My Inquiry
My Account
STMicroelectronics STM32H503CBT6
- Part No.:
- STM32H503CBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32H503CBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,831
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM32H503CBT6 from STMicroelectronics is an Arm® Cortex®-M33 32-bit microcontroller with FPU, operating up to 250 MHz (375 DMIPS), featuring 128 Kbytes flash memory with ECC, 32 Kbytes SRAM with ECC, and integrated I3C interface. It delivers secure, low-power embedded control for industrial sensors, smart meters, and IoT edge nodes requiring real-time processing, cryptographic acceleration (HASH, RNG), and analog signal conditioning (12-bit ADC, dual-channel DAC, op-amp).
For engineers reviewing the STM32H503CBT6 datasheet, STM32H503CBT6 pinout, STM32H503CBT6 application, or STM32H503CBT6 equivalent, key selection criteria include its dual-bank read-while-write flash architecture, 2.5 MSPS ADC sampling rate, LQFP48 package compatibility, and support for authenticated debug via SWD/JTAG in production environments.
Technical Context
The STM32H503CBT6 implements a TrustZone-enabled Arm Cortex-M33 core with Memory Protection Unit (MPU) and hardware-based security features including HASH (SHA-1/SHA-2), HMAC, and a true random number generator. Its ART Accelerator includes an 8-Kbyte instruction cache enabling zero-wait-state execution at 250 MHz from flash memory.
Power management integrates dual PLLs (system, USB/audio/ADC), internal oscillators (64 MHz HSI, 48 MHz HSI48, 4 MHz CSI, 32 kHz LSI), and external clock support (4–50 MHz HSE, 32.768 kHz LSE). Low-power modes include Stop mode with two 16-bit timers active and Standby mode with RTC and 32 backup registers retained via VBAT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 with FPU, MPU, and TrustZone; enables secure firmware partitioning and deterministic real-time execution. |
| Max Clock Frequency | 250 MHz - supports high-throughput data acquisition and control loop execution at ≤4 ns instruction cycle time. |
| Flash Memory | 128 Kbytes with ECC and dual-bank RWW - allows over-the-air firmware updates without halting application code. |
| SRAM | 32 Kbytes with ECC + 2 Kbytes backup SRAM - ensures data integrity during operation and retention in lowest power modes. |
| Analog Peripherals | 12-bit ADC (2.5 MSPS), dual-channel 12-bit DAC, 7 MHz op-amp, ultra-low-power comparator - supports closed-loop sensor signal chain integration. |
| Communication | Up to 2× I3C (shared with I2C), 3× USART/LPUART, 3× SPI/I2S, FDCAN, USB 2.0 FS host/device - enables mixed-protocol industrial connectivity. |
| Security | HASH (SHA-1/SHA-2), HMAC, 96-bit unique ID, active tamper detection - meets IEC 62443-3-3 SL2 requirements for secure boot and runtime attestation. |
| Package | LQFP48 (7 × 7 mm, 0.5 mm pitch) - provides mechanical robustness and thermal performance suitable for reflow-soldered industrial PCBs. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; compliant with ECOPACK2 environmental standards and rated for industrial temperature range (–40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Core power supply and ground | 1.71–3.6 V application supply; decoupling required per datasheet layout guidelines to maintain 250 MHz stability. |
| VCAP | Internal LDO stabilization capacitor connection | Requires external 2.2 µF ceramic capacitor to ensure stable core voltage regulation under dynamic load. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external reset supervisor or push-button recovery. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PF0–PF1 | General-purpose I/Os | Up to 49 fast GPIOs; most are 5 V tolerant and support interrupt generation for wake-up from low-power modes. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB10, PB11, PC0, PC1, PC2, PC3, PC4, PC5 | Analog inputs (ADC/DAC/COMP/OPAMP) | Shared pins for 12-bit ADC (16 channels), dual DAC outputs, comparator inputs, and op-amp non-inverting/inverting terminals. |
| PA9, PA10, PA11, PA12, PB13, PB14, PB15, PC6, PC7, PC10, PC11, PD8, PD9, PD10, PD11, PD12 | Alternate function peripherals | Support I3C/I2C, USART, SPI, FDCAN, USB D+/D−, and timer capture/compare signals with configurable remapping. |
Key Features
| Feature | Design Value |
|---|---|
| ART Accelerator with 8-Kbyte ICACHE | Enables 0-wait-state execution at 250 MHz from flash, eliminating performance penalty of embedded non-volatile memory access. |
| Dual-bank flash with RWW | Allows background firmware update while executing application code from alternate bank - critical for fail-safe OTA deployment. |
| Embedded security engine | HASH accelerator + TRNG + 96-bit UID enables efficient TLS handshake, secure boot verification, and device identity binding. |
| Low-power timer in Stop mode | LPTIM1/LPTIM2 remain active during Stop mode, enabling precise wake-up intervals (e.g., sensor polling every 100 ms) without CPU wake-up overhead. |
| Integrated analog front-end | Single-chip solution combining 2.5 MSPS ADC, dual DAC, op-amp, and comparator eliminates need for external signal conditioning components. |
| I3C interface support | Backward-compatible with I2C while offering higher bandwidth, dynamic addressing, and in-band interrupt - ideal for multi-sensor hub applications. |
Applications
| Industrial Sensor Node | Smart Energy Meter |
|---|---|
Use Scenario: Compact, battery-powered environmental sensor collecting temperature, humidity, and pressure data with local preprocessing. IC Role / Device Role / Timing Role: Main controller executing sensor fusion algorithms, managing low-power scheduling, and securing data before transmission via I3C or LPUART. Use Value: Dual-bank flash enables field firmware updates without service interruption; 2 Kbytes backup SRAM retains calibration coefficients across power cycles. | Use Scenario: DIN-rail mounted electricity meter performing real-time energy calculation, tamper detection, and secure communication with utility backend. IC Role / Device Role / Timing Role: Secure metering SoC handling metrology (via ADC oversampling), cryptographic signing of consumption logs, and FDCAN/USB reporting. Use Value: Active tamper detection triggers immediate memory wipe; HASH engine accelerates SHA-256 signature generation for regulatory compliance (e.g., MID/ANSI C12.22). |
| IoT Edge Gateway | Programmable Logic Controller (PLC) Module |
Use Scenario: Field-deployed gateway aggregating Modbus RTU, BLE, and LoRaWAN sensor data before forwarding to cloud via Ethernet or cellular. IC Role / Device Role / Timing Role: Protocol translation hub using multiple UARTs, SPI, and I3C to interface heterogeneous field devices while maintaining real-time scheduling. Use Value: Three independent DMA controllers offload CPU from data movement; LPUART maintains connectivity during deep sleep to minimize system power. | Use Scenario: Modular PLC base unit controlling motors, valves, and indicators in factory automation with deterministic I/O response. IC Role / Device Role / Timing Role: Real-time motion controller running PID loops at 10 kHz, synchronizing PWM outputs, and monitoring safety-critical inputs via GPIO interrupts. Use Value: 250 MHz Cortex-M33 delivers sub-100 µs control loop latency; 49 fast GPIOs support direct connection to opto-isolated I/O modules. |
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 SRAM (640 Kbytes), additional crypto accelerators (AES-GCM, PKA), 100-pin LQFP package | Suitable for complex HMI, secure bootloader hosting, or multi-protocol gateways requiring extended memory and advanced cryptography | Select when >128 Kbytes flash or hardware PKA is required; not pin-compatible with STM32H503CBT6. |
| STM32G0B1RET6 | Cortex-M0+, 64 MHz max, 512 Kbytes flash, no TrustZone, no I3C, lower peripheral integration (no FDCAN, no USB host) | Cost-sensitive, low-complexity control tasks where security and high-speed analog are not required | Choose for simpler designs needing basic USB device or CAN FD; lacks ECC memory, cryptographic engines, and I3C support. |
Compared with STM32H563VIT6, the STM32H503CBT6 offers optimized cost/power for mid-tier industrial control without sacrificing TrustZone or I3C; versus STM32G0B1RET6, it delivers 3.9× higher DMIPS, full cryptographic acceleration, and integrated analog signal chain - justifying upgrade where real-time security and sensor fusion are essential.
Availability
STM32H503CBT6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, IoT edge gateways, and programmable logic controller modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for STM32H503CBT6 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, specializing in microcontrollers, power management, analog, MEMS, and automotive ICs.
The STM32H5 series targets secure, high-performance industrial and IoT edge applications, combining Arm TrustZone, cryptographic acceleration, and rich analog integration to replace discrete security + MCU + signal-chain solutions.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating of the STM32H503CBT6?
The STM32H503CBT6 operates at up to 250 MHz with a measured performance of 375 DMIPS (Dhrystone 2.1). This rating is achieved with ART Accelerator enabled and instruction cache configured for 2-way set associative operation, ensuring deterministic execution timing for real-time control applications.
Does the STM32H503CBT6 support hardware-based security features beyond software libraries?
Yes - it integrates dedicated hardware blocks including HASH (SHA-1/SHA-2), HMAC, True Random Number Generator (TRNG), 96-bit unique ID, and active tamper detection circuitry. These enable secure boot verification, TLS session key generation, and runtime integrity checks without CPU overhead or software vulnerability exposure.
Which package variant does the STM32H503CBT6 use, and what are its thermal and mechanical characteristics?
The STM32H503CBT6 uses the LQFP48 package (7 × 7 mm body, 0.5 mm lead pitch, ECOPACK2-compliant). It features an exposed thermal pad for enhanced heat dissipation and is rated for industrial temperature range (–40 °C to +85 °C), with θJA = 48 °C/W under standard JEDEC PCB conditions.
Can the STM32H503CBT6 execute code directly from RAM, and what are the implications for real-time performance?
Yes - it supports execution from 32 Kbytes SRAM with ECC, achieving up to 246 CoreMark®/MHz (1023 total) when cache is enabled. Running time-critical ISR code from SRAM eliminates flash access latency and jitter, improving determinism in motor control or audio processing applications where sub-microsecond timing is essential.
STM32H503CBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32H5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M33
- Core Size:
- 32-Bit
- Speed:
- 250MHz
- Connectivity:
- CANbus, FIFO, I2C, IrDA, LINbus, SCI, SDIO, SMBus, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, PDR, POR, PWM, SHA, TRNG, Voltage Detect, WDT
- Number of I/O:
- 35
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 10x12b SAR; D/A 1x12b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32H503CBT6 FAQ
1.How can I place an order for STM32H503CBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32H503CBT6 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 STM32H503CBT6 reliable?
The price and inventory of STM32H503CBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32H503CBT6 is usually 5 days.
3.What payment methods are accepted for STM32H503CBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32H503CBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32H503CBT6?
STM32H503CBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32H503CBT6 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 STM32H503CBT6?
For technical support, including STM32H503CBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32H503CBT6 requirements.
6.How does Aetrix verify that STM32H503CBT6 is sourced from the original manufacturer or authorized distributors?
All STM32H503CBT6 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 STM32H503CBT6 meets industry standards.
7.What is the process for return or replacement of STM32H503CBT6?
All STM32H503CBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32H503CBT6, 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 STM32H503CBT6 part is unused and in its original packaging.
Return procedure for STM32H503CBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32H503CBT6 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
