STMicroelectronics STM32F401CBY6TT

Overview

STM32F401CBY6TT 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, one 12-bit 2.4 MSPS ADC (16 channels), and USB 2.0 FS OTG controller with on-chip PHY - deployed in industrial sensor nodes requiring real-time signal processing and low-power connectivity.

For engineers reviewing the STM32F401CBY6TT datasheet, STM32F401CBY6TT pinout, STM32F401CBY6TT application, or STM32F401CBY6TT equivalent, key selection criteria include ART Accelerator™-enabled zero-wait-state Flash execution, 5 V-tolerant GPIOs (up to 78 at 42 MHz), BAM (Batch Acquisition Mode) for sensor data burst capture, and integrated RTC with subsecond accuracy and VBAT backup support.

Technical Context

The STM32F401CBY6TT implements an Arm Cortex-M4 core with hardware FPU and Adaptive Real-time Accelerator (ART Accelerator™), enabling deterministic 0-wait-state execution from Flash memory up to 84 MHz. It integrates a multi-AHB bus matrix for concurrent peripheral access and supports dynamic voltage scaling across 1.7–3.6 V operation.

Its clock system includes four oscillators: 4–26 MHz HSE, 32 kHz LSE for RTC, factory-trimmed 16 MHz HSI, and calibrated 32 kHz LSI - all feeding into three PLLs (main, audio, and USB) for precise domain-specific frequency synthesis and jitter-controlled USB/SDIO timing.

Key Specifications

Pinout & Package

STM32F401CBY6TT is housed in a WLCSP49 (2.965 × 2.965 mm) package with 49 solder bumps, optimized for space-constrained portable and wearable electronics. Pin functions are defined per STM32F401xB/C datasheet Section 4 (Pinouts and pin description), with dedicated VCAP_1/VCAP_2 pins for internal regulator decoupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F401CBY6TT, the STM32F401CCU6 trades miniaturization and RTC completeness for easier assembly, while the STM32F411CEU6 adds analog generation capability at the cost of power efficiency and BAM-enabled low-power sensing - making the Y6TT optimal for size- and battery-constrained sensor endpoints.

Availability

STM32F401CBY6TT is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart home hubs, and PLC I/O modules requiring stable component supply, long-term lifecycle support, and ECOPACK2-compliant packaging.

Supply support for STM32F401CBY6TT 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 management ICs, MEMS, and automotive semiconductors since 1987.

The STM32F4 Series targets high-performance, energy-efficient embedded applications - specifically engineered for real-time control, signal processing, and connectivity in industrial, medical, and consumer edge devices.

FAQ

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

The STM32F401CBY6TT operates at up to 84 MHz with ART Accelerator™ enabled. At 3.3 V and 84 MHz, typical Run-mode current is 107 mA (128 µA/MHz) with peripherals off. This value scales linearly with voltage and clock speed, and drops to 42 µA in Stop mode with Flash retained.

Does STM32F401CBY6TT support USB device-only operation without external components?

Yes. The part integrates a full-speed USB 2.0 OTG PHY with internal transceivers on PA11 (D−) and PA12 (D+). No external resistors, capacitors, or PHY ICs are required for basic USB device operation, though a 1.5 kΩ pull-up on D+ is needed for enumeration.

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

All 42 GPIO pins on the WLCSP49 package are 5 V tolerant. Up to 78 I/Os (across full pinout variants) support 42 MHz toggle rates. In this package, PA0–PA15, PB0–PB15, PC0–PC15, and PD2 are available - with PA/PB banks rated for 42 MHz, PC/PD for 36 MHz per datasheet Table 66.

What RTC features are supported, and how is backup power managed?

The integrated RTC supports subsecond accuracy, hardware calendar (years/months/days/hours/min/sec), alarm, and periodic wakeup. VBAT powers RTC and 4 KB backup SRAM during main power loss. With 1 µA VBAT current, a CR1220 coin cell sustains RTC for >10 years at 25 °C.