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STMicroelectronics STM32F446RCT7TR
- Part No.:
- STM32F446RCT7TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32F446RCT7TR.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,267
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Product details
Overview
STM32F446RCT7TR 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 CAN 2.0B interfaces - deployed in industrial motor control and audio processing systems requiring deterministic real-time response.
For engineers reviewing the STM32F446RCT7TR datasheet, STM32F446RCT7TR pinout, STM32F446RCT7TR application, or STM32F446RCT7TR equivalent, key selection criteria include ART Accelerator-enabled zero-wait-state flash execution, 112 5 V-tolerant I/Os, dual SAI for stereo audio routing, and dedicated USB HS DMA support across full-voltage range (1.7–3.6 V).
Technical Context
The device integrates an Adaptive Real-Time Accelerator (ART) enabling 0-wait-state execution from flash at 180 MHz, paired with a multi-AHB bus matrix for concurrent peripheral access. Its memory subsystem includes flexible external memory controller (FMC) supporting SDRAM, NOR/NAND, and PSRAM, plus Dual-mode QuadSPI for high-speed serial flash.
Timing architecture combines three independent PLLs - main PLL, audio PLL (PLLI2S), and SAI PLL (PLLSAI) - enabling simultaneous high-fidelity audio clocking (e.g., 44.1 kHz/192 kHz I²S) and system clock generation without jitter coupling. Debug infrastructure includes SWD/JTAG and Cortex-M4 Trace Macrocell™ for cycle-accurate profiling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 180 MHz max, 225 DMIPS - enables floating-point-intensive algorithms (e.g., motor FOC, FFT-based audio analysis) without external coprocessor. |
| Flash / RAM | 512 KB flash + 128 KB SRAM + 4 KB backup SRAM - supports complex firmware with bootloader, OTA update partition, and real-time data buffering. |
| ADC Performance | 3× 12-bit ADCs, 2.4 MSPS each; 7.2 MSPS in triple interleaved mode - captures synchronized multi-channel analog inputs (e.g., 3-phase motor currents) with sub-100 ns inter-channel skew. |
| USB Interfaces | OTG_FS (on-chip PHY) + OTG_HS (dedicated DMA + ULPI/PHY) - allows simultaneous host/device roles: FS for HID control, HS for high-bandwidth data streaming (e.g., USB audio class 2.0). |
| I/O Capability | Up to 112 5 V-tolerant pins, 90 MHz toggle rate - interfaces directly with legacy 5 V logic, sensors, and displays without level shifters in mixed-voltage industrial designs. |
| Audio Peripherals | 2× SAI, 4× I²S (muxed on SPI), SPDIF-RX, audio PLL - enables multi-format digital audio I/O (TDM, I²S, PCM) with independent clock domains for ASRC-free sample rate conversion. |
| Timers & PWM | 17 timers including 2× advanced-control (TIM1/TIM8) with dead-time insertion and complementary outputs - implements space-vector PWM for 3-phase inverters with hardware fault protection. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad. Pin count and function mapping validated per STMicroelectronics DS10693 Rev 11, Section 4 (Pinout and pin description).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD/VSS | Power supply / Ground | Dual 1.7–3.6 V core/analog domain supplies; 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; 112 support 5 V tolerance, 111 rated for 90 MHz toggling - enables direct connection to industrial I/O modules and display buses (8080/6800 LCD interface). |
| PA11/PA12 | USB FS D+/D− | Dedicated full-speed USB 2.0 transceiver with integrated PHY - eliminates external USB PHY; supports device/host/OTG with battery charging detection (BCD). |
| PA11/PA12 + ULPI | USB HS interface | High-speed operation via ULPI physical layer (12-bit parallel bus @ 60 MHz) - offloads USB protocol handling from CPU; supports HS host/device/OTG with dedicated DMA channel. |
| PC6–PC9 | SAI1 clock/data lines | Serial Audio Interface 1 with MCLK, FS, SCK, SD - supports master/slave TDM/I²S/PCM up to 32 channels; driven by PLLSAI for jitter-free audio clocks. |
Key Features
| Feature | Design Value |
|---|---|
| ART Accelerator | Eliminates flash wait states at 180 MHz, reducing code execution latency by >30% vs. non-accelerated Cortex-M4 - critical for time-critical ISR response in motor control loops. |
| Flexible Memory Controller (FMC) | Supports SDRAM (up to 32-bit bus), PSRAM, NOR/NAND flash - enables external frame buffer for TFT displays or large lookup tables for sensor calibration. |
| Dual SAI peripherals | Independent transmit/receive engines with FIFOs and DMA triggers - allows simultaneous playback (SAI1) and recording (SAI2) at different sample rates without CPU intervention. |
| Advanced Timers (TIM1/TIM8) | Built-in dead-time insertion, break input, and complementary PWM outputs - implements hardware-level fault shutdown for IGBT/MOSFET gate drivers in power converters. |
| Backup Domain | RTC with subsecond accuracy, 20×32-bit backup registers, 4 KB backup SRAM powered by VBAT - retains real-time clock and critical state during main power loss (e.g., smart meter tamper detection). |
Applications
| Industrial Motor Control | Professional Audio Equipment |
|---|---|
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase BLDC motors in HVAC compressors and servo drives. IC Role / Device Role / Timing Role: Real-time computation engine executing FOC algorithm, PWM generation, and current sensing via triple-interleaved ADCs. Use Value: 180 MHz core + ART Accelerator ensures <5 µs loop time; advanced timers provide hardware dead-time and fault shutdown for safe inverter operation. |
Use Scenario: Multi-channel digital mixer with low-latency effects processing and USB audio streaming. IC Role / Device Role / Timing Role: Audio hub managing I²S/SAI inputs from ADCs, DSP processing, and USB HS output to PC. Use Value: Dual SAI + audio PLLs enable independent clock domains for 44.1 kHz monitoring and 48 kHz USB streaming; 128 KB RAM buffers 500+ ms of stereo audio. |
| Medical Imaging Subsystem | Smart Energy Gateway |
Use Scenario: Ultrasound beamformer front-end with parallel ADC acquisition and real-time filtering. IC Role / Device Role / Timing Role: High-speed data acquisition controller interfacing with 8-channel ADCs and FPGA co-processor via FMC. Use Value: 7.2 MSPS triple-interleaved ADC sampling synchronizes echo returns; FMC supports FPGA register access and raw data transfer at >100 MB/s. |
Use Scenario: DIN-rail mounted energy meter aggregating data from CT sensors, PLC modems, and LTE modules. IC Role / Device Role / Timing Role: Secure communication gateway running DLMS/COSEM stack with hardware crypto acceleration and RTC-backed logging. Use Value: Dual CAN 2.0B interfaces connect to legacy building automation; 4 KB backup SRAM preserves metering logs during brownouts; VBAT RTC maintains time accuracy ±1 ppm. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F407VGT6 | Lower max frequency (168 MHz), no QuadSPI, single SAI, no SPDIF-RX, 1 MB flash but only 192 KB RAM | Suitable for cost-sensitive motor control without audio or high-speed serial flash needs | Select when USB HS, dual SAI, or QuadSPI are unnecessary and BOM cost is primary constraint. |
| STM32H743VIT6 | Cortex-M7 core (480 MHz), 2 MB flash, 1 MB RAM, dual-core (M7+M4), no ART but L1 cache; supports Octo-SPI and DSI | Targeted at high-end HMI and AI-edge inference where raw compute > real-time determinism | Choose when >200 DMIPS, large framebuffer, or dual-core isolation (e.g., safety monitor + application) is required. |
Compared with STM32F446RCT7TR, the STM32F407VGT6 trades audio/peripheral richness for lower unit cost, while the STM32H743VIT6 shifts focus from deterministic real-time latency to peak throughput and memory bandwidth - making the F446 optimal for balanced audio-motor-convergence applications.
Availability
STM32F446RCT7TR is available at Aetrix Electronics and suitable for industrial motor control, professional audio equipment, medical imaging subsystems, and smart energy gateways requiring stable component supply through 2026 and beyond.
Supply support for STM32F446RCT7TR 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM32F4 series targets high-performance real-time embedded applications demanding DSP capability, rich connectivity, and deterministic timing - with the F446 variant optimized for audio-motor convergence and USB HS integration.
FAQ
What is the maximum operating temperature for STM32F446RCT7TR?
The device is qualified for industrial temperature range: –40 °C to +85 °C ambient, with junction temperature limits defined in DS10693 Rev 11 Section 6.2. Thermal derating begins above 70 °C ambient when operating at 180 MHz with all peripherals active; PCB layout must include thermal vias under the exposed pad per ST AN4815 guidelines.
Does STM32F446RCT7TR support secure boot or cryptographic acceleration?
No hardware cryptographic accelerator (e.g., AES, PKA, HASH) is integrated. Secure boot relies on software-implemented mechanisms using read-out protection (RDP) Level 1 and option byte configuration. For hardware crypto, ST recommends STM32L4+, STM32H7, or dedicated secure elements like STSAFE.
Can the USB HS interface operate without an external ULPI PHY?
No. USB HS requires external ULPI PHY (e.g., SMSC USB334x, Microchip USB3320) connected to the dedicated ULPI bus (CK, DIR, NXT, STP, D0–D7). The on-chip HS PHY is not present - only OTG_FS includes integrated PHY. ULPI interface operates at 60 MHz with strict PCB length matching (<10 mm skew).
How many independent clock sources does the STM32F446RCT7TR support?
Five: HSE (4–26 MHz crystal), HSI (16 MHz RC, ±1%), LSE (32.768 kHz crystal), LSI (37 kHz RC), and PLL-derived clocks (main PLL, PLLI2S, PLLSAI). All can be selected as system clock source via RCC_CFGR register; LSE calibrates RTC with ±1 ppm accuracy using internal trimming.
STM32F446RCT7TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32F4
- Packaging:
- Tape & Reel (TR)
- 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:
- 256KB (256K 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:
STM32F446RCT7TR FAQ
1.How can I place an order for STM32F446RCT7TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F446RCT7TR 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 STM32F446RCT7TR reliable?
The price and inventory of STM32F446RCT7TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F446RCT7TR is usually 5 days.
3.What payment methods are accepted for STM32F446RCT7TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F446RCT7TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F446RCT7TR?
STM32F446RCT7TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F446RCT7TR 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 STM32F446RCT7TR?
For technical support, including STM32F446RCT7TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F446RCT7TR requirements.
6.How does Aetrix verify that STM32F446RCT7TR is sourced from the original manufacturer or authorized distributors?
All STM32F446RCT7TR 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 STM32F446RCT7TR meets industry standards.
7.What is the process for return or replacement of STM32F446RCT7TR?
All STM32F446RCT7TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F446RCT7TR, 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 STM32F446RCT7TR part is unused and in its original packaging.
Return procedure for STM32F446RCT7TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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