STMicroelectronics STM32F401CCY6TT

Overview

STM32F401CCY6TT 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 peripherals including 1×12-bit 2.4 MSPS ADC, USB 2.0 FS OTG, and up to 11 communication interfaces. It targets cost-sensitive, power-aware embedded applications such as smart sensors and industrial HMI.

For engineers reviewing the STM32F401CCY6TT datasheet, STM32F401CCY6TT pinout, STM32F401CCY6TT application, or STM32F401CCY6TT equivalent, key selection considerations include its WLCSP49 package, 1.7–3.6 V supply range, -40 °C to 85 °C operating temperature, ART Accelerator™ for zero-wait-state Flash execution, and 5 V-tolerant I/Os supporting rapid interface integration.

Technical Context

The device implements a full-featured Cortex-M4 core with hardware FPU and Memory Protection Unit (MPU), enabling deterministic real-time control and secure task isolation. Its Adaptive Real-time Accelerator (ART Accelerator™) eliminates Flash wait states across the full 84 MHz frequency range, ensuring consistent instruction throughput.

Clock architecture integrates multiple oscillators - 4–26 MHz external crystal, 16 MHz factory-trimmed RC, and 32 kHz RTC oscillator - with dual PLLs (main PLL and audio PLLI2S) supporting independent system and audio clock domains. Power management includes four low-power modes (Sleep, Stop, DeepStop, Standby) with sub-µA RTC backup current.

Key Specifications

Pinout & Package

STM32F401CCY6TT uses a 49-ball WLCSP (2.965 × 2.965 mm, 0.4 mm pitch) package optimized for space-constrained PCBs. Pin functions follow standard STM32F401xC ballout with dedicated VCAP pins for internal regulator stability, NRST for reset control, and VBAT for RTC backup.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F401CEU6, the STM32F401CCY6TT offers superior RTC accuracy and smaller footprint, while STM32F072CBT6 trades performance and feature depth for lower unit cost and power - making each optimal for distinct tiers of complexity and size requirements.

Availability

STM32F401CCY6TT is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical devices, smart home hubs, and PLC digital I/O modules requiring stable component supply across long production lifecycles.

Supply support for STM32F401CCY6TT 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 components for industrial, automotive, and consumer markets.

The STM32F4 series targets high-performance, cost-optimized embedded applications demanding DSP capability, rich connectivity, and energy efficiency - bridging the gap between entry-level Cortex-M0/M3 and high-end M7 derivatives.

FAQ

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

The STM32F401CCY6TT achieves 84 MHz maximum CPU frequency using its internal PLL driven by either the 4–26 MHz external crystal oscillator or the 16 MHz internal RC oscillator. The ART Accelerator™ ensures zero-wait-state execution from Flash memory at this speed, eliminating instruction fetch bottlenecks and maintaining deterministic timing critical for real-time control loops.

Does this MCU support USB device mode without external components?

Yes - the STM32F401CCY6TT integrates a full-speed USB 2.0 OTG PHY with internal transceivers, enabling USB device, host, or OTG operation using only standard USB connectors and minimal passive components (e.g., ESD protection diodes). No external PHY chip or crystal is required for basic CDC or HID class implementations.

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

All 81 GPIOs on the STM32F401CCY6TT are 5 V tolerant, meaning they safely accept input voltages up to 5.5 V regardless of VDD level (1.7–3.6 V). This eliminates external level shifters when interfacing with legacy 5 V peripherals like industrial sensors, displays, or logic ICs - reducing BOM cost, PCB area, and signal integrity risks in mixed-voltage systems.

What debug interfaces are supported and what are their practical implications?

The device supports Serial Wire Debug (SWD) and JTAG interfaces via dedicated SWCLK/SWDIO and TCK/TMS/TDO/TDI pins. SWD is preferred for production programming due to its 2-pin footprint and robustness; JTAG remains useful during early development for boundary scan testing and multi-core debugging. Both enable full memory access, real-time variable inspection, and non-intrusive breakpoint insertion without halting peripheral operation.