM1722 reference manual.

How many I/O pins are 5 V tolerant and what is their maximum toggle rate?

All 81 GPIO pins on the STM32F401CCY6BTR are 5 V tolerant when configured in input, output, or alternate function modes - confirmed in Section 6.3.16 of DS9716. Up to 78 of these support fast switching at 42 MHz (toggling every 23.8 ns), validated under VDD = 3.3 V and CL = 30 pF conditions. This allows direct interfacing with 5 V logic families and industrial sensors without level shifters.

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

The device supports Sleep, Stop (with Flash in deep power-down), and Standby modes. In Stop mode with Flash powered down and regulators disabled, typical current consumption is 10 µA at 25 °C (max 28 µA), per Section 6.3.27 of DS9716. Standby mode draws 2.4 µA at 25 °C without RTC, rising to 12 µA at 85 °C. These values assume proper configuration of PWR_CR register, VBAT connection, and unused I/Os set to analog input with no pull-ups.