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STM32H523RET6

IC MCU 32BIT 512KB FLASH 64LQFP

Part Number: STM32H523RET6

Manufacturer: STMicroelectronics

Category: Microcontrollers

Package: 64-LQFP

Datasheet:: STM32H523RET6.pdf

Description: IC MCU 32BIT 512KB FLASH 64LQFP

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

STM32H523RET6 High-Performance Arm Cortex-M33 MCU with TrustZone, FPU, and DSP

A comprehensive technical overview of the STM32H523RET6, a high-performance microcontroller from STMicroelectronics featuring an Arm Cortex-M33 core with TrustZone, FPU, and DSP instructions, operating at up to 250 MHz with 512 KB of Flash memory and 272 KB of SRAM. Covers device function, core features, electrical specifications, 64-lead LQFP package, pin configuration, typical applications, and replacement selection guidance.

STMicroelectronics 64-LQFP (10mm × 10mm) 1.71V to 3.6V

Device Classification 32-bit Arm Cortex-M33 MCU

Part Number: STM32H523RET6

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +85°C

PRODUCT OVERVIEW

What Is the STM32H523RET6?

STM32H523RET6 is a high-performance microcontroller from STMicroelectronics belonging to the STM32H5 series, based on the Arm® Cortex®-M33 32-bit RISC core operating at frequencies up to 250 MHz[reference:0]. The Cortex-M33 core features a single-precision floating-point unit (FPU) that supports all Arm single-precision data-processing instructions and data types, along with a full set of DSP instructions and a memory protection unit (MPU) that enhances application security[reference:1].

The device embeds high-speed memories including 512 KB of dual-bank Flash memory with ECC and 272 KB of SRAM (80 KB SRAM2 with ECC), along with a flexible external memory controller (FMC) for devices with 100 pins and more, one OCTOSPI memory interface, and an extensive range of enhanced I/Os and peripherals connected to three APB buses, three AHB buses, and a 32-bit multi-AHB bus matrix[reference:2].

The STM32H523RET6 offers security foundation compliant with the Arm Trusted-Based Security Architecture (TBSA) requirements, featuring TrustZone® with Armv8-M mainline security extension, secure firmware installation, flexible life cycle management with multiple protection levels, and secure debug authentication[reference:3][reference:4]. The device operates from a 1.71 V to 3.6 V power supply[reference:5] and is offered in a 64-lead LQFP package with a 10.00mm × 10.00mm footprint, rated for operation from –40°C to +85°C[reference:6][reference:7]. The device is in active production.

High-Performance Cortex-M33 Core 250 MHz CPU with TrustZone, FPU, DSP instructions, and MPU. 375 DMIPS (Dhrystone 2.1).

Large Embedded Memory 512 KB dual-bank Flash with ECC and 272 KB SRAM (80 KB with ECC).

Advanced Security Arm TrustZone, secure firmware installation, flexible life cycle management, and secure debug authentication.

DEVICE HIGHLIGHTS

Key Features and Benefits of STM32H523RET6

Arm Cortex-M33 Core with TrustZone

32-bit RISC core operating at up to 250 MHz with single-precision FPU, full DSP instruction set, MPU, and Arm TrustZone security extension[reference:8].

Large Embedded Flash & SRAM

512 KB of dual-bank Flash memory with ECC and 272 KB of SRAM (80 KB with ECC), providing ample storage for complex applications[reference:9].

Advanced Security Features

TrustZone with Armv8-M security extension, secure firmware installation, flexible life cycle scheme, secure debug authentication, TRNG, and HASH accelerator[reference:10].

ART Accelerator & Cache

8 KB instruction cache enables 0-wait-state execution from Flash and external memories; 4 KB data cache for external memories[reference:11].

Rich Peripheral Set

Includes two 12-bit ADCs (up to 16 channels), two DAC channels, up to 11 timers, and extensive communication interfaces including I2C, I3C, SPI, USART, FDCAN, USB, and SDMMC[reference:12].

64-Lead LQFP Package

Available in a 64-lead LQFP package with a 10.00mm × 10.00mm footprint, 49 user I/Os, and 0.5 mm lead pitch[reference:13][reference:14].

REFERENCE DATA

Technical Specifications for STM32H523RET6

Part Number	STM32H523RET6	Manufacturer	STMicroelectronics
Device Type	32-bit Arm Cortex-M33 MCU	Core Architecture	Arm Cortex-M33 with TrustZone, FPU
Maximum Clock Frequency	250 MHz	Performance	375 DMIPS, 1023 CoreMark[reference:15]
Program Memory Size	512 KB Flash (dual-bank with ECC)	RAM Size	272 KB SRAM (80 KB with ECC)
OTP Memory	2 KB	Backup SRAM	2 KB[reference:16]
Number of I/O Pins	49	Package / Case	64-LQFP
Supplier Device Package	64-LQFP (10mm × 10mm)	Package Body Size	10.00mm × 10.00mm[reference:17]
Lead Pitch	0.5 mm	Mounting Type	Surface Mount
Supply Voltage Range	1.71 V to 3.6 V	ADC Resolution	12-bit
ADC Channels	16 Channels[reference:18]	DAC Channels	2 Channels[reference:19]
Number of Timers	Up to 11 (2×32-bit, 8×16-bit, 2×basic, 6×LP)	PWM Timers (Motor Control)	2×16-bit[reference:20]
Communication Interfaces	I2C, I3C, SPI, I2S, USART, UART, LPUART, FDCAN, USB, SDMMC[reference:21]	Security Features	TrustZone, TRNG, HASH, Secure Firmware Installation[reference:22]
Operating Temperature Range	-40°C to +85°C	Junction Temperature	Up to 130°C[reference:23]
Moisture Sensitivity Level	MSL 3	RoHS	ROHS3 Compliant (Ecopack2)[reference:24]
REACH Status	REACH Unaffected	SVHC	No SVHC (23-Jan-2024)[reference:25]
Packaging	Tray (960 per Tray)[reference:26]	Product Status	Active[reference:27]

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for STM32H523RET6

Power Supply & Clock Configuration

The STM32H523RET6 requires careful power supply and clock design:

Supply Voltage: 1.71 V to 3.6 V operating range; decouple each VDD pin with a ceramic capacitor as recommended in the datasheet[reference:28]
Independent Power Supplies: Analog independent supply input for ADC and DACs, 3.3 V dedicated supply for USB, dedicated supply for some GPIOs and SDMMC[reference:29]
Clock Sources: Internal oscillators: 64 MHz HSI, 48 MHz HSI48, 4 MHz CSI, 32 kHz LSI; External oscillators: 4-50 MHz HSE, 32.768 kHz LSE[reference:30]
VBAT Supply: Dedicated VBAT pin for RTC backup, 32 backup registers (32-bit), and 2 KB backup SRAM[reference:31]

PCB and Peripheral Guidance

MCU performance and reliability depend on layout and peripheral design:

Decoupling Capacitors: Place ceramic capacitors close to each VDD/VSS pair to minimize supply noise
Thermal Management: The LQFP package features an exposed pad; ensure proper soldering to the PCB for optimal thermal dissipation
Debug Interfaces: Supports Serial Wire Debug (SWD) and JTAG interfaces for programming and debugging
PCB Layout: Keep high-speed signal traces short and route with controlled impedance where required
Crystal Layout: Place external crystals close to the device with minimal trace lengths to ensure oscillator stability
Verify the recommended PCB footprint from the official datasheet prior to production

64-LEAD LQFP (10mm × 10mm)

Pin Configuration Reference for STM32H523RET6

STM32H523

LQFP TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The LQFP package has 64 pins with a 10.00mm × 10.00mm body size and 0.5 mm lead pitch. The device features 49 user I/O pins[reference:32][reference:33].

1 VBAT Backup power supply for RTC, backup registers, and backup SRAM

2 PC13 GPIO / RTC_TAMP1 / RTC_TS / RTC_OUT

3 PC14 GPIO / OSC32_IN (32.768 kHz crystal input)

4 PC15 GPIO / OSC32_OUT (32.768 kHz crystal output)

5 PF0 GPIO

6 PF1 GPIO

7 NRST Device reset input (active low)

8 VDD Digital power supply (1.71V to 3.6V)

9 VSS Digital ground

10 VDD Digital power supply (1.71V to 3.6V)

11 VSS Digital ground

12 PA0 GPIO / ADC1_IN0 / ADC2_IN0 / TIM2_CH1 / USART2_CTS

13 PA1 GPIO / ADC1_IN1 / ADC2_IN1 / TIM2_CH2 / USART2_RTS

14 PA2 GPIO / ADC1_IN2 / ADC2_IN2 / TIM2_CH3 / USART2_TX

15 PA3 GPIO / ADC1_IN3 / ADC2_IN3 / TIM2_CH4 / USART2_RX

16 PA4 GPIO / ADC1_IN4 / ADC2_IN4 / SPI1_NSS / I2C1_SCL

17 PA5 GPIO / ADC1_IN5 / ADC2_IN5 / SPI1_SCK

18 PA6 GPIO / ADC1_IN6 / ADC2_IN6 / SPI1_MISO / TIM3_CH1

19 PA7 GPIO / ADC1_IN7 / ADC2_IN7 / SPI1_MOSI / TIM3_CH2

20 PC4 GPIO / ADC1_IN14 / ADC2_IN14

21 PC5 GPIO / ADC1_IN15 / ADC2_IN15

22 PB0 GPIO / ADC1_IN8 / ADC2_IN8 / TIM3_CH3

23 PB1 GPIO / ADC1_IN9 / ADC2_IN9 / TIM3_CH4

24 PB2 GPIO / BOOT1

APPLICATION AREAS

Typical Applications for STM32H523RET6

Secure Industrial IoT & Edge Computing

TrustZone and advanced security features enable secure device identity and data protection for industrial IoT applications.

Motor Drive & Industrial Control

Dedicated PWM timers for motor control and high-performance CPU make this device ideal for precision motor drive applications[reference:34].

Medical & Healthcare Equipment

High performance and precision analog integration suitable for portable and stationary medical devices.

Secure Payment & POS Terminals

Advanced security features and tamper detection meet PCI requirements for point-of-sale applications[reference:35].

Building Automation & Smart City

Alarm systems, video intercom, HVAC control, and smart metering applications benefit from the rich peripheral set.

USB Type-C & Power Delivery Applications

Integrated USB Type-C and USB Power Delivery controller supports modern connectivity requirements[reference:36].

REPLACEMENT GUIDANCE

Selecting an Alternative for STM32H523RET6

A replacement for the STM32H523RET6 should not be selected solely by product category. The electrical characteristics, package, and pin configuration must be evaluated against the specific circuit requirements. The following alternatives are documented in the official STMicroelectronics product pages and datasheets.

Core: Arm Cortex-M33 with TrustZone and FPU at 250 MHz

Flash memory: 512 KB with ECC

SRAM: 272 KB (80 KB with ECC)

Package: 64-LQFP (10mm × 10mm)

Temperature range: –40°C to 85°C

Supply voltage: 1.71V to 3.6V

I/O count: 49

Security: TrustZone, secure firmware installation, TRNG

Family alternatives:

Part Number	Flash	Package	Packaging	Carrier Quantity
STM32H523RET6	512 KB	64-LQFP	Tray	960
STM32H523RET6TR	512 KB	64-LQFP	Tape & Reel	1,000
STM32H523RET7	512 KB	64-LQFP	Tray	960
STM32H523RET6	512 KB	64-LQFP	Tray	960
STM32H523CET6	512 KB	48-UFQFPN	Tray	-
STM32H533RET6	512 KB	64-LQFP	Tray	960

All alternative part numbers listed above are documented in the official STMicroelectronics product pages. The STM32H523RET6 is the 512 KB Flash version in 64-LQFP package with tray packaging (960 units per tray). For tape-and-reel packaging, consider STM32H523RET6TR[reference:37]. For the extended temperature version (-40°C to 105°C), consider STM32H523RET7[reference:38]. For a smaller package option with the same memory configuration, consider STM32H523CET6 (48-UFQFPN). For additional security features (ST-iRoT), consider the STM32H533RET6[reference:39]. Select based on package, temperature grade, packaging, and security requirements.

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MANUFACTURER INFORMATION

STMicroelectronics

The STM32H523 (STM32H523RET6) belongs to the STM32H5 series of high-performance microcontrollers from STMicroelectronics. The device is based on the high-performance Arm Cortex-M33 32-bit RISC core operating at frequencies up to 250 MHz[reference:40]. The STM32H523xx devices incorporate high-speed embedded memories (512 KB of Flash with ECC, 272 KB of SRAM) and an extensive range of enhanced I/Os and peripherals[reference:41]. The device offers a security foundation compliant with the Arm Trusted-Based Security Architecture (TBSA) requirements, featuring TrustZone, secure firmware installation, and flexible life cycle management[reference:42]. The STM32H5 series is designed for a wide range of applications including industrial IoT, motor control, medical equipment, and secure payment terminals.

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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Specifications

Product Attribute: Attribute Value

Part Number: STM32H523RET6

Manufacturer: STMicroelectronics

Package: 64-LQFP

Package/Case: 64-LQFP

Series: STM32H5

Packaging: Tray

Product Status: Active

Programmable: -

Core Processor: ARM® Cortex®-M33

Core Size: 32-Bit

Speed: 250MHz

Connectivity: CANbus, FIFO, I2C, IrDA, LINbus, MMC/SD/SDIO, SMBus, SPI, UART/USART, USB

Peripherals: Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT

Number of I/O: 49

Program Memory Size: 512KB (512K x 8)

Program Memory Type: FLASH

EEPROM Size: -

RAM Size: 272K x 8

Voltage - Supply (Vcc/Vdd): 1.71V ~ 3.6V

Data Converters: A/D 16x10b SAR

Oscillator Type: External, Internal

Operating Temperature: -40°C ~ 85°C (TA)

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package

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STM32H523RET6 Procurement and Technical Support

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Part Number: STM32H523RET6

Manufacturer: STMicroelectronics

Package: 64-LQFP

Category: Microcontrollers

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