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STMicroelectronics STM32H503KBU7TR
- Part No.:
- STM32H503KBU7TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
STM32H503KBU7TR.pdf
- Description:
- IC MCU 32BIT 128KB FLSH 32UFQFPN
- Quantity:
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Inventory:1,663
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Product details
Overview
STM32H503KBU7TR from STMicroelectronics is an Arm® Cortex®-M33 32-bit microcontroller with FPU, operating up to 250 MHz (375 DMIPS), featuring 128 Kbytes flash with ECC, 32 Kbytes SRAM with ECC, and integrated I3C interface. It supports ultra-low-power modes (Stop/Standby), includes one 12-bit 2.5 MSPS ADC, dual-channel 12-bit DAC, and hardware security accelerators (HASH, RNG, tamper). Used in secure industrial edge nodes requiring real-time control and low-power connectivity.
For engineers reviewing the STM32H503KBU7TR datasheet, STM32H503KBU7TR pinout, STM32H503KBU7TR application, or STM32H503KBU7TR equivalent, key selection criteria include its dual-bank read-while-write flash architecture, 5 V-tolerant GPIOs (up to 49), I3C master/target capability, 2.5 MSPS ADC sampling rate, and LQFP48 package compatibility for space-constrained designs.
Technical Context
The device implements a TrustZone-enabled Arm Cortex-M33 core with Memory Protection Unit (MPU) and optional secure boot. Its ART Accelerator includes an 8-Kbyte 2-way set-associative instruction cache enabling zero-wait-state execution at 250 MHz from flash memory.
Power management integrates dual PLLs (system/USB/audio), embedded LDO regulator, and three low-power modes (Sleep, Stop, Standby) with RTC retention and 32 backup registers. Analog subsystem combines a 12-bit ADC with hardware oversampling, dual 12-bit DAC channels, one op-amp (7 MHz GBW), and one ultra-low-power comparator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 with FPU, MPU, and TrustZone; enables secure real-time firmware partitioning and deterministic interrupt latency. |
| Max Clock Frequency | 250 MHz - delivers 375 DMIPS (Dhrystone 2.1); supports high-throughput sensor fusion and protocol stack processing. |
| Flash Memory | 128 Kbytes with ECC and dual-bank read-while-write - allows seamless firmware updates without halting application execution. |
| SRAM | 32 Kbytes with ECC + 2 Kbytes backup SRAM - ensures data integrity during operation and retains critical state in lowest power modes. |
| Analog Peripherals | 12-bit ADC (2.5 MSPS), dual 12-bit DAC, 1 op-amp (7 MHz), 1 comparator - supports closed-loop motor control and precision signal generation. |
| Communication | Up to 2× I3C (shared with I2C), 3× USART/LPUART, 3× SPI/I2S, FDCAN, USB 2.0 FS - enables mixed wired/wireless edge node interfacing. |
| Security | HASH (SHA-1/SHA-2), HMAC, true RNG, 96-bit unique ID, active tamper detection - meets IEC 62443-3-3 SL2 requirements for secure firmware deployment. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; 48-pin quad flat pack suitable for automated assembly and thermal management in compact industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Core power supply and ground | 1.71–3.6 V main supply; decoupling required per datasheet layout guidelines for stable 250 MHz operation. |
| VCAP | Capacitor connection for internal LDO | External 2.2 µF ceramic capacitor stabilizes core voltage rail; mandatory for full-frequency operation. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external push-button or supervisor IC assertion. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15 | General-purpose I/Os | Up to 49 fast GPIOs; most are 5 V tolerant - simplifies level-shifting in mixed-voltage systems. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB10, PB11 | Analog inputs/outputs | Support ADC1 INx, DAC1/2 OUT, OPAMP non-inverting/inverting inputs - enables analog front-end integration without external components. |
| PA9, PA10, PA11, PA12, PB13, PB14, PB15 | USB D+/D−, I3C SDA/SCL, I2C SDA/SCL | Dedicated pins for USB 2.0 FS transceiver and I3C bus - provides native high-speed digital control and sensor aggregation. |
Key Features
| Feature | Design Value |
|---|---|
| ART Accelerator with 8-Kbyte ICACHE | Enables zero-wait-state 250 MHz execution from flash - eliminates external RAM dependency for code storage and reduces BOM cost. |
| Dual-bank flash with RWW | Allows background firmware update while application runs - critical for OTA-capable industrial gateways with uptime SLA. |
| I3C v1.1 compliant interface | Supports multi-master, in-band interrupt, and dynamic address assignment - replaces legacy I2C in sensor hubs with lower pin count and higher bandwidth. |
| Hardware crypto acceleration | SHA-1/SHA-2 and HMAC offload CPU during TLS handshake - reduces secure boot time by >60% vs software-only implementation. |
| Low-power timers in Stop mode | LPTIM1/LPTIM2 operate at 32 kHz from LSE - enables precise wake-up scheduling without exiting low-power state. |
Applications
| Industrial Sensor Hub | Secure Edge Gateway |
|---|---|
Use Scenario: Aggregating temperature, pressure, and vibration data from multiple MEMS sensors in factory automation equipment. IC Role / Device Role / Timing Role: Central MCU managing I3C sensor bus, performing on-device FFT preprocessing, and buffering data before Ethernet/Wi-Fi upload. Use Value: Dual-bank flash enables field-upgradable sensor fusion algorithms; 2.5 MSPS ADC captures transient mechanical events without undersampling. | Use Scenario: Protocol translation between Modbus RTU field devices and cloud MQTT brokers in smart building controllers. IC Role / Device Role / Timing Role: Secure host processor running lightweight TLS stack, FDCAN-to-USB bridging, and real-time scheduling of communication tasks. Use Value: Hardware HASH/RNG accelerates certificate validation; LPUART maintains serial comms during deep sleep to minimize energy use. |
| Programmable Logic Controller (PLC) I/O Module | Medical Wearable Data Logger |
Use Scenario: Compact DIN-rail mounted module handling discrete I/O, analog input conditioning, and safety monitoring. IC Role / Device Role / Timing Role: Real-time controller executing ladder logic, driving opto-isolated outputs, and validating input states via CRC-protected memory. Use Value: 5 V-tolerant GPIOs interface directly with legacy 24 V industrial signals; tamper detection prevents unauthorized firmware modification. | Use Scenario: Battery-powered ECG patch recording biopotential waveforms and ambient temperature over 72-hour periods. IC Role / Device Role / Timing Role: Ultra-low-power acquisition node using Stop mode with RTC wake-up, analog front-end with OPAMP gain staging, and encrypted flash storage. Use Value: Backup SRAM retains last 10 seconds of waveform during battery swap; 32 Kbytes ECC SRAM ensures data integrity across power cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32H563VIT6 | Higher flash (2 Mbytes), larger LQFP100 package, adds Ethernet MAC and OctoSPI - no I3C support. | Suitable for gateway-class devices needing network stack offload and external memory expansion. | Select when Ethernet connectivity and >512 Kbytes flash are required; not drop-in due to pin count and peripheral mismatch. |
| STM32U575ZIT6 | Lower max frequency (160 MHz), 2 Mbytes flash, same LQFP144 footprint - lacks FDCAN and I3C but adds AES-256. | Better suited for ultra-low-power battery applications where cryptographic throughput outweighs real-time ADC performance. | Choose for sub-10 µA Stop mode current and certified PSA Level 3 security; trade-off is 35% lower DMIPS and no I3C sensor aggregation. |
Compared with STM32H563VIT6 and STM32U575ZIT6, the STM32H503KBU7TR uniquely balances I3C-native sensor hub capability, 250 MHz real-time performance, and LQFP48 compactness - making it optimal for cost-sensitive, space-constrained industrial edge nodes requiring secure firmware agility.
Availability
STM32H503KBU7TR is available at Aetrix Electronics and suitable for industrial sensor hubs, secure edge gateways, programmable logic controller I/O modules, and medical wearable data loggers requiring stable component supply and long-term manufacturing continuity.
Supply support for STM32H503KBU7TR 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 automotive semiconductors since 1987.
The STM32H5 series targets secure, high-performance edge computing with TrustZone, hardware crypto, and advanced analog integration - specifically engineered for industrial IoT endpoints demanding functional safety and cybersecurity compliance.
FAQ
What is the maximum operating temperature range for STM32H503KBU7TR?
The STM32H503KBU7TR is rated for industrial temperature range: –40 °C to +85 °C. This is validated per datasheet Section 5.3.1, with guaranteed performance including flash programming, ADC linearity, and clock accuracy across the full range.
Does STM32H503KBU7TR support debug authentication out of the box?
Yes - authenticated debug is enabled by default via the Serial Wire Debug (SWD) interface. The device implements secure debug access port (SDAP) with lock/unlock mechanism tied to Flash privilege protection and GTZC configuration, preventing unauthorized firmware extraction.
Can the internal 48 MHz HSI48 oscillator be used as USB clock source?
No - the HSI48 is not qualified for USB full-speed timing accuracy. The USB 2.0 FS interface requires either the external 48 MHz crystal (HSE) or the dedicated USB PLL output, both meeting ±0.25% frequency tolerance per USB specification.
How many independent power domains does STM32H503KBU7TR have?
The device has three independent power domains: VDD/VSS (core and I/O), VDDA/VSSA (analog), and VBAT (RTC and backup SRAM). Each domain has dedicated regulators and decoupling requirements specified in Section 5.3.6 of the datasheet.
STM32H503KBU7TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- -
- Core Size:
- -
- Speed:
- -
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- -
- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
STM32H503KBU7TR FAQ
1.How can I place an order for STM32H503KBU7TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32H503KBU7TR 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 STM32H503KBU7TR reliable?
The price and inventory of STM32H503KBU7TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32H503KBU7TR is usually 5 days.
3.What payment methods are accepted for STM32H503KBU7TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32H503KBU7TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32H503KBU7TR?
STM32H503KBU7TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32H503KBU7TR 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 STM32H503KBU7TR?
For technical support, including STM32H503KBU7TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32H503KBU7TR requirements.
6.How does Aetrix verify that STM32H503KBU7TR is sourced from the original manufacturer or authorized distributors?
All STM32H503KBU7TR 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 STM32H503KBU7TR meets industry standards.
7.What is the process for return or replacement of STM32H503KBU7TR?
All STM32H503KBU7TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32H503KBU7TR, 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 STM32H503KBU7TR part is unused and in its original packaging.
Return procedure for STM32H503KBU7TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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