STM32G431CBU3 - 170MHz Cortex-M4F MCU | STMicroelectronics
Référence : STM32G431CBU3 ✓ ActifSTM32G431CBU3 Présentation
A microcontroller is a semiconductor that integrates a CPU core, program memory, data memory, and peripherals such as timers, communication interfaces, and analog-to-digital converters into one device. The STM32G431 belongs to the STM32G4 product family, where the Cortex-M4F core, memory resources, and peripheral mix support real-time embedded control. The FPU adds hardware-assisted floating-point calculation, while the 170 MHz operating rate provides processing headroom for control algorithms and supervisory logic.
Verified specifications include a 32-bit ARM Cortex-M4F core, operation up to 170 MHz, 128 KB organized as 128K x 8 of Flash, 32 KB of SRAM, and up to 213 DMIPS. The device is supplied in a 48-pin UFQFPN package with an exposed thermal pad, making it suitable for compact control boards where package area and heat dissipation both matter.
The STM32G4 architecture combines real-time processing with a broad selection of embedded peripherals. Its 213 DMIPS figure provides a useful performance indicator for comparing the core with slower Cortex-M devices. Because the MCU includes 128 KB of Flash, firmware must be sized with attention to boot code, application logic, and update data, while the 32 KB SRAM constrains simultaneous buffer allocation.
Typical use cases include industrial automation modules, compact motor and actuator controllers, digital power-conversion control, sensor acquisition systems, and connected equipment. The 7 x 7 mm UFQFPN package supports dense boards, but the exposed pad requires careful thermal design and PCB layout to dissipate heat effectively.
Designers should use the manufacturer pin definition and datasheet before assigning every package terminal, because the supplied search data does not provide a complete terminal-by-terminal map. Input and output capacitors, grounding, and exposed-pad thermal-via placement should follow the manufacturer reference layout and application guidance.
This page consolidates verified distributor specifications, family-level drop-in candidates, pricing availability, pin-data limitations, and practical selection guidance. It distinguishes confirmed parameters from unverified details so engineers can build an accurate design plan before committing to a PCB layout or production order.
Alternatives de remplacement direct pour STM32G431CBU3 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec STM32G431CBU3 (même facteur de forme et même empreinte) — différant par Package, SRAM.
STM32G431CBU6
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Voir la fiche technique →STM32G431CBU3 Valeurs maximales et caractéristiques électriques
| Product Type | 32-bit ARM Cortex-M4F microcontroller |
| Fréquence d'horloge maximale | 170 MHz |
| Core Processor | ARM Cortex-M4F |
| Architecture | 32-bit |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Performance | Up to 213 DMIPS |
| Floating-Point Unit | Integrated Cortex-M4F FPU |
| Tension d'alimentation | 3.3 V |
| Boîtier | 48-UFQFPN (7 x 7 mm) |
| Nombre de broches | 48 pins |
| Type de montage | Surface Mount |
Guide de configuration des broches du STM32G431CBU3 48-ufqfpn (7 x 7 mm)
Configuration des broches du STM32G431CBU3 (boîtier 48-ufqfpn (7 x 7 mm)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour STM32G431CBU3.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
STM32G431CBU3 convient pour 6 applications: Industrial Automation Control, Digital Power Conversion Control, Sensor Acquisition and Monitoring, Compact Motor and Actuator Control, Connected Embedded Equipment, Portable and Battery-Powered Devices.
Industrial Automation Control
The STM32G431CBU3 fits compact industrial automation modules that require deterministic embedded control without the footprint of a larger microcontroller package. Its 170 MHz ARM Cortex-M4F core and up to 213 DMIPS provide processing capacity for supervisory logic, state machines, and control loops, while 128 KB of Flash accommodates application firmware and 32 KB of SRAM supports working buffers. The 48-UFQFPN package measures 7 x 7 mm, supporting dense controller layouts. Before finalizing the design, confirm the exact peripheral assignments, I/O count, timer resources, and temperature grade from the manufacturer datasheet and preserve the exposed-pad thermal-via arrangement.
Recommandé
Digital Power Conversion Control
The STM32G431CBU3 is appropriate for supervisory and digital-control functions in compact power-conversion modules. A 170 MHz Cortex-M4F processor can execute control calculations efficiently, and the integrated FPU supports floating-point arithmetic commonly used in compensator and filtering algorithms. The 128 KB Flash capacity can hold control code, parameter handling, and diagnostics, while 32 KB of SRAM provides space for measurement buffers and state variables. Its 7 x 7 mm UFQFPN format helps reduce board area. Exact PWM, ADC, and comparator capabilities must be verified in the order-code datasheet, and the exposed pad should be tied to ground through a manufacturer-recommended thermal-via pattern.
Recommandé
Sensor Acquisition and Monitoring
The STM32G431CBU3 can serve as the processing hub in a compact sensor-acquisition or condition-monitoring module. Its 170 MHz Cortex-M4F core supports real-time sampling coordination, filtering, diagnostics, and communication tasks, while the 32 KB SRAM accommodates data buffers required between acquisition and processing stages. The 128 KB Flash provides room for firmware, calibration tables, and embedded data structures. The 48-UFQFPN package allows the controller to be placed close to sensors on a dense board. Designers should verify the required ADC resolution, sample rate, timer inputs, serial interfaces, and analog pin multiplexing directly from the manufacturer documentation before assigning acquisition channels.
Recommandé
Compact Motor and Actuator Control
The STM32G431CBU3 can be used in compact motor or actuator controllers where deterministic real-time processing and board area are both important. Its 170 MHz Cortex-M4F core provides computational headroom for position, speed, or load-control loops, while the hardware FPU accelerates floating-point operations. With 128 KB of Flash and 32 KB of SRAM, the device can combine control firmware with parameter storage and transient state data. The 7 x 7 mm UFQFPN package supports dense integration in equipment enclosures. Verify timer outputs, encoder interfaces, PWM resolution, and fault-handling pins for the exact STM32G431CBU3 order code, and follow the recommended exposed-pad layout for reliable thermal performance.
Recommandé
Connected Embedded Equipment
The STM32G431CBU3 suits connected industrial equipment that combines local control with external communication. Its 170 MHz Cortex-M4F core can handle protocol processing and application tasks, while 128 KB of Flash stores firmware and 32 KB of SRAM supports message buffers. The 48-UFQFPN package reduces the footprint required beside power conversion, sensing, and communications circuitry. The verified excerpts do not enumerate the device's communication peripherals, so interface selection must be based on the manufacturer pinout and reference manual rather than assumption. Preserve clean supply routing, provide adequate decoupling, and use the exposed pad as both a thermal and low-inductance ground connection.
Recommandé
Portable and Battery-Powered Devices
The STM32G431CBU3 can be evaluated for portable instruments and battery-powered modules that need more processing capability than a basic low-power MCU while retaining a compact package. The 170 MHz Cortex-M4F core and up to 213 DMIPS allow responsive control and signal processing, while 128 KB of Flash and 32 KB of SRAM define the usable firmware and working-memory budget. Its 7 x 7 mm UFQFPN format helps reduce board area in wearable-adjacent or handheld industrial equipment. The supplied data does not include active-current, sleep-current, or detailed low-power specifications, so battery-life conclusions require the manufacturer electrical data. Thermal performance still depends on correct exposed-pad layout and copper connection.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour STM32G431CBU3 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | STM32G431CBU6 |
|---|---|---|
| Package | 48-UFQFPN (7 x 7 mm) | 48-UFQFPN (7 x 7 mm) |
| Brand | STMicroelectronics | STMicroelectronics |
| Core Processor | ARM Cortex-M4F | ARM Cortex-M4F |
| Maximum Clock Frequency | 170 MHz | 170 MHz |
| Flash Memory | 128 KB | 128 KB |
| SRAM | 32 KB | 32 KB |
| Architecture | 32-bit | 32-bit |
| Ordering-Grade Suffix | CBU3 | CBU6 |
Principaux différenciateurs
- High-performance Cortex-M4F processing in a compact 7 x 7 mm package (vs STM32G431CBU6)
- Integrated floating-point capability with 128 KB of Flash (vs STM32G431CBU6)
- Documented 48-UFQFPN package for space-constrained control designs (vs STM32F042G6U6TR)
Notes de conception
Treat the exposed pad as both a thermal path and a low-inductance ground connection. Place the STM32G431CBU3 on the manufacturer-recommended UFQFPN land pattern, connect the exposed pad to the ground plane, and use multiple thermal vias beneath the pad. Do not copy a generic 48-pin QFN layout without checking the exact STMicroelectronics drawing. Calculate junction temperature from actual dissipation and the package-specific thermal resistance in the datasheet; the verified search data does not provide theta-JA or maximum power ratings.
Allocate all 128 KB of Flash and 32 KB of SRAM during firmware planning rather than treating the memory figures as entirely available. Include bootloader overhead, fault handlers, communication buffers, update metadata, and stack requirements in the estimate. The 7 x 7 mm package supports dense placement, but routing priority should remain on the power rails, ground return path, and any timing-sensitive pins identified in the exact pin-definition table.
Use the manufacturer reference layout for decoupling and exposed-pad vias, placing input and output capacitors close to their associated supply pins. Maintain short, wide connections for VDDA and VDD-related paths if those rails are separated, and provide a continuous ground reference beneath the device. Because the verified excerpts do not identify every power pin, verify supply-pin numbers and alternate-function assignments in the datasheet before routing rather than inferring them from the package drawing.
Do not assume that any 48-pin UFQFPN Cortex-M MCU is a drop-in replacement. A matching package count does not establish matching pinout, voltage, peripheral mapping, firmware support, or thermal limits. The only supplied same-package candidate is STM32G431CBU6, whose core, Flash, SRAM, and frequency match the target; its suffix-defined grade must still be confirmed. Also avoid interpreting the zero-value tier prices as actual commercial pricing, because no numeric distributor price was verified.
Informations de conformité
The supplied search results include comparison pages that mention RoHS and REACH fields, but they do not provide the actual status values. Compliance must be confirmed from the current STMicroelectronics product documentation.