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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics STM32H523ZCJ6

Name: STM32H523ZCJ6
Brand: STMicroelectronics
SKU: STM32H523ZCJ6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32H523ZCJ6

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: -

Datasheet:: STM32H523ZCJ6.pdf

Description:: IC MCU 32BIT 256KB FLSH 144UFBGA

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Inventory:3,850

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Product details

Overview

STM32H523ZCJ6 from STMicroelectronics is a production-grade Arm® Cortex®-M33 32-bit microcontroller with TrustZone® security, FPU, and 250 MHz max clock. It integrates 512 Kbytes of ECC-protected flash (dual-bank RWW), 272 Kbytes of SRAM (80 Kbytes with ECC), and supports secure firmware installation (SFI) and PSA Level 3 certification. It targets secure industrial edge nodes requiring real-time control, cryptographic acceleration, and low-power operation.

For engineers reviewing the STM32H523ZCJ6 datasheet, STM32H523ZCJ6 pinout, STM32H523ZCJ6 application, or STM32H523ZCJ6 equivalent, key selection criteria include TrustZone-aware peripheral configuration, dual-bank flash for seamless OTA updates, 250 MHz deterministic execution with ART cache, and hardware-accelerated ECDSA/SHA-3 for secure boot and firmware validation.

Technical Context

The STM32H523ZCJ6 implements a full Armv8-M mainline security architecture with configurable SAU regions and TrustZone-aware peripherals including GTZC-managed memories, RCC, GPIOs, and FMC. Its dual-core debug infrastructure supports authenticated SWD/JTAG access with flexible life-cycle states (Secure/Non-Secure/Disabled).

It features two independent DMA controllers (GPDMA1/GPDMA2), each with dual-port capability and FIFO buffering, enabling concurrent offloading of ADC, SPI, and USB transfers without CPU intervention. The ART Accelerator includes separate 8-Kbyte instruction cache and 4-Kbyte data cache - the former enables zero-wait-state execution from internal flash, while the latter accelerates external memory accesses for PSRAM/NOR.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M33 with TrustZone, FPU, MPU, 250 MHz max - delivers 375 DMIPS and 1023 CoreMark for deterministic real-time control in secure contexts.
Memory	512 Kbytes flash (ECC, dual-bank RWW, 100K-cycle data flash), 272 Kbytes SRAM (80 Kbytes SRAM2 with ECC) - enables atomic firmware updates and safety-critical data retention.
Security	PSA Level 3 & SESIP3 certified; PKA for ECDSA, HASH (SHA-1/2/3), TRNG (NIST SP800-90B), SFI, HDP - provides root-of-trust for secure boot and field firmware upgrades.
Peripherals	2×12-bit ADC (5 Msps), 2×DAC, 2×FDCAN, 6×USART/LPUART, 3×I2C/Fm+, 2×I3C, Octo-SPI, USB FS host/device (crystal-less), UCPD - supports industrial comms, sensor fusion, and USB-C PD applications.
Power & Timing	1.71–3.6 V supply; Sleep/Stop/Standby modes; 64 MHz HSI, 48 MHz HSI48, 32 kHz LSE; 16 timers including 2×LPTIM in Stop mode - ensures sub-μA retention and fast wake-up for battery-backed systems.
Package	UFBGA144 (10 × 10 mm, 0.8 mm pitch) - high I/O density (112 fast 5 V-tolerant GPIOs) with thermal performance suitable for compact industrial PCBs.

Pinout & Package

STM32H523ZCJ6 uses a 144-ball UFBGA package (10 × 10 mm, 0.8 mm pitch), marked "H523ZCJ6" on top. Ball pitch and layout comply with JEDEC MO-277, supporting automated optical inspection and fine-pitch reflow.

Pin/Terminal	Circuit Role	Design Meaning
VDD/VSS	Core power/ground	Dedicated VCORE supply pins (VDD/VSS) support stable 1.26 V core voltage; decoupling via external 100 nF + 10 nF capacitors required per VDD pair.
VCAP	Internal regulator bypass	Connects to 2.2 µF ceramic capacitor to stabilize internal LDO output; failure causes immediate core reset or undefined behavior.
NRST	Active-low reset input	Asynchronous reset with Schmitt trigger; internal pull-up; compatible with open-drain external reset supervisors (e.g., TPS3808).
BOOT0	Boot mode selection	High at power-up selects system memory bootloader; low selects user flash; must be sampled before release of NRST.
PA13/PA14	SWDIO/SWCLK	Dedicated Serial Wire Debug interface - no alternate function remapping; supports authenticated debug access only in unlocked life-cycle states.
PC14/PC15	LSE oscillator inputs	Drive 32.768 kHz crystal with load capacitance 12.5 pF; used for RTC calibration, tamper timestamping, and low-power wakeup timing.

Key Features

Feature	Design Value
TrustZone-aware GTZC	Configurable memory/peripheral firewall with eight SAU regions - enforces strict isolation between secure firmware and non-secure application code.
ART Accelerator	8-Kbyte ICACHE + 4-Kbyte DCACHE - eliminates flash wait states and accelerates external PSRAM/NOR access for real-time GUI or firmware streaming.
Secure Firmware Installation (SFI)	Hardware-verified signature check during boot - prevents unauthorized firmware loading without exposing private keys or decrypted images.
Public Key Accelerator (PKA)	ECDSA P-256 signature verification in <10 ms - enables fast, low-energy attestation for device identity and firmware integrity checks.
Flexible Life Cycle Management	Three-stage state machine (Development → Production → Locked) with irreversible transitions - ensures debug disable and secure boot enforcement in mass deployment.

Applications

Industrial PLC Edge Node

Secure Smart Meter

Use Scenario: Programmable logic controller performing real-time I/O scanning, motion control, and Modbus TCP gateway functions in factory automation cabinets.

IC Role / Device Role / Timing Role: Main application processor executing RTOS-based control tasks, managing dual CAN FD interfaces, and handling encrypted firmware updates over Ethernet.

Use Value: Dual-bank flash enables zero-downtime field updates; TrustZone isolates safety-critical control logic from network-facing communication stacks.

Use Scenario: Electricity meter with tamper detection, time-of-use billing, and remote firmware upgrade via NB-IoT or LTE-M.

IC Role / Device Role / Timing Role: Secure metering SoC hosting metrology firmware, managing AES-128 encryption for data logs, and validating signed firmware patches using PKA.

Use Value: PSA Level 3 certification satisfies utility regulatory requirements; TRNG and SHA-3 ensure cryptographically strong key derivation and log integrity.

USB-C Power Delivery Hub

Low-Power Sensor Aggregator

Use Scenario: Multi-port USB-C hub negotiating power contracts (up to 100 W), managing display alt-mode, and enforcing policy-based port control.

IC Role / Device Role / Timing Role: UCPD controller coordinating with FDCAN and USB FS PHY; handles PD message parsing, policy engine execution, and fault reporting.

Use Value: Integrated UCPD peripheral eliminates external PD controller; hardware-accelerated ECDSA validates vendor-defined PD extensions.

Use Scenario: Battery-powered environmental monitor aggregating temperature, humidity, and CO₂ data, then transmitting via LoRaWAN every 15 minutes.

IC Role / Device Role / Timing Role: Ultra-low-power host MCU sampling sensors via 12-bit ADC, compressing data in SRAM2, and waking USB/LPUART only for transmission bursts.

Use Value: LPTIM timers retain counting in Stop mode; backup SRAM preserves context across deep sleep; 1.71 V min supply extends battery life in cold environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar secure MCU applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32H563VIT6	Higher flash (2 Mbytes), larger SRAM (1 Mbyte), additional crypto accelerators (AES-GCM, ChaCha20), but same UFBGA100 footprint - not pin-compatible with ZCJ6's UFBGA144.	Targeted at complex gateways requiring TLS stack offload and large OTA image storage - exceeds cost/power envelope for edge node use cases.	Select when >1 Mbyte secure firmware storage and GCM-based secure comms are mandatory; requires PCB redesign due to different ball count/pitch.
NXP LPC55S69JBD100	Arm Cortex-M33 @ 150 MHz, 640 Kbytes flash, 320 Kbytes SRAM, no dual-bank RWW, lacks PSA Level 3 certification - uses separate SE05x secure element for crypto.	Suitable for cost-sensitive consumer IoT where full PSA compliance is optional; relies on external SE for root-of-trust.	Choose if budget constraints outweigh need for integrated PSA-certified security; verify external SE integration adds latency to boot/firmware validation.

Compared with STM32H523ZCJ6, the STM32H563VIT6 offers greater memory headroom and advanced crypto but demands mechanical redesign, while the LPC55S69JBD100 reduces BOM cost at the expense of integrated security assurance and deterministic RWW update capability.

Availability

STM32H523ZCJ6 is available at Aetrix Electronics and suitable for industrial PLC edge nodes, secure smart meters, USB-C PD hubs, and low-power sensor aggregators requiring stable component supply throughout product lifecycles.

Supply support for STM32H523ZCJ6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STM32H5 series is ST's flagship secure MCU line built on the Arm Cortex-M33 core, targeting applications demanding PSA Level 3 certification, hardware-enforced isolation, and robust field-upgrade capabilities in harsh environments.

FAQ

What is the maximum operating frequency and associated DMIPS rating?

The STM32H523ZCJ6 achieves a maximum CPU frequency of 250 MHz, delivering 375 DMIPS (Dhrystone 2.1) and 1023 CoreMark®. This performance is sustained under full TrustZone and ECC-enabled conditions, with zero-wait-state execution enabled by the 8-Kbyte ART instruction cache.

Does this MCU support true dual-bank read-while-write flash operation?

Yes - the 512 Kbytes of embedded flash is organized into two independently erasable banks, allowing simultaneous code execution from one bank while programming or erasing the other. Each bank supports up to 100,000 write/erase cycles for data storage, validated per ST's DS14540 Rev 3 specification.

How is TrustZone security enforced at the hardware level?

TrustZone is implemented via the Global TrustZone Controller (GTZC), which configures SAU regions to define secure/non-secure memory boundaries and enforces access rights on peripherals. All critical resources - flash, SRAM, RCC, GPIOs - are tagged and gated by GTZC, preventing unauthorized access even during exception handling.

What packaging and thermal specifications apply to the ZCJ6 variant?

The STM32H523ZCJ6 uses a 144-ball UFBGA package (10 × 10 mm, 0.8 mm pitch, JEDEC MO-277 compliant). Its θ_JA is 27.5 °C/W (4-layer board), and maximum junction temperature is 105 °C. Recommended PCB layout includes thermal vias under the exposed die pad and 1 oz copper planes for heat dissipation.

STM32H523ZCJ6 Specifications

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Manufacturer:: STMicroelectronics

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Product Status:: Active

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STM32H523ZCJ6 FAQ

1.How can I place an order for STM32H523ZCJ6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32H523ZCJ6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STM32H523ZCJ6 reliable?

The price and inventory of STM32H523ZCJ6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32H523ZCJ6 is usually 5 days.

3.What payment methods are accepted for STM32H523ZCJ6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32H523ZCJ6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32H523ZCJ6?

STM32H523ZCJ6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32H523ZCJ6 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STM32H523ZCJ6?

For technical support, including STM32H523ZCJ6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32H523ZCJ6 requirements.

6.How does Aetrix verify that STM32H523ZCJ6 is sourced from the original manufacturer or authorized distributors?

All STM32H523ZCJ6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32H523ZCJ6 meets industry standards.

7.What is the process for return or replacement of STM32H523ZCJ6?

All STM32H523ZCJ6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32H523ZCJ6, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STM32H523ZCJ6 part is unused and in its original packaging.

Return procedure for STM32H523ZCJ6:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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