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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics STM32F405OEY6BTR

Name: STM32F405OEY6BTR
Brand: STMicroelectronics
SKU: STM32F405OEY6BTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32F405OEY6BTR

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 90-UFBGA, WLCSP

Datasheet:: STM32F405OEY6BTR.pdf

Description:: IC MCU 32BIT 512KB FLASH 90WLCSP

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Product details

Overview

STM32F405OEY6BTR from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 168 MHz (210 DMIPS), featuring 512 KB flash, 192+4 KB SRAM (including 64 KB CCM), dual CAN 2.0B interfaces, USB OTG HS/FS, and 10/100 Ethernet MAC with IEEE 1588v2 support - deployed in industrial gateways requiring real-time connectivity and deterministic communication.

For engineers reviewing the STM32F405OEY6BTR datasheet, STM32F405OEY6BTR pinout, STM32F405OEY6BTR application, or STM32F405OEY6BTR equivalent, key selection criteria include its 168 MHz Cortex-M4+FPU core, dual-CAN + Ethernet + USB OTG HS capability, WLCSP90 package footprint, and integrated ART Accelerator enabling zero-wait-state flash execution.

Technical Context

This MCU integrates an Adaptive Real-Time (ART) Accelerator for deterministic flash execution at 168 MHz, a multi-AHB bus matrix for concurrent peripheral access, and a dedicated DMA controller supporting 16 streams with FIFOs and burst transfers - enabling simultaneous high-bandwidth operations across Ethernet, USB OTG HS, and camera interface (DCMI).

The device implements dual CAN 2.0B controllers with time-triggered communication support, IEEE 1588v2 hardware timestamping in its Ethernet MAC, and a parallel 8–14-bit DCMI capable of 54 MB/s throughput - all synchronized via a flexible clock tree with four PLLs (main, audio, USB, and system).

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M4 with FPU and DSP instructions; enables floating-point math and signal processing without external coprocessor.
Max Clock Frequency	168 MHz with ART Accelerator; delivers 210 DMIPS and real-time determinism for control loops and protocol stacks.
Flash / RAM	512 KB flash + 192 KB SRAM + 4 KB backup SRAM + 64 KB CCM; supports large firmware images, dual-bank OTA, and low-latency data buffers.
Connectivity Peripherals	Dual CAN 2.0B, USB 2.0 OTG HS/FS (with ULPI & on-chip PHY), 10/100 Ethernet MAC with MII/RMII; enables converged industrial networking.
Analog Subsystem	Three 12-bit ADCs (2.4 MSPS each, 7.2 MSPS interleaved), two 12-bit DACs, temperature sensor, and true RNG; suitable for closed-loop analog I/O and secure boot.
Package	WLCSP90 (4.223 × 3.969 mm); ultra-compact footprint for space-constrained edge nodes and portable instrumentation.
Low-Power Modes	Sleep/Stop/Standby with VBAT RTC + 20×32-bit backup registers + optional 4 KB backup SRAM; supports battery-backed operation for >10-year retention.

Pinout & Package

STM32F405OEY6BTR uses the WLCSP90 (4.223 × 3.969 mm) package with 90 solder balls, optimized for high-density PCB layouts and thermal performance in compact industrial modules.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA, VSS, VSSA	Power supply and ground rails	Separate analog/digital domains ensure noise isolation for ADC/DAC accuracy; VDDA must be ≥ VDD for proper analog operation.
VCAP_1 / VCAP_2	Internal voltage regulator decoupling	Requires 2.2 µF X5R ceramic capacitors per pin; critical for stable 1.2 V core voltage under dynamic load.
PA0–PA15, PB0–PB15, etc.	General-purpose I/O ports	Up to 140 GPIOs with interrupt capability; 138 pins are 5 V-tolerant, simplifying level-shifting in mixed-voltage systems.
PH0/PH1	HSE oscillator input/output	Supports 4–26 MHz crystal; essential for Ethernet MAC timing, USB HS clock recovery, and precise RTC calibration.
PA11/PA12	USB FS D+/D−	Full-speed USB 2.0 transceiver with integrated PHY; enables HID, CDC, and DFU without external components.
OTG_HS_* pins	USB HS interface (ULPI)	Requires external ULPI PHY; enables 480 Mbps host/device/OTG operation for high-throughput data acquisition.
RMII_* pins	Ethernet MAC RMII interface	10/100 Mbps operation with 50 MHz reference clock; supports IEEE 1588v2 timestamping for time-sensitive networking (TSN).
CAN1_RX/CAN1_TX, CAN2_RX/CAN2_TX	Dual CAN 2.0B transceiver interfaces	Independent buses for redundant fieldbus communication or gateway bridging between CAN FD and legacy CAN networks.
DCMI_D0–D7, DCMI_HSYNC, VSYNC, PIXCLK	Parallel camera interface	8-bit or 14-bit mode up to 54 MB/s; supports CMOS image sensors in machine vision and barcode scanning applications.

Key Features

Feature	Design Value
ART Accelerator	Enables zero-wait-state execution from flash at 168 MHz, eliminating cache misses and jitter in real-time control tasks.
CCM RAM	64 KB tightly coupled memory accessible only by CPU (not DMA); ideal for critical stack, ISR context, or cryptographic keys.
Dual CAN + Ethernet	Hardware-accelerated CAN message filtering and Ethernet packet checksum offload reduce CPU load by >30% in gateway applications.
True Random Number Generator	FIPS-compliant entropy source used for secure key generation and TLS handshake randomness in embedded IoT deployments.
Flexible Static Memory Controller (FSMC)	Supports NOR/NAND/PSRAM/LCD with 8/16-bit data bus; enables direct attachment of external displays or code-execution-from-NOR.

Applications

Industrial Gateway

Machine Vision Edge Node

Use Scenario: Protocol translation between Modbus RTU, CANopen, and MQTT over Ethernet/Wi-Fi.

IC Role / Device Role / Timing Role: Central application processor managing dual CAN buses, 10/100 Ethernet MAC, and USB OTG HS for firmware updates.

Use Value: Integrated IEEE 1588v2 hardware timestamping ensures sub-microsecond synchronization across distributed PLCs and HMIs.

Use Scenario: Real-time barcode reading and defect detection using CMOS image sensor and local inference.

IC Role / Device Role / Timing Role: Image acquisition controller via DCMI, preprocessing unit with Cortex-M4 DSP instructions, and USB FS host for sensor configuration.

Use Value: 54 MB/s parallel camera interface and 7.2 MSPS triple-interleaved ADC enable high-frame-rate capture without external frame buffer.

Secure Field Controller

Audio Processing Module

Use Scenario: Tamper-resistant remote I/O module with encrypted firmware updates and secure boot.

IC Role / Device Role / Timing Role: Root-of-trust MCU executing signed firmware, generating session keys via TRNG, and validating certificates in hardware.

Use Value: 96-bit unique ID + OTP memory + hardware CRC unit provide immutable device identity and firmware integrity verification.

Use Scenario: Low-latency audio streaming and echo cancellation in VoIP endpoints or smart speakers.

IC Role / Device Role / Timing Role: Audio subsystem controller with I2S master/slave, audio PLL (PLLI2S), and dual 12-bit DACs for analog output.

Use Value: Dedicated audio PLL achieves <100 ps jitter for 192 kHz/24-bit playback, meeting studio-grade audio requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32F407VGT6	LQFP100 package (14 × 14 mm), 1 MB flash, same peripherals but larger footprint and higher pin count.	Better suited for prototyping and designs requiring more GPIOs or external SDRAM via FSMC.	Select when board space allows and full 1 MB flash or additional timers/ADC channels are needed.
STM32H743ZIT6	Cortex-M7 core @ 480 MHz, dual-core option, 2 MB flash, enhanced crypto accelerators, no DCMI.	Targeted at AI-on-edge and high-throughput motor control; lacks native camera interface but adds JPEG codec and DSI.	Choose for compute-intensive workloads where camera interface is not required and higher clock speed justifies cost increase.

Compared with STM32F407VGT6, the STM32F405OEY6BTR trades flash capacity and package size for ultra-compact WLCSP90 integration; versus STM32H743ZIT6, it retains DCMI and dual CAN while offering lower power and proven ecosystem maturity for industrial field devices.

Availability

STM32F405OEY6BTR is available at Aetrix Electronics and suitable for industrial gateways, machine vision edge nodes, secure field controllers, and audio processing modules requiring stable component supply across extended product lifecycles.

Supply support for STM32F405OEY6BTR 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 automotive semiconductors since 1987.

The STM32F4-series targets high-performance real-time embedded applications demanding DSP capability, rich connectivity, and industrial-grade reliability - especially where Ethernet, USB OTG, and dual CAN coexist in resource-constrained environments.

FAQ

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

The STM32F405OEY6BTR achieves 168 MHz via its Arm Cortex-M4 core with FPU, enabled by the Adaptive Real-Time (ART) Accelerator that eliminates flash wait states. This requires proper VCAP capacitor placement (2.2 µF per pin) and stable 1.8–3.6 V supply. The core delivers 210 DMIPS at this frequency, validated per Dhrystone 2.1 benchmark.

Does this MCU support hardware encryption or secure boot features?

While the STM32F405OEY6BTR lacks dedicated cryptographic accelerators (e.g., AES, PKA), it includes a true random number generator (TRNG), 96-bit unique ID, and 512-byte one-time-programmable (OTP) memory - enabling software-based secure boot with verified signature checking and key storage. External secure elements are recommended for FIPS-level compliance.

Can the WLCSP90 package be hand-soldered or reworked reliably?

The WLCSP90 (4.223 × 3.969 mm, 0.4 mm pitch) is not suitable for hand soldering due to ball grid array geometry and thermal sensitivity. Reliable assembly requires stencil printing, precise pick-and-place, and nitrogen-reflow profiling. Rework demands specialized BGA rework stations with infrared heating and vacuum pickup - typical yield drops below 70% without professional equipment.

How does the dual CAN interface differ from single-CAN variants in this family?

The STM32F405OEY6BTR integrates two independent bxCAN controllers (CAN1 and CAN2), each with its own message RAM, filters, and transmit/receive FIFOs - enabling simultaneous communication on separate buses (e.g., CANopen for motion control + J1939 for diagnostics). Unlike single-CAN parts, it avoids software arbitration bottlenecks and supports time-triggered CAN scheduling across both interfaces.

STM32F405OEY6BTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 90-UFBGA, WLCSP

Series:: STM32F4

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M4

Core Size:: 32-Bit Single-Core

Speed:: 168MHz

Connectivity:: CANbus, EBI/EMI, I2C, IrDA, LINbus, SPI, UART/USART, USB OTG

Peripherals:: Brown-out Detect/Reset, DMA, I2S, LCD, POR, PWM, WDT

Number of I/O:: 72

Program Memory Size:: 512KB (512K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 192K x 8

Voltage - Supply (Vcc/Vdd):: 1.8V ~ 3.6V

Data Converters:: A/D 13x12b; D/A 2x12b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32F405OEY6BTR FAQ

1.How can I place an order for STM32F405OEY6BTR through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32F405OEY6BTR 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 STM32F405OEY6BTR reliable?

The price and inventory of STM32F405OEY6BTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F405OEY6BTR is usually 5 days.

3.What payment methods are accepted for STM32F405OEY6BTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F405OEY6BTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32F405OEY6BTR?

STM32F405OEY6BTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32F405OEY6BTR 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 STM32F405OEY6BTR?

For technical support, including STM32F405OEY6BTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F405OEY6BTR requirements.

6.How does Aetrix verify that STM32F405OEY6BTR is sourced from the original manufacturer or authorized distributors?

All STM32F405OEY6BTR 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 STM32F405OEY6BTR meets industry standards.

7.What is the process for return or replacement of STM32F405OEY6BTR?

All STM32F405OEY6BTR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F405OEY6BTR, 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 STM32F405OEY6BTR part is unused and in its original packaging.

Return procedure for STM32F405OEY6BTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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