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STMicroelectronics STM32F446ZET6
- Part No.:
- STM32F446ZET6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 144-LQFP
- Datasheet:
-
STM32F446ZET6.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 144LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,920
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Product details
Overview
STM32F446ZET6 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 (7.2 MSPS in triple interleaved mode), and two 12-bit DACs - deployed in industrial motor control systems requiring real-time analog acquisition and high-speed communication.
For engineers reviewing the STM32F446ZET6 datasheet, STM32F446ZET6 pinout, STM32F446ZET6 application, or STM32F446ZET6 equivalent, key selection criteria include its 144-pin LQFP package, 114 GPIOs (111 at 90 MHz), dual CAN 2.0B interfaces, SAI/SPDIF audio subsystem, and flexible external memory controller supporting SDRAM/NOR/NAND - critical for HMI, audio gateway, and multi-protocol edge node designs.
Technical Context
The STM32F446ZET6 integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 180 MHz, alongside a dual-bank flash architecture supporting read-while-write and secure firmware updates. Its memory subsystem includes a multi-AHB bus matrix, 16-stream DMA with FIFOs, and a flexible memory controller (FMC) supporting SRAM, PSRAM, SDRAM/LPSDR, and NOR/NAND devices.
Timing and connectivity are managed via multiple clock domains: a main PLL with fractional divider, dedicated audio PLLs (PLLI2S/PLLSAI), and independent 32 kHz RTC oscillator with calibration. Communication is handled by twenty interfaces including 4× I²C, 6× USART/UART, 4× SPI (3 with muxed I²S), 2× SAI, 2× CAN, SDIO, CEC, SPDIF-RX, and dual USB OTG controllers - one with on-chip FS PHY, one with dedicated HS DMA and ULPI support.
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 co-processors. |
| Memory | 512 KB flash + 128 KB SRAM + 4 KB backup SRAM - supports complex firmware, bootloader, and data logging with RTC retention. |
| ADC | 3× 12-bit, 2.4 MSPS each; 7.2 MSPS triple interleaved - captures synchronized multi-channel analog signals for servo feedback or power quality monitoring. |
| USB | Dual OTG: FS controller with on-chip PHY + HS controller with dedicated DMA and ULPI - allows simultaneous device/host roles across speed tiers without bandwidth contention. |
| Timers | Up to 17 timers including 2× advanced-control (TIM1/TIM8), 12× general-purpose, 2× watchdog - delivers PWM generation, encoder input, and precise time-stamping for motion control. |
| I/O | 114 GPIOs, 111 rated at 90 MHz, 112 5 V-tolerant - simplifies level-shifting in mixed-voltage industrial I/O subsystems. |
| Package | LQFP144 (20 × 20 mm), RoHS-compliant, 0.5 mm pitch - compatible with standard PCB assembly and thermal management for convection-cooled enclosures. |
Pinout & Package
LQFP144 (20 × 20 mm) package with exposed thermal pad; 144 leads, 0.5 mm pitch, JEDEC MS-026AC compliant. Pinout validated per STMicroelectronics DS10693 Rev 11, Table 10 (STM32F446xx pin and ball descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD/VSS | Power supply / Ground | 1.7–3.6 V core/I/O rail; separate VCAP pins for internal regulator stability - requires 2.2 µF ceramic decoupling per VCAP. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | 114 total GPIOs with interrupt capability; most support 5 V tolerance and multiple alternate functions (AF0–AF15) - enables flexible peripheral mapping without board redesign. |
| PC13–PC15 | RTC oscillator inputs | Connect 32.768 kHz crystal for hardware calendar and subsecond-accurate timestamping - calibrated internal RC alternative available. |
| PA11/PA12 | USB FS D+/D− | Dedicated full-speed USB transceiver pins with integrated pull-ups - eliminates external PHY and reduces BOM cost for USB device applications. |
| OTG_HS pins (PB12–PB15, PI11) | USB HS interface | Supports ULPI physical layer or embedded HS PHY - enables high-bandwidth host/device operation (480 Mbps) for data acquisition or firmware update acceleration. |
Key Features
| Feature | Design Value |
|---|---|
| ART Accelerator™ | Enables 0-wait-state 180 MHz execution from flash - eliminates external SRAM for code storage while maintaining deterministic real-time response. |
| Dual USB OTG controllers | Independent FS and HS controllers with dedicated resources - allows concurrent USB device (e.g., CDC ACM) and host (e.g., mass storage) operation without CPU arbitration overhead. |
| Flexible Memory Controller (FMC) | 16-bit data bus supporting SDRAM, NOR, NAND, PSRAM - enables local framebuffer for LCD-TFT displays or external program/data storage in HMI applications. |
| Triple-interleaved ADC | 7.2 MSPS aggregate sampling across three 12-bit ADCs - captures synchronized voltage/current/temperature waveforms for closed-loop power converter control. |
| SAI + SPDIFRX + I²S | Two serial audio interfaces with SPDIF receiver and I²S master/slave modes - supports multi-format audio routing (TDM, PCM, I²S) in voice-enabled edge gateways. |
Applications
| Industrial Motor Control | Audio Gateway Node |
|---|---|
|
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase BLDC motors with current sensing, position feedback, and thermal monitoring. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithm, PWM generation, ADC sampling synchronization, and CAN-based command interface. Use Value: 180 MHz Cortex-M4+FPU processes vector math in <1 µs; triple-interleaved ADC captures all three phase currents simultaneously at 20 kHz. |
Use Scenario: Multi-protocol audio bridge connecting USB audio class devices, SPDIF sources, and I²S-connected codecs or amplifiers. IC Role / Device Role / Timing Role: Audio routing hub managing sample rate conversion, format translation (SPDIF ↔ I²S), and USB audio streaming. Use Value: Dual SAI peripherals handle independent TX/RX streams; audio PLLs (PLLI2S/PLLSAI) generate precise 44.1/48 kHz clocks with <50 ppm jitter. |
| HMI with TFT LCD | Smart Energy Metering |
|
Use Scenario: Graphical user interface with 8080-mode parallel LCD, capacitive touch, and local data logging. IC Role / Device Role / Timing Role: Display controller driving 480×272 RGB panel via 16-bit parallel interface while managing touch input and flash-based UI assets. Use Value: Dedicated LCD-TFT controller supports 24-bit color depth and DMA-driven frame updates; 512 KB flash stores bitmap assets and font libraries. |
Use Scenario: DIN-rail mounted electricity meter performing Class 0.5S active/reactive energy measurement with tamper detection and RS-485/IR communication. IC Role / Device Role / Timing Role: Metrology processor acquiring voltage/current via sigma-delta ADCs (external), computing energy values, and managing secure data reporting. Use Value: RTC with hardware calendar and 20×32-bit backup registers retain billing data during mains outage; 112 5 V-tolerant I/Os simplify isolation design for RS-485 transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F407VGT6 | Same Cortex-M4 core but no ART Accelerator, lower max frequency (168 MHz), no SPDIFRX or SAI, only single USB OTG (FS only), 1 MB flash/192 KB RAM. | Lacks audio-specific peripherals and dual-USB capability - unsuitable for audio gateway or high-fidelity HMI. | Select when cost-sensitive industrial control requires larger flash but no audio or HS USB. |
| STM32F746ZGT6 | Cortex-M7 core (216 MHz), L1 cache, Chrom-ART accelerator, single quad-SPI, no FMC, higher power consumption, 1 MB flash/320 KB RAM. | Better for GUI rendering and floating-point compute; lacks FMC and dual CAN - less optimal for external memory or dual-bus industrial networks. | Select for high-resolution graphics or AI inference at edge; avoid if SDRAM framebuffer or legacy NOR/NAND boot is required. |
Compared with STM32F407VGT6, the STM32F446ZET6 adds audio interfaces and dual USB OTG at lower power; versus STM32F746ZGT6, it retains FMC and dual CAN while offering better real-time determinism for motor control - making it optimal for mixed-signal industrial edge nodes.
Availability
STM32F446ZET6 is available at Aetrix Electronics and suitable for industrial motor control, audio gateway nodes, HMI with TFT LCD, and smart energy metering requiring stable component supply across extended product lifecycles.
Supply support for STM32F446ZET6 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 analog integration - with the F446 variant optimized for audio, motor control, and multi-interface edge nodes.
FAQ
What is the maximum operating temperature range for the STM32F446ZET6?
The STM32F446ZET6 is specified for industrial temperature range: –40 °C to +85 °C ambient, validated per DS10693 Rev 11 Section 6.3.1. Thermal derating begins above 70 °C ambient when operating at 180 MHz with full peripheral activation; junction temperature must remain below 125 °C under all conditions.
Does the STM32F446ZET6 support hardware encryption or secure boot?
No. The STM32F446ZET6 does not integrate hardware cryptographic accelerators (AES, PKA, HASH) or secure boot ROM. It relies on software-based security (e.g., ARM TrustZone-M is absent); secure firmware updates require external secure element or external flash with write protection.
Can the STM32F446ZET6 drive an external SDRAM directly?
Yes. Its Flexible Memory Controller (FMC) supports 16-bit SDRAM with row/column addressing, refresh control, and burst access - validated for Micron MT48LC4M32B2 and ISSI IS42S16400J devices per AN4761 and DS10693 Section 3.9.
How many independent CAN interfaces does the STM32F446ZET6 provide?
Two independent bxCAN 2.0B Active controllers, each with dedicated message RAM, filters, and transmit/receive FIFOs - enabling simultaneous CAN FD-capable communication on separate buses (e.g., motor control bus + diagnostics bus) without CPU polling overhead.
STM32F446ZET6 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F446ZET6 FAQ
1.How can I place an order for STM32F446ZET6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F446ZET6 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 STM32F446ZET6 reliable?
The price and inventory of STM32F446ZET6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F446ZET6 is usually 5 days.
3.What payment methods are accepted for STM32F446ZET6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F446ZET6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F446ZET6?
STM32F446ZET6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F446ZET6 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 STM32F446ZET6?
For technical support, including STM32F446ZET6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F446ZET6 requirements.
6.How does Aetrix verify that STM32F446ZET6 is sourced from the original manufacturer or authorized distributors?
All STM32F446ZET6 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 STM32F446ZET6 meets industry standards.
7.What is the process for return or replacement of STM32F446ZET6?
All STM32F446ZET6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F446ZET6, 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 STM32F446ZET6 part is unused and in its original packaging.
Return procedure for STM32F446ZET6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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