STM32G431KBU3 - 170MHz Cortex-M4F MCU | STMicroelectronics
部品番号: STM32G431KBU3 ✓ 生産中STM32G431KBU3 概要
A microcontroller is a programmable semiconductor that integrates a processor core, memory, peripherals, and interface blocks on one device. The STM32G431KBU3 belongs to the STM32G4 series, whose Cortex-M4F architecture combines real-time control capability with digital signal processing. Its hierarchy extends from an Arm Cortex-M4F core to a 32-bit embedded microcontroller and then to a general-purpose semiconductor platform.
The verified specifications identify a maximum operating frequency of 170 MHz, 128 KB of Flash, 32 KB of SRAM, and performance of up to 213 DMIPS. The integrated floating-point unit accelerates control calculations and digital signal processing. A 32-pin surface-mount package also supports space-constrained products requiring mixed analog, communication, and real-time control functions.
The STM32G4 architecture is designed for applications where control responsiveness and peripheral integration matter. Its Cortex-M4F core can execute floating-point instructions without software emulation, while the on-chip SRAM provides working memory for control loops and communication stacks. The 5 x 5 mm UFQFPN package reduces board area but requires careful thermal, pad, and assembly-layout planning.
Typical uses include digital power conversion, motor-control modules, industrial sensor controllers, condition-monitoring equipment, compact industrial automation nodes, and embedded measurement instruments. The 170 MHz processing rate is especially useful when combining a fast control loop with communications or diagnostic routines in one device.
When designing around the STM32G431KBU3, confirm the exact pin functions, exposed-pad connection, decoupling requirements, clock configuration, and peripheral routing against the manufacturer datasheet. Do not infer pin compatibility from package dimensions alone, especially when comparing different STM32G431 density or temperature-grade variants.
This product page consolidates verified manufacturer and distributor information, practical application guidance, package considerations, and same-family drop-in candidates. It also distinguishes documented STM32G431 options from unsupported cross-brand substitutions so procurement and engineering reviews can focus on technically defensible choices.
ドロップイン代替品: STM32G431KBU3 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: STM32G431KBU3 （同一形状・フットプリント） — 相違点: Flash Memory, Mounting Type, Package, Product Type.
STM32G431KBT6
✅ ドロップイン ⚠️ 仕様未検証価格はお問い合わせください
データシートを見る →STM32G431KBU6
✅ ドロップイン ⚠️ 仕様未検証価格はお問い合わせください
データシートを見る →STM32G431KBT3
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
STM32G431KBU3 最大定格＆電気的特性
| Product Type | 32-bit ARM Cortex-M4F microcontroller |
| Maximum CPU Frequency | 170 MHz |
| Core Architecture | Arm Cortex-M4F with floating-point unit |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Peak Performance | 213 DMIPS |
| 電源電圧 | 3.3 V |
| ADC Resolution | 12-bit |
| Package Type | 32-pin UFQFPN |
| Package Dimensions | 5 x 5 mm |
| 実装タイプ | Surface mount |
| Architecture | 32-bit RISC |
| Microcontroller Family | STM32G4 |
| Device Variant | STM32G431xB |
| Number of I/O Pins | 32 pins |
STM32G431KBU3 5 x 5 mm ピン配置ガイド
STM32G431KBU3 (5 x 5 mm パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: STM32G431KBU3.
詳細は データシート をご参照ください。
主な用途
STM32G431KBU3 の用途: 6 件s: Digital Power Conversion, Compact Motor-Control Module, Industrial Sensor Controller, Condition-Monitoring Equipment, Industrial Automation Node, Portable Measurement Instrument.
Digital Power Conversion
The STM32G431KBU3 fits compact digital power converters because its 170 MHz Arm Cortex-M4F core provides floating-point execution for control-loop calculations, while 128 KB of Flash accommodates firmware, parameter tables, and fault handling. The 32-pin 5 x 5 mm UFQFPN package limits board area for modules where power density is important. A designer should allocate the required timer outputs, ADC inputs, feedback interfaces, and debug signals according to the exact pin table. The 3.3 V operating description and 32 KB of SRAM help define the power and memory budget, but the final compensation loop, switching frequency, accuracy, and protection scheme must be validated against the chosen topology and external power stage.
おすすめ
Compact Motor-Control Module
The STM32G431KBU3 is suitable for compact motor-control modules that need faster control computation than a basic microcontroller family can provide. Its Cortex-M4F core operates up to 170 MHz and performs up to 213 DMIPS, supporting floating-point current, speed, or position loops in software. The 128 KB of Flash provides room for control code and diagnostics, while 32 KB of SRAM supports working state and communication buffers. In a 32-pin UFQFPN package, the MCU can sit close to a compact gate driver and power stage. Exact PWM channels, encoder interfaces, ADC timing, and break-input availability must be confirmed in the manufacturer pinout before committing the PCB.
おすすめ
Industrial Sensor Controller
The STM32G431KBU3 works well as an industrial sensor controller when the design must combine signal acquisition, local processing, and communications in a small board. Its 170 MHz Cortex-M4F core can process measured data and filtering routines, and the 12-bit ADC mentioned in the verified product information supports embedded measurement functions. The 128 KB of Flash and 32 KB of SRAM provide sufficient resources for sensor-specific firmware and protocol handling. Its 5 x 5 mm UFQFPN package supports dense instrumentation, although industrial temperature ratings, isolation requirements, EMC margins, and analog-reference design still require validation. Engineers should confirm the relevant ADC, communication, and debug pins directly from the official package documentation.
おすすめ
Condition-Monitoring Equipment
The STM32G431KBU3 can serve as the processing core in compact condition-monitoring equipment that combines sensor sampling with local analysis and communication. Its 170 MHz Cortex-M4F core offers enough performance for filtering, feature extraction, and floating-point signal calculations, while 128 KB of Flash accommodates firmware updates and diagnostic data structures. The 32-pin package helps reduce the footprint of portable or fixed industrial monitoring nodes. For vibration or temperature monitoring, designers must verify ADC accuracy, sampling paths, timer availability, and communication mapping against the exact package. External clock stability, sensor excitation, power filtering, and thermal drift should also be addressed so the digital controller does not obscure the accuracy of the measured signal.
おすすめ
Industrial Automation Node
The STM32G431KBU3 is appropriate for a compact industrial automation node that must run control logic, diagnostics, and a communications stack without using a large processor module. Its Cortex-M4F core provides floating-point support at up to 170 MHz, while 128 KB of Flash and 32 KB of SRAM offer more headroom than a minimal microcontroller. The small 5 x 5 mm UFQFPN package is useful in space-constrained PLC interfaces, condition-monitoring gateways, and embedded automation controllers. The appropriate communication peripherals, pin multiplexing, and package-level exposed-pad requirements must be checked before design release. Industrial qualification details, operating-temperature limits, and communication timing margins remain necessary review items because they are not fully documented in the supplied search excerpts.
おすすめ
Portable Measurement Instrument
The STM32G431KBU3 supports portable measurement instruments that need real-time sampling, embedded analysis, and a compact controller footprint. The 170 MHz Cortex-M4F core can execute floating-point compensation and measurement algorithms, and the 128 KB of Flash can hold calibration data, firmware, and a user interface. Its 32-pin 5 x 5 mm UFQFPN package allows integration into handheld or benchtop equipment without requiring a large fine-pitch MCU. For a precision design, verify the ADC inputs, reference-voltage options, timer capture channels, USB or serial interface mapping, and exposed-pad construction. Battery-operated use also requires a detailed power-budget review because the supplied excerpts do not provide quiescent-current, active-current, or analog-performance data.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: STM32G431KBU3 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | STM32G431KBT6 | STM32G431KBU6 | STM32G431KBT3 |
|---|---|---|---|---|
| Package | 32-pin UFQFPN (5 x 5 mm) | 32-pin UFQFPN (5 x 5 mm) | 32-pin UFQFPN (5 x 5 mm) | 32-pin UFQFPN (5 x 5 mm) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| CPU Core | Arm Cortex-M4F | Arm Cortex-M4F | Arm Cortex-M4F | Arm Cortex-M4F |
| Maximum CPU Frequency | 170 MHz | 170 MHz | 170 MHz | 170 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB |
| Verification Basis | Verified manufacturer and distributor data | Same-family LLM candidate; datasheet review required | Same-family LLM candidate; datasheet review required | Same-family LLM candidate; datasheet review required |
主な差別化要因
- Higher-density same-family footprint options retain the principal memory configuration （vs STM32G431KBT6)
- Core performance remains aligned across the same STM32G431K family （vs STM32G431KBU6)
- Identical SRAM capacity supports comparable working-memory allocation （vs STM32G431KBT3)
設計ノート
Treat the 5 x 5 mm UFQFPN as a fine-pitch, exposed-pad assembly design. Follow the manufacturer land pattern, solder-mask and paste recommendations, and place input and output decoupling capacitors close to their associated supply pins. Preserve short, direct current paths and provide adequate ground-plane area. Because the supplied sources do not include the official pin table or footprint drawing, do not derive copper dimensions from a generic 32-pin QFN library without cross-checking the STMicroelectronics package drawing.
The exposed thermal pad is part of the package and must be connected according to the manufacturer layout instruction, normally through a low-impedance thermal and ground via array. Review the maximum junction temperature, package thermal data, and actual switching duty cycle. The verified excerpts do not provide theta_JA, theta_JC, or power dissipation, so no thermal rise can be calculated responsibly from the supplied data; obtain those values from the current datasheet before approving dense power-conversion layouts.
Separate analog, digital, and switching-supply return paths where practical, and place local high-frequency bypass capacitors at the device supply pins rather than routing decoupled power across the board. Use a clean reference for analog measurements and validate startup, brownout, and clock-settling behavior. The verified data confirms a nominal 3.3 V device but does not specify voltage tolerances, quiescent current, or regulator requirements, so those values must be obtained from the manufacturer datasheet before selecting the power tree.
Do not treat equal package dimensions as proof of a drop-in replacement. Compare the official pin tables, exposed-pad layout, power pins, ground pins, reset behavior, oscillator pins, ADC channels, timer outputs, debug interface, and ordering-code temperature grade. Also verify that replacement firmware accounts for device IDs and the STM32G431 variant. The three alternatives listed here are same-family review candidates, while the supplied web search did not establish a qualified cross-brand drop-in equivalent.
コンプライアンス情報
The verified source excerpts do not provide verified regulatory declarations for this exact ordering code. Regulatory status must be confirmed from the current STMicroelectronics product documentation before use in a compliance statement.
