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STMicroelectronics STM32F446ZET7
- Part No.:
- STM32F446ZET7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 144-LQFP
- Datasheet:
-
STM32F446ZET7.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 144LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,198
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Product details
Overview
STM32F446ZET7 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 RAM, dual USB OTG (FS/HS), three 12-bit ADCs (7.2 MSPS in triple interleaved mode), and two 12-bit DACs - deployed in industrial motor control, audio processing, and USB-connected embedded gateways.
For engineers reviewing the STM32F446ZET7 datasheet, STM32F446ZET7 pinout, STM32F446ZET7 application, or STM32F446ZET7 equivalent, key selection considerations include its 144-pin LQFP package, 114 GPIOs (112 5 V-tolerant), 20 communication interfaces (including dual CAN 2.0B, SAI, SPDIF-RX, SDIO), and ART Accelerator enabling zero-wait-state execution from flash.
Technical Context
The STM32F446ZET7 integrates an Adaptive Real-time Accelerator (ART Accelerator™) that eliminates flash wait states at 180 MHz, paired with a Memory Protection Unit (MPU) for secure task isolation in RTOS environments. Its dual-clock domain supports independent audio PLL (PLLI2S) and serial audio PLL (PLLSAI) for simultaneous high-fidelity I²S/SAI streaming and system timing.
It implements a multi-AHB bus matrix for concurrent peripheral access, with dedicated DMA channels for USB HS, SDIO, and camera interface (DCMI). The flexible memory controller (FMC) supports NOR/NAND/SDRAM, while QuadSPI enables secure XIP execution from external flash - critical for firmware integrity in field-upgradable devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 180 MHz max, 225 DMIPS - enables real-time DSP filtering and motor control algorithms without external coprocessor |
| Memory | 512 KB flash + 128 KB SRAM + 4 KB backup SRAM - sufficient for dual-bank firmware updates and retained context across Stop mode |
| ADC | 3× 12-bit, 2.4 MSPS each; 7.2 MSPS triple interleaved - supports simultaneous sampling of current/voltage/temperature in servo drives |
| USB | Dual OTG: FS (on-chip PHY) + HS (dedicated DMA + ULPI support) - allows concurrent device/host roles, e.g., USB-C DC power delivery negotiation + HID peripheral emulation |
| Timers | Up to 17 timers including 2× advanced-control (TIM1/TIM8) with dead-time insertion - essential for 3-phase inverter PWM generation with fault protection |
| I/O | 114 GPIOs, 112 5 V-tolerant, 90 MHz toggle rate - simplifies level-shifting in mixed-voltage industrial I/O subsystems |
| Connectivity | 2× CAN 2.0B, 4× USART, 4× SPI (45 Mbps), 2× SAI, SPDIF-RX, SDIO, CEC - meets automotive body electronics and pro-audio interconnect requirements |
Pinout & Package
LQFP144 (20 × 20 mm), 0.5 mm pitch, thermally enhanced with exposed thermal pad - compatible with standard reflow profiles and supports >2 W continuous dissipation under forced convection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD/VSS | Core & I/O supply rails | Dual 1.7–3.6 V domains enable low-power sensor interface (VDDA) and noise-isolated digital logic (VDD) |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O banks | 114 pins mapped across GPIOA–GPIOI; all support EXTI, most support AF functions - allows full peripheral remapping without PCB redesign |
| PC13–PC15 | RTC oscillator inputs | Support 32.768 kHz crystal with calibration - delivers ±1 ppm RTC accuracy over –40°C to +85°C for time-stamped logging |
| PA11/PA12 | USB FS D+/D− | On-chip full-speed PHY - eliminates external transceiver, reducing BOM cost and EMI footprint |
| OTG_HS_* (PB12–PB15, PI11) | USB HS interface | ULPI-capable; requires external PHY but enables 480 Mbps throughput for high-bandwidth data acquisition |
| PD0/PD1 | HSE_IN/HSE_OUT | 4–26 MHz crystal oscillator input - provides precise system clock source for USB SOF synchronization and audio sample rate stability |
Key Features
| Feature | Design Value |
|---|---|
| ART Accelerator™ | Enables zero-wait-state 180 MHz execution from internal flash - eliminates cache coherency issues and reduces boot latency vs. RAM-copied code |
| Dual USB OTG | Independent FS (integrated PHY) and HS (ULPI/DMA) controllers - supports simultaneous USB device (CDC ACM) and host (mass storage) operation |
| Flexible Memory Controller (FMC) | 16-bit bus supporting SDRAM, PSRAM, NOR/NAND - enables external frame buffer for TFT-LCD displays or large lookup tables for motor commutation |
| Triple-interleaved ADC | 7.2 MSPS aggregate sampling across 3× 12-bit ADCs - captures synchronized voltage/current waveforms for field-oriented control (FOC) without external ADC |
| SAI + SPDIF-RX | Two serial audio interfaces plus coaxial optical receiver - enables multi-format audio I/O (I²S, TDM, SPDIF) in VoIP gateways and digital mixers |
Applications
| Industrial Motor Control | Pro Audio Processing |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors in HVAC compressors and CNC spindles. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms via TIM1/TIM8 advanced timers with complementary PWM outputs and fast ADC sampling. Use Value: 180 MHz core + triple-interleaved ADC ensures sub-microsecond current loop response, meeting IEC 61800-3 EMC immunity requirements. | Use Scenario: Multi-channel digital mixer with analog input conditioning, effects processing, and SPDIF/I²S output. IC Role / Device Role / Timing Role: Simultaneous SAI (I²S master) and SPDIF-RX slave operation synchronized to PLLI2S, with DSP-accelerated FIR filtering in Cortex-M4 FPU. Use Value: Dual audio PLLs eliminate clock domain crossing jitter; 128 KB SRAM buffers 64-sample audio frames at 192 kHz. |
| USB-C Embedded Gateway | Smart Energy Metering |
Use Scenario: Field-deployable gateway aggregating Modbus RTU sensors via RS-485 and exposing data via USB CDC ACM to cloud edge compute. IC Role / Device Role / Timing Role: Dual-role USB OTG managing host-side sensor polling and device-side virtual COM port, with hardware CRC for Modbus packet integrity. Use Value: Integrated USB FS PHY reduces component count; 512 KB flash stores dual-application firmware (gateway + bootloader) with A/B update partitioning. | Use Scenario: DIN-rail energy meter with harmonic analysis, tamper detection, and DLMS/COSEM over PLC or RF mesh. IC Role / Device Role / Timing Role: High-precision metrology engine using 3× ADCs for simultaneous voltage, current, and neutral current sampling at 16 kHz. Use Value: 12-bit ADCs with 7.2 MSPS triple interleaving capture full-cycle waveforms for IEC 61000-4-7 Class A harmonic compliance without oversampling FPGA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F407VGT6 | No USB HS, no SPDIF-RX, 1 MB flash but only 192 KB RAM, no QuadSPI | Lacks audio-specific peripherals and high-speed connectivity; suitable for general-purpose HMI but not pro-audio or USB HS data loggers | Select when USB FS and basic CAN/UART suffice, and cost sensitivity outweighs need for audio/HS features |
| STM32H743ZIT6 | Cortex-M7 @ 480 MHz, 2 MB flash, 1 MB RAM, dual-core option, no SPDIF-RX but adds Ethernet MAC and JPEG codec | Higher performance and memory, but larger package (LQFP144 same pin count but different pinout), no native SPDIF-RX - requires external receiver | Select for AI-edge inference or rich GUI with external SDRAM; avoid if SPDIF-RX or strict pin compatibility with F446 layout is required |
Compared with STM32F407VGT6, the STM32F446ZET7 adds USB HS, SPDIF-RX, and QuadSPI for secure firmware expansion - making it superior for audio-adjacent industrial gateways. Against STM32H743ZIT6, it trades raw CPU throughput for lower power, deterministic latency, and integrated SPDIF-RX - ideal where real-time audio I/O dominates over compute density.
Availability
STM32F446ZET7 is available at Aetrix Electronics and suitable for industrial motor control, pro audio signal processing, and USB-C embedded gateways requiring stable component supply across extended product lifecycles.
Supply support for STM32F446ZET7 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 real-time embedded applications demanding DSP capability, rich connectivity, and robust peripheral integration - with the F446 variant optimized for audio, USB, and industrial control convergence.
FAQ
What is the maximum operating temperature range for STM32F446ZET7?
The STM32F446ZET7 is rated for industrial temperature range: –40°C to +85°C ambient, validated per JEDEC JESD22-A108. Thermal performance is specified with 20°C/W junction-to-case resistance in LQFP144 package, supporting sustained 180 MHz operation under forced-air cooling at 70°C ambient.
Does STM32F446ZET7 support hardware encryption acceleration?
No, the STM32F446ZET7 does not include a cryptographic processor (CRYP), hash processor (HASH), or true random number generator (RNG). For secure boot or TLS offload, external secure elements or software-based AES-128 (with known timing side-channel limitations) must be used - unlike STM32F412/F413 which integrate RNG and HASH.
Can the QuadSPI interface execute code directly from external flash (XIP)?
Yes, the Dual Mode QuadSPI interface supports Execute-in-Place (XIP) from external flash with configurable latency cycles and prefetch buffering. It operates in memory-mapped mode with ART Accelerator coherency, enabling seamless code execution from up to 256 MB of external flash without CPU intervention - verified in ST's AN4760 application note.
How many independent clock sources does STM32F446ZET7 provide for audio applications?
The STM32F446ZET7 provides three independent clock sources for audio: main PLL (PLL), audio PLL (PLLI2S), and serial audio PLL (PLLSAI). PLLI2S generates precise I²S clocks (e.g., 3.072 MHz for 48 kHz × 64), while PLLSAI supplies SAI asynchronous clocks - enabling simultaneous multi-rate audio streams (e.g., 44.1 kHz mic input + 48 kHz line output) without jitter coupling.
STM32F446ZET7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 144-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:
- 114
- 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 24x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F446ZET7 FAQ
1.How can I place an order for STM32F446ZET7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F446ZET7 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 STM32F446ZET7 reliable?
The price and inventory of STM32F446ZET7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F446ZET7 is usually 5 days.
3.What payment methods are accepted for STM32F446ZET7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F446ZET7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F446ZET7?
STM32F446ZET7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F446ZET7 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 STM32F446ZET7?
For technical support, including STM32F446ZET7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F446ZET7 requirements.
6.How does Aetrix verify that STM32F446ZET7 is sourced from the original manufacturer or authorized distributors?
All STM32F446ZET7 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 STM32F446ZET7 meets industry standards.
7.What is the process for return or replacement of STM32F446ZET7?
All STM32F446ZET7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F446ZET7, 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 STM32F446ZET7 part is unused and in its original packaging.
Return procedure for STM32F446ZET7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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