STM32H503RBT6 - 250MHz Cortex-M33 MCU 128KB Flash | ST
Teilenummer: STM32H503RBT6 ✓ Aktiv| Menge | Stückpreis | Gesamt |
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STM32H503RBT6 Übersicht
A microcontroller (MCU) is a single-chip computer that integrates a processor core, non-volatile program memory, SRAM, and peripherals such as timers, communication interfaces, and analog blocks on one die. Within the semiconductor hierarchy, the STM32H503RBT6 belongs to the STM32H5 high-performance MCU series, which sits inside the broader STM32 family, the Cortex-M microcontroller category, and the general class of embedded processors used in real-time control systems.
Key features include the 250 MHz Cortex-M33 core with a single-precision floating-point unit (FPU), a full set of DSP instructions, and a memory protection unit (MPU) for application security. According to the ST datasheet, the part operates from a 1.8 V, 2.5 V, or 3.3 V supply. The 128 KB on-chip Flash allows embedded firmware to be stored and executed in place, while the 32 KB SRAM supports real-time control loops and communication buffers without external memory.
Architecturally, the Cortex-M33 is an Armv8-M mainline profile core: the FPU accelerates single-precision math for sensor fusion and control algorithms, DSP instructions speed up filtering and signal processing, and the MPU enforces memory partitioning between application code and safety-critical regions. ST positions the STM32H503 line as extending the STM32 high-performance portfolio with enhanced performance and power efficiency, targeting compute-intensive real-time control at entry-level price points.
Typical applications include industrial motor control and digital power conversion (where the 250 MHz core closes fast control loops), consumer and industrial HMI nodes, and embedded systems needing USB, CAN, or multi-UART connectivity with more CPU and memory headroom than entry-level MCUs. The 64-pin LQFP offers a practical count of GPIOs for such designs.
One key design consideration is supply selection: the device supports 1.8 V, 2.5 V, and 3.3 V rails, so confirm the operating voltage range and peripheral-speed derating at the chosen VDD before finalizing the power tree. Decouple each supply pin with 100 nF ceramics per ST hardwareGettingStarted guidance.
This page synthesizes distributor pricing context, drop-in alternatives, design notes, and application guidance not found in a single manufacturer datasheet.
Drop-in-Alternativen für STM32H503RBT6 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
STM32H503RBT7
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
STM32H503RBT6 Grenzwerte & elektrische Eigenschaften
| Core | ARM Cortex-M33, 32-bit |
| Core Clock | 250 MHz |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB |
| FPU | Yes (single-precision) |
| DSP Instructions | Yes |
| MPU | Yes (Memory Protection Unit) |
| Versorgungsspannung | 1.8 V / 2.5 V / 3.3 V |
| Series | STM32H5 (STM32H503) |
| Gehäuse | 64-LQFP (10 x 10 mm) |
| Montageart | Surface Mount |
| Packaging | Tray |
STM32H503RBT6 64-lqfp (10 x 10 mm) Pinbelegungsleitfaden
Pinbelegung für STM32H503RBT6 (64-lqfp (10 x 10 mm)-Gehäuse). Dieser digitale IC umfasst GPIO, Kommunikationsschnittstellen (UART, SPI, I2C) und Versorgungspins. Alternative Pin-Funktionen und Konfigurationsoptionen entnehmen Sie dem Herstellerdatenblatt. Unverzichtbar für Embedded-System-Design und PCB-Layout.
Keine detaillierten Pinbelegungsdaten verfügbar für STM32H503RBT6.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
STM32H503RBT6 ist geeignet für 6 Anwendungs: Industrial Motor Control, Digital Power Conversion, Industrial HMI and Automation Nodes, Embedded IoT and Connectivity Devices, Consumer Appliances, Test and Measurement Instruments.
Industrial Motor Control
The STM32H503RBT6 fits industrial motor control because its 250 MHz Cortex-M33 core, hardware FPU, and DSP instruction set execute field-oriented control (FOC) loops with substantial cycle-count margin. According to the ST datasheet, the core supports all Arm single-precision data-processing instructions plus DSP instructions, accelerating Park/Clarke transforms and PI-loop math. In a typical topology the MCU drives gate-driver inputs from advanced timers while ADCs sample phase currents each PWM cycle; the MPU can partition the control ISR from communication stacks for functional safety. The trade-off versus dedicated motor ASSPs is flexibility: one MCU serves multiple motor topologies with firmware changes only.
Empfohlen
Digital Power Conversion
In digital power supplies and PFC stages, the STM32H503RBT6 closes current- and voltage-mode control loops at the switching frequency using its 250 MHz core, with the FPU handling compensation-network arithmetic in single precision. The 128 KB Flash stores multiple regulation profiles, and the 32 KB SRAM buffers telemetry for host communication. A typical design places the MCU between the sense divider and the PWM gate driver, replacing analog compensators with digital filters whose coefficients can be retuned in the field. Compared with fixed-function controllers, this adds algorithm flexibility at the cost of software validation effort and requires careful ADC timing alignment to the PWM carrier.
Empfohlen
Industrial HMI and Automation Nodes
The STM32H503RBT6 serves as the main controller in industrial HMI panels, sensor hubs, and factory automation nodes where a 250 MHz core is needed for display refresh, protocol stacks, and local decision logic. Its 1.8 V / 2.5 V / 3.3 V supply options simplify interfacing with both legacy 3.3 V and low-voltage peripherals. The 64-pin LQFP provides enough GPIOs for keypads, indicator LEDs, and multiple UART/SPI/I2C buses. ST positions the STM32H503 family as extending the high-performance STM32 portfolio at entry cost, which makes it attractive for cost-sensitive automation nodes that still need deterministic real-time response.
Empfohlen
Embedded IoT and Connectivity Devices
For IoT edge nodes and connected devices, the STM32H503RBT6 offers the compute headroom to run TLS stacks and protocol processing that entry-level Cortex-M0+ parts struggle with, thanks to the 250 MHz Cortex-M33 and hardware divide/FPU support. The MPU enables partitioning of the network stack from application firmware, improving robustness. In a typical design the MCU connects to a Wi-Fi, BLE, or LoRa module over UART/SPI and manages sensors over I2C. The 128 KB Flash constrains large stack-based applications, so code-size optimization with the STM32CubeH5 HAL and linker-level garbage collection is recommended in memory-tight designs.
Empfohlen
Consumer Appliances
Home appliances such as fans, pumps, compressors, and small kitchen devices benefit from the STM32H503RBT6's combination of a 250 MHz real-time core and low-cost 64-LQFP packaging. The DSP-enhanced Cortex-M33 executes sensorless motor algorithms and user-interface logic on one chip, reducing BOM count versus separate control and UI controllers. The device's 1.8-3.3 V operating range supports modern low-voltage peripheral sets, and the 10 x 10 mm LQFP simplifies two-layer PCB designs typical of appliance electronics. Firmware-updatable control profiles stored in the 128 KB Flash let a single hardware platform serve multiple appliance SKUs.
Empfohlen
Test and Measurement Instruments
Handheld meters, sensor conditioners, and bench accessories use the STM32H503RBT6 where a fast 250 MHz core with an FPU performs calibration math, averaging, and digital filtering on sampled data. The single-precision FPU per the ST datasheet supports all Arm single-precision data-processing instructions, enabling float-based measurement pipelines without fixed-point gymnastics. The MCU typically sits between a precision ADC front end (SPI) and a display plus USB or UART link to a host. The MPU assists in protecting calibration constants from accidental overwrites. Designers should budget the 32 KB SRAM carefully when using large DSP buffers or display framebuffers.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für STM32H503RBT6 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | STM32H503RBT7 | STM32H503CBT6 |
|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) - same | 48-LQFP - different footprint |
| Core | ARM Cortex-M33 | ARM Cortex-M33 | ARM Cortex-M33 |
| Core Clock | 250 MHz | 250 MHz | 250 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 32 KB |
| Supply Voltage | 1.8 V / 2.5 V / 3.3 V | 1.8 V / 2.5 V / 3.3 V | 1.8 V / 2.5 V / 3.3 V |
| FPU / DSP / MPU | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes |
Wichtigste Unterscheidungsmerkmale
- 250 MHz Cortex-M33 at entry-level STM32 cost (vs. STM32G4-class MCUs (~170 MHz Cortex-M4))
- Single-precision FPU plus DSP instructions in hardware (vs. STM32G0-class Cortex-M0+ parts (no FPU))
- 64-pin LQFP for maximum GPIO on the STM32H503 family (vs. STM32H503CBT6 (48-pin LQFP))
Designhinweise
The STM32H503RBT6 supports 1.8 V, 2.5 V, and 3.3 V operation. Confirm the general operating conditions table in the ST datasheet for maximum core/peripheral clock derating at your chosen VDD before freezing the power tree. Follow ST hardware development guidance: place one 100 nF ceramic capacitor on each VDD/VSS pair as close to the pins as possible, plus bulk capacitance (4.7 uF to 10 uF) near the regulator output. If using an external regulator, ensure its startup ramp is monotonic to guarantee a clean MCU power-on reset.
The 64-LQFP (10 x 10 mm) footprint needs a good ground return: use a solid ground plane on layer 2 and stitch the LQFP paddle-adjacent VSS pins directly to it with short vias. Keep the crystal/oscillator traces short and guarded by ground. Route fast peripheral buses away from analog sensing lines feeding the ADC, and consider an RC filter plus a separate clean analog supply path if ADC accuracy matters. ST application notes on STM32 hardware development provide reference decoupling layouts for LQFP packages.
Do not assume cross-family portability: code written for STM32F1/GD32F1 parts will not run on the Cortex-M33 based STM32H5 without migration to the STM32CubeH5 HAL and updated clock-tree configuration (250 MHz maximum). Also note the memory ceiling - 128 KB Flash and 32 KB SRAM - so enable compiler size optimization (-Os), verify map-file usage, and reserve margin for bootloader and OTA slots early in the project. Finally, confirm the exact temperature grade of your suffix code (6 vs 7) against the datasheet before qualifying for extended-temperature enclosures.
Compliance-Informationen
Compliance data was not present in the verified web data; consult the official ST product page (st.com/en/microcontrollers-microprocessors/stm32h503rb.html) for current RoHS/REACH declarations.
