The STM32H503CBT6 is a high-performance 32-bit microcontroller manufactured by STMicroelectronics. Belonging to the STM32H5 series, this device is based on the Arm Cortex-M33 processor core operating at frequencies of up to 250MHz. It combines high-speed processing capabilities, integrated memory, advanced communication interfaces, and hardware security features, making it suitable for industrial control and sophisticated embedded applications.
The STM32H503CBT6 integrates 128KB of dual-bank Flash memory and 32KB of SRAM, providing sufficient storage and working memory for a wide range of embedded applications. Both Flash and SRAM incorporate Error Correction Code (ECC) functionality to improve data integrity and system reliability. The device also includes 2KB of backup SRAM and 2KB of one-time programmable (OTP) memory.
The Arm Cortex-M33 core features a single-precision floating-point unit (FPU), digital signal processing (DSP) instructions, and a memory protection unit (MPU). With a maximum operating frequency of 250MHz and an ART Accelerator featuring an 8KB instruction cache, the microcontroller delivers efficient processing performance for real-time control, data processing, and embedded computing applications.
For analog signal processing, the STM32H503CBT6 integrates a 12-bit analog-to-digital converter (ADC) supporting sampling rates of up to 2.5MSPS, a dual-channel 12-bit digital-to-analog converter (DAC), an operational amplifier, and an ultra-low-power comparator. It also incorporates a digital temperature sensor, providing flexible analog and measurement capabilities for embedded electronic systems.
The microcontroller features a comprehensive selection of communication interfaces, including two I2C interfaces, up to two I3C interfaces shared with I2C, three SPI interfaces, three USART interfaces, one low-power UART (LPUART), one FDCAN interface, and one USB 2.0 Full-Speed interface. These communication options enable integration with sensors, peripheral devices, industrial communication networks, and external processing systems.
The STM32H503CBT6 also incorporates multiple timer and control peripherals, including 16-bit and 32-bit general-purpose timers, a motor-control PWM timer, low-power timers, and watchdog timers. These functions support real-time control, motor management, pulse generation, and timing-sensitive embedded applications.
Security is another important feature of the STM32H5 architecture. The device integrates a hardware HASH accelerator supporting SHA-1 and SHA-2, HMAC functionality, a true random number generator (TRNG), a 96-bit unique device identifier, active tamper detection, and memory protection mechanisms. These features help developers implement secure embedded systems and protect sensitive application data.
The STM32H503CBT6 operates with a supply voltage range of 1.71V to 3.6V and supports an industrial operating temperature range of -40°C to +85°C. Multiple low-power operating modes, including Sleep, Stop, and Standby, help optimize energy consumption in battery-powered and energy-efficient applications.
The device is housed in a 48-pin LQFP package measuring 7 × 7 × 1.4mm, providing a compact surface-mount solution for embedded hardware designs. The package offers up to 35 general-purpose I/O pins, with most supporting 5V tolerance.
The STMicroelectronics STM32H503CBT6 combines 250MHz Cortex-M33 processing, integrated Flash and SRAM, advanced analog peripherals, extensive connectivity, and hardware security functions. It is suitable for industrial automation, embedded control systems, smart devices, motor control, and other high-performance microcontroller applications.
Key Features:
- Manufacturer: STMicroelectronics
- Part Number: STM32H503CBT6
- Product Series: STM32H5
- Product Type: 32-Bit Microcontroller (MCU)
- CPU Core: Arm Cortex-M33
- Maximum CPU Frequency: 250MHz
- Core Features: FPU / DSP / MPU
- Flash Memory: 128KB Dual-Bank Flash with ECC
- SRAM: 32KB with ECC
- Backup SRAM: 2KB
- OTP Memory: 2KB
- Supply Voltage: 1.71V to 3.6V
- General-Purpose I/O: Up to 35
- ADC: 12-Bit, Up to 2.5MSPS
- DAC: Dual-Channel 12-Bit
- Analog Peripherals: Operational Amplifier / Comparator
- Communication Interfaces: I2C / I3C / SPI / USART / LPUART / FDCAN / USB FS
- USB Interface: USB 2.0 Full-Speed
- Security Functions: HASH / HMAC / TRNG / Active Tamper
- Timers: Multiple 16-Bit and 32-Bit Timers
- Low-Power Modes: Sleep / Stop / Standby
- Operating Temperature: -40°C to +85°C
- Package Type: LQFP-48
- Number of Pins: 48
- Package Dimensions: 7 × 7 × 1.4mm
- Mounting Type: Surface Mount (SMD/SMT)
- Packaging: Tray
- Product Grade: Industrial Grade
Typical Applications:
- Industrial automation systems
- Embedded control systems
- Industrial communication equipment
- Motor control applications
- Smart electronic devices
- Sensor data acquisition systems
- Power management systems
- IoT embedded devices
- Digital control equipment
- Security-enabled embedded systems
- Consumer electronics
- Real-time processing applications
The STMicroelectronics STM32H503CBT6 provides a powerful combination of high-speed processing, flexible peripheral integration, and hardware security. Its Arm Cortex-M33 architecture, 128KB Flash memory, 32KB SRAM, and extensive communication interfaces make it a versatile microcontroller solution for industrial electronics manufacturers, embedded system developers, and electronic component procurement teams.
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