STM32H523RET6 - 250MHz Cortex-M33 MCU 512KB Flash | STMicroelectronics
MPN: STM32H523RET6 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.75 | $47.50 |
| 100 | $4.35 | $435.00 |
| 500 | $4.1 | $2,050.00 |
| 1,000 | $3.95 | $3,950.00 |
STM32H523RET6 Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals on one die, sitting at the top of the embedded hierarchy: MCU -> embedded processor -> system-on-chip -> semiconductor. The STM32H5 series belongs to STMicroelectronics' high-performance STM32 family, positioned for applications that need both compute throughput and hardware-based security.
Key features include the 250 MHz Cortex-M33 core with Arm TrustZone security, an 8-Kbyte instruction cache with ART Accelerator enabling near zero-wait-state flash execution, 512 Kbytes of on-chip flash, and 272 Kbytes of SRAM. The integrated FPU and MPU support real-time operating systems and safety-oriented software architectures.
Technically, the STM32H523xx line combines the ART Accelerator with a wide peripheral set typical of the STM32H5 series, including multiple communication interfaces, timers, and analog peripherals, all clocked from a flexible clock tree. According to STMicroelectronics, the family targets 375 DMIPS (Dhrystone 2.1) performance, making it suitable for compute-intensive embedded control while retaining low-power operating modes.
Typical applications include industrial automation and motor control, secure IoT edge nodes leveraging TrustZone, and consumer or medical devices requiring fast 32-bit processing. The LQFP64 package suits both hand-assembly prototypes and automated surface-mount production.
Design consideration: verify that the 512 Kbyte flash and 272 Kbyte RAM sizing matches your application footprint before layout, since smaller CE/C variants of the STM32H523xx family exist in different packages and memory densities.
This page synthesizes distributor pricing, drop-in alternatives, datasheet links, and practical design notes not found on any single manufacturer or distributor page.
Drop-in alternatives for STM32H523RET6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM32H563RET6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32H562RET6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32H523RET6TR
✅ Drop-In📋 Reference alternative (not in catalog)
STM32H562RIT6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32H563RIT6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32H533RET6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32H523RET6 Maximum Ratings & Electrical Characteristics
| Core | Arm Cortex-M33 with TrustZone and FPU |
| Core Size | 32-bit |
| Maximum Clock Frequency | 250 MHz |
| Performance | 375 DMIPS (Dhrystone 2.1) |
| Flash Memory | 512 KB (512K x 8) |
| SRAM | 272 KB |
| Instruction Cache | 8 KB with ART Accelerator |
| Security | Arm TrustZone, MPU |
| Series | STM32H5 |
| Package | 64-LQFP (10 x 10 mm) |
| Mounting Type | Surface Mount |
| Programmable | Yes (firmware, STM32Cube ecosystem) |
STM32H523RET6 64-lqfp (10 x 10 mm) Pin Configuration Guide
Pin configuration for STM32H523RET6 (64-lqfp (10 x 10 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for STM32H523RET6.
Refer to the datasheet for full pin configuration.
Typical Applications
STM32H523RET6 is suitable for 6 applications: Industrial Automation and Motor Control, Secure IoT Edge Devices, Consumer Electronics Controllers, Medical and Health Monitoring Devices, Communication and Networking Equipment, Test and Measurement Instrumentation.
Industrial Automation and Motor Control
The STM32H523RET6 fits industrial automation and motor-control nodes that need deterministic, high-throughput processing: its 250 MHz Cortex-M33 core delivers 375 DMIPS, enough headroom to run field-oriented control (FOC) algorithms, fieldbus protocol stacks, and diagnostic routines concurrently. The 512 Kbytes of flash holds complete application images including bootloader and parameter tables, while 272 Kbytes of SRAM supports large control buffers and communication frames. The 8-Kbyte ART-accelerated cache sustains near zero-wait-state execution from flash, tightening control-loop jitter. Typical deployment places the MCU between power-stage gate drivers and an industrial network interface, using its hardware timers for PWM generation. Unlike smaller F-series parts, the H523 performance margin allows firmware growth without a redesign.
Recommended
Secure IoT Edge Devices
The STM32H523RET6 is well suited to secure IoT edge nodes because its Arm Cortex-M33 core integrates TrustZone, an MPU, and hardware isolation between secure and non-secure firmware states. Cryptographic key material and secure-boot code can run in the secure world while the application runs non-secure, protecting against remote code injection - a defining requirement for connected industrial sensors, smart meters, and access-control devices. With 512 Kbytes flash and 272 Kbytes RAM, the device handles TLS stacks, OTA update images with double-buffering, and JSON/CBOR telemetry generation. The 250 MHz clock accelerates symmetric and hash operations implemented in software. Designs that later need a discrete secure element or Ethernet can migrate to pin-compatible STM32H562/563 RET6 variants on the same PCB footprint.
Recommended
Consumer Electronics Controllers
Consumer appliances, power tools, and white-goods controllers benefit from the STM32H523RET6 combination of high clock rate (250 MHz), generous 512 Kbyte flash for feature-rich UI and connectivity code, and a compact 10 x 10 mm LQFP64 package that keeps PCB cost low. The Cortex-M33 FPU accelerates sensor fusion and closed-loop control in brushless motor drives used in fans, pumps, and kitchen equipment, while 272 Kbytes of RAM buffers touch-sensing and display data. The 8-Kbyte ART-accelerated cache keeps flash execution efficient across wide temperature and voltage conditions typical of household environments. Its availability in tray and tape-and-reel formats supports both prototype builds and high-volume automated SMT lines without footprint changes.
Recommended
Medical and Health Monitoring Devices
Portable medical and health-monitoring equipment - diagnostic handhelds, vital-sign monitors, and lab instrumentation - uses the STM32H523RET6 where fast 32-bit signal processing and secure data handling must coexist. The 250 MHz Cortex-M33 with FPU performs digital filtering, FFT analysis, and calibration math on sensor streams in real time, while TrustZone and the MPU support patient-data protection and authenticated firmware updates expected in regulated products. The 512 Kbyte flash accommodates application code, lookup tables, and logging; 272 Kbytes RAM sustains multi-channel acquisition buffers. LQFP64 surface-mount construction supports compact, battery-powered form factors, and family pin compatibility with STM32H562/563 allows a performance or security upgrade without redesigning the carrier board.
Recommended
Communication and Networking Equipment
In communication equipment such as industrial gateways, module controllers, and bridge nodes, the STM32H523RET6 provides the processing core for protocol translation and packet handling at the edge. Its 375 DMIPS throughput and 272 Kbytes of RAM run communication stacks and buffering for serial, CAN, and other field interfaces; designs that require wired Ethernet can drop in the pin-compatible STM32H563RET6 without PCB changes, preserving the firmware investment across variants. The ART Accelerator and 8-Kbyte cache keep interrupt-heavy protocol code responsive, and TrustZone isolates network-facing code from control logic - a defense-in-depth pattern recommended for exposed devices. The 250 MHz core clock provides timing margin for future feature additions during the product life cycle.
Recommended
Test and Measurement Instrumentation
Bench instruments, data loggers, and sensor-conditioning modules use the STM32H523RET6 as the main controller where 250 MHz execution speed shortens measurement cycles and enables real-time self-calibration. The FPU handles float-heavy math for scaling and correction curves, while the 512 Kbyte flash stores calibration constants, UI firmware, and communication firmware in one image; 272 Kbytes of RAM supports waveform capture buffers. Hardware timers provide precise event timing and PWM stimulus generation for stimulus-response test routines. The LQFP64 (10 x 10 mm) footprint fits dense instrument main boards and supports both hand-soldered prototypes and volume production. According to the STM32H523xx datasheet, the ART-accelerated cache allows zero-wait-state flash execution, improving timing determinism in acquisition loops.
Recommended
Recommended Products Summary
Engineering reference data for STM32H523RET6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32H563RET6 | STM32H562RET6 | STM32H533RET6 |
|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | Arm Cortex-M33, TrustZone, FPU | Arm Cortex-M33, TrustZone, FPU | Arm Cortex-M33, TrustZone, FPU | Arm Cortex-M33, TrustZone, FPU |
| Max Clock Frequency | 250 MHz | 250 MHz | 250 MHz | 250 MHz |
| Ethernet MAC | No | Yes | No | No |
| Packaging Format | Tray (RET6) | Tray | Tray | Tray |
Key Differentiators
- Balanced 512 KB flash / 272 KB RAM at lowest H5 cost point (vs STM32H562RET6)
- No unnecessary networking silicon (vs STM32H563RET6)
- Maximum memory density within the H523 family (vs STM32H533RET6)
Design Notes
The LQFP64 0.5 mm pitch leads require solder-mask-defined or non-solder-mask-defined pads per the ST datasheet land-pattern recommendation; a standard STM32 LQFP64 footprint from your CAD library is typically compatible. Provide a solid ground plane under the 10 x 10 mm body and place 100 nF ceramic decoupling capacitors at each VDD/VSS pin pair, as close to the pins as possible, plus bulk capacitance at the supply entry. Verify pinout against the latest STM32H523xx datasheet revision before releasing the footprint, since ST occasionally renames alternate-function mappings between datasheet revisions.
Estimated: at 250 MHz full-speed operation, STM32H5-class core current is on the order of tens of milliamps - consult the datasheet power-consumption tables for exact figures at your VDD and clock configuration, as these values were not present in the verified data used here. Size the 3.3 V regulator for peak current including peripheral loads and GPIO sourcing. Use separate analog supply filtering if ADC performance matters, and observe ST's power-sequencing guidance for VDD/VDDA, which is identical across the pin-compatible STM32H562/563 RET6 variants.
Second-sourcing within the STM32H5 family is safe at the footprint level, but not at the firmware level without verification: the STM32H563 adds Ethernet and other peripherals whose clock-routing and pin-mux settings differ from the H523. If your roadmap allows swapping in STM32H562/563 RET6 parts, keep the pin-mux table parameterized in STM32CubeMX from day one. Also confirm flash density variant (RE = 512 KB) at order entry - the STM32H523 family includes smaller CE/C variants in different packages that are NOT drop-in replacements.
Compliance Information
Compliance status was not present in the verified web data. STMicroelectronics standard-product MCUs are generally RoHS/lead-free, but confirm on the official ST product page for STM32H523RET6 before using these values in documentation.
