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STMicroelectronics STM32F446RCT7
- Part No.:
- STM32F446RCT7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32F446RCT7.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,344
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Product details
Overview
STM32F446RCT7 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 systems requiring real-time analog acquisition and high-speed communication.
For engineers reviewing the STM32F446RCT7 datasheet, STM32F446RCT7 pinout, STM32F446RCT7 application, or STM32F446RCT7 equivalent, key selection criteria include its 180 MHz CPU clock with ART Accelerator for zero-wait-state flash execution, 114 GPIOs (112 5 V-tolerant), dual CAN 2.0B interfaces, and dedicated USB HS/FS PHYs supporting full-range supply operation (1.7–3.6 V).
Technical Context
The STM32F446RCT7 integrates an Arm Cortex-M4 core with hardware FPU and Memory Protection Unit (MPU), coupled with ST's Adaptive Real-Time (ART) Accelerator enabling deterministic 0-wait-state execution from flash at 180 MHz. 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, SPDIF-RX, and audio PLLs (PLLI2S/PLLSAI) for synchronized multi-channel audio processing in embedded media gateways.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and MPU; enables floating-point math and task isolation for safety-critical firmware. |
| Max Clock Speed | 180 MHz with ART Accelerator; delivers 225 DMIPS and deterministic real-time response from flash. |
| Memory | 512 KB flash + 128 KB SRAM + 4 KB backup SRAM; supports complex firmware, data buffering, and RTC-persistent storage. |
| ADC Performance | Three 12-bit ADCs, 2.4 MSPS each, 7.2 MSPS in triple interleaved mode; suitable for simultaneous multi-sensor sampling in motor drives. |
| USB Interfaces | Dual OTG: FS controller with integrated PHY + HS controller with dedicated DMA and ULPI; enables host/device/OTG roles with independent power rail support. |
| Timers & PWM | Up to 17 timers including two 32-bit advanced-control timers (TIM1/TIM8); provide six complementary PWM outputs with dead-time insertion for 3-phase inverter control. |
| I/O Capability | 114 GPIOs, 112 of which are 5 V-tolerant; allows direct interfacing with legacy industrial logic and sensors without level shifters. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad; compatible with standard reflow profiles and industrial PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Core & I/O power supply / ground | Dual power domains: VDD (1.7–3.6 V) powers core/peripherals; separate VDDA for analog circuits ensures ADC/DAC accuracy. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | 114 total GPIOs; 112 support 5 V tolerance, enabling robust interfacing with industrial 5 V buses and sensors. |
| PA9/PA10, PB14/PB15 | USB OTG FS D+/D− / USB OTG HS ULPI D0–D7 | Dedicated differential pairs for full-speed USB; ULPI interface pins allow external HS PHY integration with minimal routing complexity. |
| PA11/PA12 | USB OTG FS DM/DP | On-chip full-speed PHY eliminates need for external transceiver; simplifies BOM and board layout for USB device/host applications. |
| PC0–PC5 | ADC1_IN0–ADC1_IN5 | Five dedicated analog inputs for first ADC; support single-ended or differential sampling with programmable sampling time. |
Key Features
| Feature | Design Value |
|---|---|
| ART Accelerator | Enables zero-wait-state execution from flash at 180 MHz, eliminating cache misses and guaranteeing deterministic interrupt latency. |
| Flexible Memory Controller (FMC) | Supports external NOR/NAND flash, PSRAM, and SDRAM up to 16-bit bus width - extends code/data space for HMI or protocol stack buffering. |
| Dual Audio Subsystems | Two SAI interfaces + SPDIF-RX + PLLI2S/PLLSAI; enable simultaneous I2S input/output, TDM streaming, and consumer audio format decoding. |
| Low-Power RTC & Backup | Hardware calendar with subsecond accuracy + 20×32-bit backup registers + 4 KB backup SRAM powered by VBAT; retains state during main power loss. |
| Advanced Timer Architecture | TIM1/TIM8 support center-aligned PWM, break inputs, and programmable dead-time; essential for field-oriented control (FOC) in BLDC/PMSM drives. |
Applications
| Industrial Motor Drive | Medical Patient Monitor |
|---|---|
Use Scenario: Closed-loop control of 3-phase PMSM motors with current sensing, position feedback, and safety monitoring. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithm, managing ADC-triggered PWM updates at 20 kHz, and handling CAN-based diagnostics. Use Value: 180 MHz Cortex-M4+FPU computes vector transformations in <1 µs; triple ADC interleaving captures all three phase currents within one PWM period. |
Use Scenario: Multi-parameter vital sign acquisition (ECG, SpO₂, NIBP) with local display and wireless telemetry. IC Role / Device Role / Timing Role: Central data aggregator synchronizing analog front-end sampling, LCD refresh, and Bluetooth LE packet transmission. Use Value: Dual SAI + SPDIF-RX supports audio alarm playback and digital microphone input; 4 KB backup SRAM preserves patient session data during battery swaps. |
| Smart Energy Gateway | Audio DSP Node |
Use Scenario: Protocol translation between Modbus RTU (RS-485), M-Bus, and Ethernet/Wi-Fi for utility meter aggregation. IC Role / Device Role / Timing Role: Dual-CAN and four UARTs manage fieldbus communications; USB OTG HS hosts firmware update via flash drive. Use Value: 112 5 V-tolerant I/Os interface directly with RS-485 transceivers; dedicated USB HS PHY enables >30 MB/s firmware load without CPU overhead. |
Use Scenario: Real-time audio effects processing (reverb, EQ, compression) in portable speaker systems. IC Role / Device Role / Timing Role: Audio co-processor feeding I²S output to DAC while receiving I²S input from MEMS microphones. Use Value: PLLI2S generates precise audio clocks (e.g., 44.1/48 kHz); dual SAI supports full-duplex 8-channel TDM streams at 192 kHz sample rate. |
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 USB HS, only one SAI, 1 MB flash but same 192 KB RAM. | Lacks USB HS and dual SAI; unsuitable for high-bandwidth audio or dual-protocol gateways requiring HS USB host. | Select when cost-sensitive designs require only FS USB and basic audio I/O, with no need for HS peripheral bandwidth. |
| STM32H743VIT6 | Cortex-M7 core (480 MHz), dual-core option, 2 MB flash, 1 MB RAM, enhanced crypto, no SPDIF-RX. | Higher performance but lacks SPDIF-RX and has larger footprint; requires different power sequencing and toolchain setup. | Choose for compute-intensive tasks (e.g., AI inference at edge) where SPDIF is not required and BOM cost premium is acceptable. |
Compared with STM32F446RCT7, the STM32F407VGT6 trades USB HS and dual SAI for lower cost and broader legacy ecosystem support, while the STM32H743VIT6 delivers 2.7× higher CPU throughput at the expense of SPDIF-RX and increased design complexity - making the F446 optimal for balanced real-time audio + industrial connectivity.
Availability
STM32F446RCT7 is available at Aetrix Electronics and suitable for industrial motor control, medical monitoring equipment, smart energy gateways, and portable audio DSP nodes requiring stable component supply across extended production lifecycles.
Supply support for STM32F446RCT7 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 management ICs, sensors, and automotive-grade components.
The STM32F4 series targets high-performance embedded applications demanding real-time signal processing, rich connectivity, and industrial-grade reliability - with the F446 variant optimized for audio, motor control, and dual-protocol gateway use cases.
FAQ
What is the maximum operating temperature range for STM32F446RCT7?
The STM32F446RCT7 is rated for industrial temperature range: –40 °C to +85 °C ambient, validated per JEDEC JESD22-A104. Thermal derating begins above 70 °C ambient when operating at 180 MHz with all peripherals active; full specification compliance is guaranteed within the stated range.
Does STM32F446RCT7 support external memory expansion?
Yes - it integrates a Flexible Memory Controller (FMC) supporting 8-/16-bit NOR/NAND flash, PSRAM, and SDRAM (including LPSDR). The FMC provides dedicated address/data/control signals mapped to specific GPIO banks (e.g., PD0–PD15, PE0–PE7), enabling seamless expansion up to 1 GB address space.
How many independent PWM channels can be generated simultaneously?
Using TIM1 and TIM8 (advanced-control timers), the device supports up to 12 independent PWM outputs with complementary pairs and programmable dead-time. Combined with general-purpose timers (TIM2–TIM5, TIM12–TIM17), up to 36 PWM-capable channels are available - though only 12 support hardware dead-time insertion.
Is the internal 32 kHz LSE oscillator calibrated for RTC accuracy?
Yes - the LSE oscillator (32.768 kHz crystal input) is factory-calibrated to ±20 ppm over –40 °C to +85 °C, enabling subsecond RTC accuracy. An optional digital calibration register allows fine-tuning to ±5 ppm using temperature-compensated trimming, verified in application note AN4476.
STM32F446RCT7 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:
- 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:
STM32F446RCT7 FAQ
1.How can I place an order for STM32F446RCT7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F446RCT7 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 STM32F446RCT7 reliable?
The price and inventory of STM32F446RCT7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F446RCT7 is usually 5 days.
3.What payment methods are accepted for STM32F446RCT7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F446RCT7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F446RCT7?
STM32F446RCT7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F446RCT7 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 STM32F446RCT7?
For technical support, including STM32F446RCT7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F446RCT7 requirements.
6.How does Aetrix verify that STM32F446RCT7 is sourced from the original manufacturer or authorized distributors?
All STM32F446RCT7 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 STM32F446RCT7 meets industry standards.
7.What is the process for return or replacement of STM32F446RCT7?
All STM32F446RCT7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F446RCT7, 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 STM32F446RCT7 part is unused and in its original packaging.
Return procedure for STM32F446RCT7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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