STM32H7A3RGT6 - 280MHz Cortex-M7 MCU with 1.4MB RAM | STMicroelectronics
MPN: STM32H7A3RGT6 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
Drop-in alternatives for STM32H7A3RGT6 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
STM32H743RGT6
β Drop-Inπ Reference alternative (not in catalog)
STM32H750RBT6
β Drop-Inπ Reference alternative (not in catalog)
STM32H753RGT6
β Drop-Inπ Reference alternative (not in catalog)
STM32H7A3RIT6
β Drop-Inπ Reference alternative (not in catalog)
STM32H7A3RGT6Q
β Drop-Inπ Reference alternative (not in catalog)
STM32H7A3RGT6 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M7 |
| Maximum Clock Speed | 280 MHz |
| Flash Memory | 2 MB |
| SRAM | 1.4 MB |
| Package | LQFP64 |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Operating Temperature Range | -40C to +85C |
| Number of I/O Pins | 50 |
| ADC Resolution | 16-bit |
| DAC Resolution | 12-bit |
| Communication Interfaces | Ethernet, USB, UART, SPI, I2C |
| Timers | Multiple 16-bit and 32-bit timers |
| Cryptographic Acceleration | Yes (hardware) |
| True Random Number Generator | Yes |
| RoHS Status | Compliant |
STM32H7A3RGT6 Pin Configuration
| Pin 1 | VBAT β Battery backup supply |
| Pin 2 | PC13 β GPIO / RTC output |
| Pin 3 | PC14 β GPIO / OSC32_IN |
| Pin 4 | PC15 β GPIO / OSC32_OUT |
| Pin 5 | PF0 β GPIO |
| Pin 6 | PF1 β GPIO |
| Pin 7 | NRST β Reset (active low) |
| Pin 8 | VDD β Digital power supply |
| Pin 9 | VSS β Ground |
| Pin 10 | PA0 β GPIO / ADC input |
| Pin 11 | PA1 β GPIO / ADC input |
| Pin 12 | PA2 β GPIO / USART2_TX |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
STM32H7A3RGT6 is suitable for 6 applications: Industrial Automation, Motor Control, Smart Home Devices, High-End Consumer Electronics, IoT Gateways, Medical Devices.
Industrial Automation
The STM32H7A3RGT6 is ideal for industrial automation due to its high processing power, large memory, and rich connectivity. Its 280 MHz Cortex-M7 core with FPU enables real-time control of complex processes, while the multiple UART, SPI, and I2C interfaces allow seamless integration with sensors and actuators. The device's support for external memory interfaces enables data logging and buffering for predictive maintenance systems. Its wide supply voltage range and robust design make it suitable for harsh industrial environments.
Recommended
Motor Control
The STM32H7A3RGT6 excels in motor control applications, leveraging its high clock speed and advanced timer peripherals to generate precise PWM signals. The Cortex-M7 core with double-precision FPU handles complex control algorithms like field-oriented control (FOC) with ease. The device's multiple ADCs enable accurate current and voltage sensing, while its rich communication interfaces support real-time monitoring and diagnostics. The large SRAM allows for efficient data buffering and algorithm execution, making it a top choice for high-performance motor drives.
Recommended
Smart Home Devices
The STM32H7A3RGT6 is well-suited for smart home devices, offering a balance of performance and power efficiency. Its low-power modes and wide supply voltage range support battery-operated devices, while its connectivity options (Ethernet, USB, UART, SPI, I2C) enable seamless integration into home networks. The device's security features, including hardware cryptographic acceleration, protect sensitive data in smart home applications. The Chrom-ART Accelerator enhances graphical user interfaces on connected displays, making it ideal for smart thermostats, security panels, and voice assistants.
Recommended
High-End Consumer Electronics
The STM32H7A3RGT6 is designed for high-end consumer electronics, such as smart speakers, gaming peripherals, and advanced wearables. Its 280 MHz Cortex-M7 core and large memory enable complex audio processing and real-time user interfaces. The device's rich peripheral set, including multiple timers and communication interfaces, supports a wide range of sensors and actuators. The Chrom-ART Accelerator and external memory interfaces allow for high-resolution graphics and smooth animations. Its security features ensure secure firmware updates and data protection, making it a reliable choice for premium consumer products.
Recommended
IoT Gateways
The STM32H7A3RGT6 is an excellent choice for IoT gateways, providing the processing power and connectivity needed to aggregate data from multiple sensors and devices. Its Ethernet and USB interfaces enable high-speed data transfer to the cloud, while its multiple UART, SPI, and I2C interfaces connect to various sensor nodes. The device's large memory supports data buffering and protocol stacks, and its security features ensure secure communication. The low-power modes help reduce energy consumption in always-on gateway applications.
Recommended
Medical Devices
The STM32H7A3RGT6 is suitable for medical devices that require high reliability and performance, such as patient monitors, infusion pumps, and diagnostic equipment. Its high clock speed and FPU enable real-time signal processing for accurate measurements. The device's rich analog peripherals, including ADCs and DACs, interface with sensors and actuators. The large memory supports complex algorithms and data logging. Its security features protect patient data, and its wide operating temperature range ensures reliable operation in clinical environments.
Recommended
Recommended Products Summary
Engineering reference data for STM32H7A3RGT6 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32H743RGT6 | STM32H750RBT6 | STM32H753RGT6 |
|---|---|---|---|---|
| Package | LQFP64 | LQFP64 | LQFP64 | LQFP64 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Maximum Clock Speed | 280 MHz | 480 MHz | 480 MHz | 480 MHz |
| Flash Memory | 2 MB | 2 MB | 128 KB | 2 MB |
| SRAM | 1.4 MB | 1 MB | 1 MB | 1 MB |
| Supply Voltage Range | 1.62V to 3.6V | 1.62V to 3.6V | 1.62V to 3.6V | 1.62V to 3.6V |
| Cryptographic Acceleration | Yes | Yes | Yes | Yes |
| TRNG | Yes | Yes | Yes | Yes |
Key Differentiators
- Larger SRAM (1.4 MB) compared to alternatives (vs STM32H743RGT6)
- Lower maximum clock speed (280 MHz) but lower power consumption (vs STM32H743RGT6)
- Same package and pin compatibility (vs STM32H750RBT6)
Design Notes
Ensure proper power supply decoupling with 100 nF capacitors close to each power pin and a 4.7 uF bulk capacitor. The device supports a wide supply voltage range of 1.62V to 3.6V, allowing flexible power design. For high-speed interfaces, follow the layout guidelines in the datasheet to maintain signal integrity.
For high-speed interfaces like Ethernet and USB, follow the layout guidelines in the datasheet to maintain signal integrity. Use controlled impedance traces and keep trace lengths matched. Place the crystal oscillator close to the MCU and ensure proper grounding.
The STM32H7A3RGT6 in LQFP64 package has a thermal resistance of approximately 45 C/W (theta_JA). At 280 MHz with full peripheral usage, power dissipation can reach 500 mW, resulting in a temperature rise of about 22.5C above ambient. Ensure adequate airflow or a thermal pad for high-temperature environments.
Compliance Information
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified - choose STM32H7A3RGT6Q for automotive.
