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STMicroelectronics STM32F446RET7
- Part No.:
- STM32F446RET7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32F446RET7.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:656
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Product details
Overview
STM32F446RET7 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 180 MHz (225 DMIPS), featuring 512 KB flash, 128+4 KB SRAM, dual USB OTG (FS/HS), three 12-bit ADCs (up to 7.2 MSPS in triple interleaved mode), and two 12-bit DACs. It targets high-performance embedded control in industrial HMI, motor drives, and audio-enabled IoT gateways.
For engineers reviewing the STM32F446RET7 datasheet, STM32F446RET7 pinout, STM32F446RET7 application, or STM32F446RET7 equivalent, key selection criteria include USB HS/FS dual-role capability, 17 timers (including advanced-control TIM1/TIM8), 20 communication interfaces (2× CAN 2.0B, 4× SPI, 2× SAI), and 114 I/Os with 90 MHz toggle rate and 5 V tolerance on 112 pins.
Technical Context
The STM32F446RET7 integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 180 MHz, paired with a Memory Protection Unit (MPU) for secure task isolation. Its multi-AHB bus matrix supports concurrent access to flash, SRAM, and peripherals without contention.
It features dual USB controllers - one full-speed OTG with on-chip PHY, another high-speed/full-speed OTG with dedicated DMA and ULPI support - plus dual SAI interfaces with independent audio PLLs (PLLI2S/PLLSAI) for synchronous stereo/multi-channel audio routing and sample-rate conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions; enables real-time signal processing (e.g., motor FOC, audio FFT) without external coprocessor. |
| Max Clock Frequency | 180 MHz; delivers 225 DMIPS (1.25 DMIPS/MHz), sufficient for deterministic control loops under 5 µs latency. |
| Memory | 512 KB flash (128-bit wide, ART-accelerated), 128 KB SRAM + 4 KB backup SRAM; supports firmware over-the-air (FOTA) with dual-bank update capability. |
| ADC Performance | Three 12-bit ADCs, 2.4 MSPS each; 7.2 MSPS aggregate in triple interleaved mode for synchronized multi-sensor acquisition (e.g., 3-phase current/voltage). |
| USB Interfaces | Dual USB OTG: FS controller with integrated PHY, HS controller with dedicated DMA and ULPI; enables simultaneous host/device roles and high-bandwidth data streaming (e.g., USB audio class 2.0). |
| Timers | Up to 17 timers: 2 watchdogs, SysTick, 12× 16-bit and 2× 32-bit general-purpose timers, plus TIM1/TIM8 advanced-control timers with complementary PWM outputs for 3-phase inverter gate driving. |
| I/O Capability | 114 GPIOs: 111 support 90 MHz toggle, 112 are 5 V-tolerant; allows direct interfacing with legacy 5 V logic and industrial sensors without level shifters. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature range (–40°C to +85°C).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VSS, VSSA | Power supply and ground rails | Separate analog/digital domains ensure clean ADC/DAC reference; VDDA must be ≥ VDD – 0.3 V for specified performance. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os with multiple alternate functions | Each pin supports up to 16 AF modes (e.g., USART1_TX on PA9, SPI1_MOSI on PA7); configurable pull-up/down, open-drain, or push-pull. |
| PC13–PC15 | RTC oscillator inputs | Support 32.768 kHz crystal for hardware calendar and subsecond RTC accuracy; includes calibration register for ±1 ppm trimming. |
| PA11/PA12 | USB FS DP/DM | Dedicated full-speed USB transceiver pins; internal PHY eliminates need for external USB transceiver IC in FS-only designs. |
| OTG_HS_* (PB12–PB15, PI11) | USB HS interface signals | ULPI interface pins (DATA0–DATA7, CLK, DIR, NXT, STP); require external ULPI PHY for HS operation (e.g., USB334x). |
Key Features
| Feature | Design Value |
|---|---|
| ART Accelerator™ | Enables 0-wait-state execution from flash at 180 MHz, eliminating external SRAM dependency for code storage and reducing BOM cost. |
| Flexible Memory Controller (FMC) | Supports NOR/NAND flash, PSRAM, and SDRAM up to 16-bit bus width; enables external display frame buffer or large data logging storage. |
| Dual SAI interfaces | Each supports I2S, PCM, and SPDIF formats with independent clocks; allows simultaneous playback (SAI1) and record (SAI2) paths with sample-rate independence. |
| QuadSPI interface | Dual-mode QuadSPI (memory-mapped or indirect) for fast XIP execution from external serial flash; reduces boot time and simplifies firmware updates. |
| DCMI interface | 8- to 14-bit parallel camera input up to 54 MB/s; supports OV7670 or AR0134 sensors for machine vision edge preprocessing. |
Applications
| Industrial Motor Control | Audio Gateway Node |
|---|---|
|
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase BLDC/PMSM motors in HVAC compressors or robotic joints. IC Role / Device Role / Timing Role: Real-time computation engine executing FOC algorithm, PWM generation via TIM1/TIM8, and current sensing via triple-interleaved ADC sampling. Use Value: 180 MHz core + 225 DMIPS ensures sub-5 µs loop execution; 5 V-tolerant I/Os interface directly with isolated gate drivers and Hall sensors. |
Use Scenario: Multi-protocol audio hub aggregating Bluetooth LE, USB Audio Class 2.0, and I2S from MEMS microphone arrays. IC Role / Device Role / Timing Role: Central audio processor managing SAI-based I2S ingress/egress, USB HS streaming, and PLL-driven clock domain bridging between 44.1/48/96 kHz sample rates. Use Value: Dual SAI + audio PLLs (PLLI2S/PLLSAI) enable simultaneous playback/recording with jitter-free synchronization; 512 KB flash stores multiple codec libraries. |
| Smart Energy Metering | HMI-Controlled PLC Edge Module |
|
Use Scenario: DIN-rail mounted electricity meter with harmonic analysis, tamper detection, and DLMS/COSEM over RS-485 and NB-IoT. IC Role / Device Role / Timing Role: High-precision metrology subsystem using triple ADCs for simultaneous voltage/current/neutral sampling, RTC-backed event logging, and secure firmware updates via USB/SDIO. Use Value: 12-bit ADCs with 7.2 MSPS aggregate rate capture 51st harmonic (2.55 kHz @ 50 Hz); 4 KB backup SRAM retains critical logs during power loss. |
Use Scenario: Local HMI panel for industrial PLCs, featuring capacitive touch GUI, real-time diagnostics, and Modbus TCP gateway functionality. IC Role / Device Role / Timing Role: Application processor running FreeRTOS with LCD-TFT controller (8080/6800 mode), Ethernet MAC (via external PHY), and dual CAN 2.0B for fieldbus interoperability. Use Value: Parallel LCD interface drives 480×272 displays at 60 fps; 20 communication interfaces eliminate need for protocol bridge ICs in multi-network deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-performance Cortex-M4 MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F407VGT6 | Same Cortex-M4 core but no USB HS controller, lower max frequency (168 MHz), 1 MB flash, no QuadSPI, only 1 SAI. | Lacks USB HS and dual SAI; suitable for cost-sensitive motor control where audio or high-speed data upload is unnecessary. | Select when USB HS bandwidth and multi-audio-path capability are not required; offers larger flash but fewer high-speed peripherals. |
| STM32H743VIT6 | Cortex-M7 core (480 MHz), dual-core option, 2 MB flash, 1 MB RAM, USB HS/FS, dual SAI, but no DCMI and higher power consumption. | Targeted at AI-edge inference and complex GUIs; requires more complex power design and lacks native camera interface. | Choose for applications needing >2× CPU throughput and large memory footprint, accepting higher BOM cost and thermal management complexity. |
Compared with STM32F407VGT6, the STM32F446RET7 adds USB HS, QuadSPI, and dual SAI at identical LQFP64 footprint - ideal for audio/data-rich edge nodes. Versus STM32H743VIT6, it trades raw M7 performance for lower power, smaller package, and integrated DCMI - better suited for compact, sensor-fused industrial controllers.
Availability
STM32F446RET7 is available at Aetrix Electronics and suitable for industrial motor control, audio gateway nodes, smart energy metering, and HMI-controlled PLC edge modules requiring stable component supply across extended product lifecycles.
Supply support for STM32F446RET7 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, specializing in microcontrollers, power management, sensors, and automotive ICs.
The STM32F4 series targets high-performance real-time embedded applications demanding DSP capability, rich connectivity, and robust peripheral integration - optimized for industrial automation, medical devices, and audio systems.
FAQ
What is the maximum operating temperature range for the STM32F446RET7?
The STM32F446RET7 is qualified for industrial temperature range: –40°C to +85°C ambient. This rating applies to all LQFP64 variants per ST's datasheet DS10693 Rev 11, Section 6.3.1. Thermal derating begins above 70°C ambient when operating at 180 MHz with full peripheral activation.
Does the STM32F446RET7 support hardware encryption acceleration?
No, the STM32F446RET7 does not integrate a cryptographic accelerator (e.g., AES, SHA, PKA). It relies on software libraries (STM32Cube HAL + mbed TLS) for encryption. For hardware crypto, consider STM32L4+, STM32F7, or STM32H7 series devices with dedicated crypto processors.
Can the STM32F446RET7 boot from external QuadSPI flash?
Yes - the STM32F446RET7 supports XIP (execute-in-place) boot from QuadSPI memory in memory-mapped mode. Boot mode pins (BOOT0/BOOT1) configure this behavior, and the system memory bootloader also supports QuadSPI firmware updates via USART or USB DFU.
How many independent clock sources does the STM32F446RET7 provide for audio applications?
The STM32F446RET7 provides three independent audio-capable clock sources: main PLL (PLL), audio PLL (PLLI2S), and SAI PLL (PLLSAI). Each can be configured for different sample rates (e.g., 44.1 kHz and 48 kHz simultaneously), enabling asynchronous audio routing without jitter accumulation.
STM32F446RET7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32F4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 180MHz
- Connectivity:
- CANbus, EBI/EMI, I2C, IrDA, LINbus, SAI, SD, SPDIF-Rx, SPI, UART/USART, USB, USB OTG
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, LVD, POR, PWM, WDT
- Number of I/O:
- 50
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.7V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F446RET7 FAQ
1.How can I place an order for STM32F446RET7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F446RET7 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 STM32F446RET7 reliable?
The price and inventory of STM32F446RET7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F446RET7 is usually 5 days.
3.What payment methods are accepted for STM32F446RET7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F446RET7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F446RET7?
STM32F446RET7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F446RET7 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 STM32F446RET7?
For technical support, including STM32F446RET7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F446RET7 requirements.
6.How does Aetrix verify that STM32F446RET7 is sourced from the original manufacturer or authorized distributors?
All STM32F446RET7 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 STM32F446RET7 meets industry standards.
7.What is the process for return or replacement of STM32F446RET7?
All STM32F446RET7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F446RET7, 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 STM32F446RET7 part is unused and in its original packaging.
Return procedure for STM32F446RET7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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