My Inquiry
My Account
STMicroelectronics STM32F401CBU3
- Part No.:
- STM32F401CBU3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32F401CBU3.pdf
- Description:
- IC MCU 32BIT 128KB FLSH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:374
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM32F401CBU3 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 84 MHz, featuring 128 KB Flash, 32 KB SRAM, one 12-bit 2.4 MSPS ADC (16 channels), USB 2.0 FS OTG controller with on-chip PHY, and 51 I/Os - deployed in portable medical sensors requiring deterministic real-time signal processing and low-power USB connectivity.
For engineers reviewing the STM32F401CBU3 datasheet, STM32F401CBU3 pinout, STM32F401CBU3 application, or STM32F401CBU3 equivalent, key selection criteria include Flash/SRAM sizing for firmware+buffering, USB OTG FS PHY integration eliminating external transceivers, 51 GPIO count with 5 V tolerance, and sub-10 µA Stop mode current for battery-backed operation.
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 in RTOS environments. Its clock system combines a 4–26 MHz external crystal oscillator, factory-trimmed 16 MHz RC, and 32 kHz RTC oscillator with calibration - supporting precise timekeeping and dynamic voltage/frequency scaling.
Power architecture includes three low-power modes (Stop with Flash in Deep Power Down, Standby, and Run), with measured currents of 10 µA typ (Stop, 25 °C), 2.4 µA (Standby, 25 °C, no RTC), and 128 µA/MHz (Run, peripherals off). The USB OTG FS controller operates in device/host/OTG roles using the integrated PHY, eliminating external components for full-speed enumeration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 84 MHz max, 105 DMIPS - enables floating-point math for sensor fusion without external coprocessor |
| Memory | 128 KB Flash + 32 KB SRAM - sufficient for BLE stack + application logic + 2 KB audio buffer in portable devices |
| ADC | 1×12-bit, 2.4 MSPS, 16-channel - supports simultaneous sampling of ECG leads at ≥1 kSPS with oversampling |
| USB Interface | USB 2.0 Full-Speed OTG with on-chip PHY - eliminates external transceiver, reduces BOM cost and PCB area |
| I/O Count | 51 GPIOs, all 5 V tolerant - simplifies interface to legacy peripherals and level-shifting-free sensor connections |
| Low-Power Modes | Stop mode down to 10 µA typ @25 °C - extends coin-cell life to >1 year in intermittent-sensing applications |
| Clock Sources | 4–26 MHz HSE, 16 MHz HSI ±1%, 32 kHz LSE with RTC calibration - ensures accurate timekeeping across temperature (-40 to 85 °C) |
Pinout & Package
STM32F401CBU3 is housed in a 48-pin UFQFPN (7 × 7 mm) package with 0.5 mm pitch, optimized for space-constrained portable electronics. Pin functions are validated per STMicroelectronics datasheet DS9716 Rev 11, Section 4 ("Pinouts and pin description").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.7–3.6 V) | Supplies core and I/O domains; requires local 100 nF + 4.7 µF decoupling per VDD/VSS pair |
| VSS | Ground reference | Must be connected to low-impedance ground plane; separate analog/digital VSS pins exist |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE1 | General-purpose I/Os | 51 total GPIOs; all support interrupt, most configurable as AF for USART/I2C/SPI/USB |
| PA11/PA12 | USB D+/D− | Dedicated full-speed USB OTG signals; internal pull-ups enabled via software for device mode |
| PC13–PC15 | RTC oscillator inputs | Connect to 32.768 kHz crystal; PC14/PC15 require 12 pF load capacitors for ±20 ppm accuracy |
| NRST | Active-low reset input | Externally driven reset with Schmitt trigger; internal pull-up ensures reliable startup without external resistor |
Key Features
| Feature | Design Value |
|---|---|
| ART Accelerator™ | Enables 0-wait-state Flash execution at 84 MHz - eliminates cache misses in deterministic control loops |
| 5 V-tolerant I/Os | All 51 GPIOs withstand 5.5 V - allows direct interfacing with 5 V sensors and logic without level shifters |
| USB OTG FS PHY | Integrated transceiver with internal termination - reduces component count by 6+ parts vs discrete PHY solutions |
| Batch Acquisition Mode (BAM) | Hardware-accelerated ADC data capture into DMA buffers - lowers CPU load during continuous sensor streaming |
| Temperature range | -40 °C to +85 °C industrial grade - qualified for wearable electronics operating in ambient and body-contact conditions |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
Use Scenario: Continuous ECG and SpO₂ acquisition in wrist-worn device powered by CR2032 battery. IC Role / Device Role / Timing Role: Primary MCU executing sensor driver, digital filtering, BLE packetization, and USB CDC for firmware updates. Use Value: 10 µA Stop mode current extends battery life to 14 months; integrated USB PHY enables field updates without dedicated programmer. | Use Scenario: Wireless vibration sensor node mounted on motor housing, reporting FFT-derived fault signatures via LoRaWAN. IC Role / Device Role / Timing Role: Real-time FFT engine using Cortex-M4 DSP instructions, triggered by accelerometer interrupt and synchronized to internal RTC alarm. Use Value: ART Accelerator enables 84 MHz FFT computation from Flash without stalls; 5 V-tolerant GPIOs interface directly to 5 V MEMS accelerometers. |
| Smart Home Hub Controller | Portable Diagnostic Tool |
Use Scenario: Central hub aggregating Zigbee, BLE, and proprietary 868 MHz sub-GHz sensor data, with local UI via SPI-driven OLED. IC Role / Device Role / Timing Role: Multi-protocol coordinator managing concurrent radio stacks and display refresh at 60 Hz. Use Value: 11 communication interfaces (3×I2C, 3×USART, 4×SPI, SDIO, USB) eliminate external bridge ICs; 32 KB SRAM buffers multi-radio packet queues. | Use Scenario: Handheld ultrasound probe with analog front-end, real-time beamforming, and USB video-class streaming to tablet. IC Role / Device Role / Timing Role: Data acquisition controller synchronizing ADC sampling, DMA transfer, and USB isochronous endpoint transmission. Use Value: 2.4 MSPS ADC + 16-stream DMA supports 12-bit, 1 MS/s sampling across 8 channels; USB FS OTG delivers 12 MB/s sustained bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F411CEU6 | 256 KB Flash, 128 KB SRAM, same 84 MHz M4 core, but 48-pin UFQFPN with 56 GPIOs | Higher memory headroom for dual-firmware OTA; supports larger crypto libraries | Select when firmware size exceeds 128 KB or when additional GPIOs simplify board routing |
| STM32L431CCU6 | Cortex-M4 with FPU, 200 µA/MHz Run, 300 nA Standby, but only 210 DMIPS and no USB PHY | Ultra-low-power focus: 30× lower Standby current than STM32F401CBU3, but requires external USB transceiver | Select for battery-only applications >5-year life where USB is secondary and external PHY is acceptable |
Compared with STM32F411CEU6, STM32F401CBU3 trades Flash/SRAM capacity for lower cost and smaller footprint; versus STM32L431CCU6, it prioritizes integrated USB and higher compute throughput over extreme low-power standby - making it optimal for cost-sensitive, USB-connected edge devices with moderate memory needs.
Availability
STM32F401CBU3 is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, smart home hubs, and portable diagnostic tools requiring stable component supply and long-term production support.
Supply support for STM32F401CBU3 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 ICs, sensors, and automotive chips with vertical fabrication capability.
The STM32F4-series targets high-performance embedded applications demanding DSP capability, rich connectivity, and real-time responsiveness - particularly in industrial automation, medical instrumentation, and consumer IoT endpoints.
FAQ
What is the maximum operating frequency and how is it achieved?
The STM32F401CBU3 achieves 84 MHz maximum CPU frequency using its internal PLL driven by the 4–26 MHz HSE crystal or 16 MHz HSI RC oscillator. The ART Accelerator™ enables zero-wait-state execution from Flash memory at this speed, verified per DS9716 Rev 11 Section 3.2. No external clock source beyond the required HSE/HSI is needed to reach rated performance.
Does STM32F401CBU3 support USB device mode without external components?
Yes. STM32F401CBU3 integrates a full-speed USB 2.0 OTG PHY with internal termination resistors and pull-up/pull-down control. When configured as a USB device, only a standard USB Type-A connector and 1.5 kΩ pull-up on D+ (controlled internally) are required - no external transceiver, resistors, or capacitors beyond standard USB layout rules.
How many ADC channels are accessible in the UFQFPN48 package?
The UFQFPN48 package exposes 16 ADC input channels: PA0–PA7, PB0–PB1, PC0–PC5, and PC10. All are validated in DS9716 Rev 11 Table 8 ("STM32F401xB/STM32F401xC pin definitions") and support 12-bit resolution at up to 2.4 MSPS aggregate sampling rate with DMA burst transfer.
What debug interfaces are supported and what pins do they use?
STM32F401CBU3 supports Serial Wire Debug (SWD) and JTAG via dedicated pins: SWDIO (PA13), SWCLK (PA14), and optional NJTRST (PB4). SWD is the recommended interface, requiring only two pins and offering full debug visibility including flash programming, breakpoints, and real-time variable monitoring per Section 3.30 of DS9716 Rev 11.
STM32F401CBU3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- Series:
- STM32F4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 84MHz
- Connectivity:
- I2C, IrDA, LINbus, SDIO, SPI, UART/USART, USB OTG
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 36
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.7V ~ 3.6V
- Data Converters:
- A/D 10x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F401CBU3 FAQ
1.How can I place an order for STM32F401CBU3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F401CBU3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32F401CBU3 reliable?
The price and inventory of STM32F401CBU3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F401CBU3 is usually 5 days.
3.What payment methods are accepted for STM32F401CBU3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F401CBU3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F401CBU3?
STM32F401CBU3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F401CBU3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32F401CBU3?
For technical support, including STM32F401CBU3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F401CBU3 requirements.
6.How does Aetrix verify that STM32F401CBU3 is sourced from the original manufacturer or authorized distributors?
All STM32F401CBU3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32F401CBU3 meets industry standards.
7.What is the process for return or replacement of STM32F401CBU3?
All STM32F401CBU3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F401CBU3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32F401CBU3 part is unused and in its original packaging.
Return procedure for STM32F401CBU3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32F401CBU3 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
