STMicroelectronics STM32H503CBU6

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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series STM32H5
Packaging Tray | NULL
Core Processor ARM® Cortex®-M33
Core Size 32-Bit
Speed 250MHz
Connectivity CANbus, FIFO, I2C, IrDA, LINbus, SCI, SDIO, SMBus, SPI, UART/USART, USB
Peripherals Brown-out Detect/Reset, DMA, I2S, PDR, POR, PWM, SHA, TRNG, Voltage Detect, WDT
Number of I/O 35
Program Memory Size 128KB (128K x 8)
Program Memory Type FLASH
EEPROM Size -
RAM Size 32K x 8
Voltage - Supply (Vcc/Vdd) 1.71V ~ 3.6V
Data Converters A/D 10x12b SAR; D/A 1x12b
Oscillator Type External, Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 48-UFQFPN (7x7)
Package / Case 48-UFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The STMicroelectronics STM32H503CBU6 is a high-performance 32-bit MCU based on the ARM Cortex-M33 core at 250MHz. It features 128KB flash, 32KB RAM, and rich peripherals including DMA, I2S, PWM, SHA, TRNG, and voltage detect. Operating from 1.71V to 3.6V and -40°C to 85°C, it comes in a 48-UFQFN package, ideal for secure and fast embedded applications.

  • 250MHz Cortex-M33 – top-tier performance for compute-intensive tasks.
  • Hardware security (SHA, TRNG) – enables secure boot and data encryption.
  • Rich connectivity (I2S, DMA) – efficient data streaming and peripheral management.
  • Wide voltage range (1.71V-3.6V) – flexible power design for battery or USB.

Secure IoT Gateways

SHA and TRNG enable hardware-accelerated encryption for secure cloud communication.

Industrial Automation

250MHz Cortex-M33 handles complex PLC logic and real-time control with DMA.

Smart Meters

Low power modes and voltage detect ensure accurate billing data retention.

Audio Processing

I2S interface and high speed support digital audio effects and streaming.

Robotics

Fast PWM and DMA coordinate multi-axis motion with minimal CPU load.

Medical Wearables

Compact 48-QFN and 1.71V operation enable small, low-power health monitors.

Q: What core does this MCU use?
A: ARM Cortex-M33 at 250MHz.
Q: What security features are included?
A: SHA, TRNG, and voltage detect for secure operations.
Q: What is the memory configuration?
A: 128KB flash and 32KB RAM.
Q: What package is available?
A: 48-UFQFN with exposed pad.
Base Product Number : STM32H503CBU6
128KB flash 250MHz 32-bit MCU ARM Cortex-M33 industrial IoT QFN-48 security SHA TRNG
Q: What core does this MCU use?
A: ARM Cortex-M33 at 250MHz.
Q: What security features are included?
A: SHA, TRNG, and voltage detect for secure operations.
Q: What is the memory configuration?
A: 128KB flash and 32KB RAM.
Q: What package is available?
A: 48-UFQFN with exposed pad.