Item specifics
Description
STM32H533RET6 Product Overview
When selecting an MCU for industrial edge AI, secure IoT terminals, or embedded applications requiring hardware-level security isolation, designers typically focus on three things: whether the compute can support lightweight inference, whether the security features meet compliance requirements, and whether the interfaces can connect directly to industrial fieldbuses. The STMicroelectronics STM32H533RET6 from the STM32H5 series was built for exactly that requirement.
The device features an Arm Cortex-M33 core with TrustZone security extension, FPU, and MPU, running at up to 250MHz with 375 DMIPS performance. It includes 8KB instruction cache and 4KB data cache for zero-wait-state execution from flash and external memories. Memory includes 512KB dual-bank flash with ECC (read-while-write capable), 272KB SRAM (including 80KB SRAM2 with ECC), and 2KB backup SRAM. Security features include Arm TrustZone, two AES coprocessors (one with DPA resistance), a public key accelerator, HASH hardware accelerator, true random number generator (NIST SP800-90B compliant), and ST-iROT preconfigured immutable root of trust.
Peripherals include 49 I/O ports, 2× 12-bit ADC units (16 channels), 2× 12-bit DAC, 4× SPI, 3× I²C, 1× I3C, 4× USART, 2× CAN FD, USB full-speed controller with PD, SD/SDIO/MMC interface, and Octo-SPI memory interface. Operating from 1.71V to 3.6V, it is rated for -40℃ to +85℃ in a LQFP-64(10×10) package.
STM32H533RET6 Key Specifications
| Item | Specification |
|---|---|
| Brand | STMicroelectronics |
| Model | STM32H533RET6 |
| Series | STM32H5 |
| CPU Core | Arm Cortex-M33 + TrustZone + FPU |
| Max Frequency | 250 MHz |
| Performance | 375 DMIPS (Dhrystone 2.1) |
| Program Memory | 512KB dual-bank Flash with ECC |
| RAM | 272KB SRAM (80KB SRAM2 with ECC) |
| Backup SRAM | 2KB |
| Data Flash Cycling | 100K cycles |
| Operating Voltage | 1.71V ~ 3.6V |
| I/O Count | 49 |
| ADC | 2 units × 16 channels (12-bit) |
| DAC | 2 channels (12-bit) |
| Connectivity | 4×SPI, 3×I²C, 1×I3C, 4×USART, 2×CAN FD |
| USB | 1× USB Full-Speed with PD |
| Memory Interface | Octo-SPI, SD/SDIO/MMC |
| Package | LQFP-64(10×10mm) |
| Operating Temp | -40℃ ~ +85℃ |
| Security | TrustZone, AES, PKA, HASH, TRNG, ST-iROT |
| Certifications | SESIP3, PSA Level 3 |
STM32H533RET6 Applications
Industrial edge AI and motor condition monitoring (vibration signal feature extraction and classification)
Smart home and building automation (HVAC systems, refrigerators, alarm systems)
Factory automation (PLCs, motor control, industrial pumps)
Smart city communication gateways and lighting control
IoT terminals requiring hardware-level security isolation
STM32H533RET6 election & Alternatives
Within the same STM32H5 family, the STM32H523RET6 is the closest alternative with the same LQFP-64 package and identical core specifications (Cortex-M33, 250MHz, 512KB Flash, 272KB RAM). The key difference is that the STM32H523 lacks the hardware crypto accelerators (AES, PKA, OTFDEC) and ST-iROT found on the STM32H533, making it suitable for cost-sensitive applications with lower security requirements. For larger flash requirements, consider the STM32H563RGT6 (1MB Flash, LQFP-64 package).
QIXINWEI (Shenzhen Qixinwei Technology Co., Ltd.) stocks these parts with same-week shipment from Shenzhen, and offers BOM sourcing plus PCBA customization from prototype to production. Share your BOM and we'll flag cross-references and long-lead items before they stall your build.
FAQ
Q: What advantages does the Cortex-M33 core offer over Cortex-M4?
A: The Cortex-M33 integrates Arm TrustZone security extension, enabling hardware-level secure/non-secure domain isolation for secure boot, secure firmware updates, and sensitive data protection. Its 250MHz frequency and 375 DMIPS performance can also support lightweight edge AI inference tasks.
Q: What security features are supported?
A: Arm TrustZone, two AES coprocessors (one DPA-resistant), public key accelerator (PKA), HASH hardware accelerator, true random number generator (NIST SP800-90B compliant), ST-iROT preconfigured immutable root of trust, and SESIP3 and PSA Level 3 security certification targets.
Q: What is the difference between STM32H533RET6 and STM32H523RET6?
A: Both share identical core parameters (CPU, frequency, Flash, RAM, package). The primary difference is that the STM32H533 integrates hardware crypto accelerators (AES, PKA, OTFDEC) and ST-iROT for stronger security, while the STM32H523 omits these crypto modules for lower cost.
Q: Is STM32H533RET6 suitable for edge AI applications?
A: Yes. The 250MHz Cortex-M33 core with FPU and 375 DMIPS can run lightweight edge inference models, such as vibration signal feature extraction and classification for motor condition monitoring. ST offers the NanoEdge AI Studio toolchain for rapid AI deployment on the NUCLEO-H533RE development board.