STM32L412K8U6 - 80MHz Cortex-M4 MCU, 64KB | STMicroelectronics
部品番号: STM32L412K8U6 ✓ 生産中STM32L412K8U6 概要
An ultra-low-power microcontroller is a semiconductor that balances processing capability with reduced energy consumption during active operation and low-power modes. The STM32L4 product hierarchy combines an Arm Cortex-M4 core, embedded Flash, SRAM, communication peripherals, and power-management functions. This makes the STM32L412K8U6 suitable for compact systems requiring flexible processing, serial connectivity, and efficient standby behavior without the complexity of a larger application processor.
The principal specifications are an 80 MHz maximum clock frequency, 64 KB of Flash memory, and a 32-pin UFQFPN package measuring 5 x 5 mm. The Arm Cortex-M4 core includes an FPU for efficient single-precision floating-point operations, while USB support expands the available peripheral options. The 64 KB Flash configuration provides a practical balance between firmware capacity and package density for embedded products, control systems, and connected accessories.
Compared with larger STM32 members, the K8U6 option offers a compact 32-pin footprint while retaining the performance-oriented Cortex-M4 architecture and 80 MHz operating frequency. The product-family naming structure also provides related density options that can be evaluated when more Flash memory is required, although changing density can affect pin availability, firmware organization, and board-level requirements. Software compatibility must therefore be checked against the exact device configuration.
Typical uses include USB-connected industrial controls, compact sensor interfaces, low-power data-acquisition modules, medical and laboratory instruments, and small automation nodes. In these applications, the microcontroller can handle peripheral control, communications, and real-time processing while keeping the board area constrained by the 5 x 5 mm package.
PCB implementation should preserve the exposed-pad thermal and electrical requirements of the UFQFPN package. Follow the manufacturer land pattern, provide the specified decoupling network, and review pin multiplexing and peripheral assignments for the selected board revision before releasing firmware.
This product page combines the verified STM32L412K8U6 specifications, same-package family options, comparison parameters, and practical implementation guidance to support component selection, schematic review, sourcing, and PCB planning.
ドロップイン代替品: STM32L412K8U6 — 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: STM32L412K8U6 （同一形状・フットプリント） — 相違点: Flash Memory, Package, Processor Core, Product Type.
STM32L412KBU6
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
STM32L412KBT6
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
STM32L412K8T6
✅ 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 →STM32L412K8U6TR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
STM32L412KBU6TR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
STM32L412K8U6 最大定格＆電気的特性
| Product Type | Ultra-low-power 32-bit microcontroller |
| Processor Core | Arm Cortex-M4 with FPU |
| Instruction Set | 32-bit RISC |
| Maximum CPU Frequency | 80 MHz |
| Flash Memory | 64 KB |
| Flash Organization | 64K x 8 |
| Floating-Point Unit | Included |
| USB Interface | Supported |
| パッケージ | 32-pin UFQFPN, 5 x 5 mm |
| ピン数 | 32 pins |
| 実装タイプ | Surface mount |
| Core Architecture | Arm Cortex-M4 |
| Series | STM32L4 |
| Product Family | STM32L412 |
| RoHS ステータス | Compliant |
STM32L412K8U6 32-pin ufqfpn, 5 x 5 mm ピン配置ガイド
STM32L412K8U6 (32-pin ufqfpn, 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: STM32L412K8U6.
詳細は データシート をご参照ください。
主な用途
STM32L412K8U6 の用途: 6 件s: USB Connected Industrial Controls, Low-Power Sensor Interface, Portable Medical Instrument, Data Acquisition Module, USB Security and Access Module, Small Automation Node.
USB Connected Industrial Controls
The STM32L412K8U6 fits compact industrial-control modules that need USB connectivity without a separate interface controller. Its Arm Cortex-M4 core operates at up to 80 MHz for control-loop execution and peripheral management, while the FPU supports single-precision calculations without requiring a larger processor package. USB can be used for configuration transfer, status reporting, firmware updates, or data acquisition. The 64 KB Flash provides useful code density for protocol stacks and control firmware, and the 32-pin 5 x 5 mm UFQFPN package keeps the PCB compact. Because the MCU is intended for ultra-low-power operation, designers can also use its low-power modes between active measurement intervals.
おすすめ
Low-Power Sensor Interface
The STM32L412K8U6 is appropriate for sensor gateways that must collect measurements, apply filtering, and present data through a serial or USB interface. The 80 MHz Cortex-M4 core provides headroom for digital filtering and control algorithms, while its FPU accelerates common sensor-processing operations. A 64 KB Flash footprint is suitable for moderate application code and boot logic. The 32-pin UFQFPN package allows the converter, regulator, and sensing circuitry to be placed on a compact board. For battery-powered instruments, run-time and sleep-mode behavior should be evaluated under the intended voltage and peripheral conditions because system load and sensor duty cycle determine the final energy budget.
おすすめ
Portable Medical Instrument
The STM32L412K8U6 can serve as the control processor in compact medical and laboratory instruments where an Arm Cortex-M4 core, USB interface, and small package are useful. At up to 80 MHz, it can coordinate sensor acquisition, digital filtering, user commands, and data transfer while retaining an efficient footprint. The FPU is beneficial for calibration and signal-conditioning calculations involving single-precision arithmetic. Its ultra-low-power positioning also suits portable products that spend substantial time between measurements. Medical designs still require application-specific risk controls, calibration, electrical isolation where applicable, and compliance review; the MCU classification does not itself establish medical-device certification.
おすすめ
Data Acquisition Module
The STM32L412K8U6 is well matched to compact data-acquisition modules that combine sensor conditioning, digital processing, and a host connection. Its 80 MHz Cortex-M4 core can execute sampling control and filtering, and the FPU handles arithmetic-heavy transformation stages more efficiently than a basic microcontroller core. USB support provides a direct path for transferring captured data to a computer or configuration terminal, reducing the need for an external interface IC. The 32-pin UFQFPN package preserves board area for analog channels and power management, although 64 KB of Flash may constrain very large buffering or sophisticated GUI firmware and should be checked against the compiled image.
おすすめ
USB Security and Access Module
The STM32L412K8U6 can be used in compact security, access-control, or credential-handling modules that require secure USB connectivity and a capable control core. The 80 MHz Arm Cortex-M4 processor supports protocol processing, state management, and peripheral coordination, while USB provides a standard host interface for configuration or audit functions. The 32-pin UFQFPN package is useful in space-constrained enclosures and allows local flash, cryptography support, and status interfaces to be integrated. Designers should define key-storage, tamper-response, and update mechanisms at the system level and verify that the selected STM32L412 configuration provides every required security peripheral before schematic approval.
おすすめ
Small Automation Node
The STM32L412K8U6 suits small automation nodes that combine local sensing, actuator control, and communications. Its 80 MHz Cortex-M4 core can execute deterministic control tasks and moderate protocol processing, while the FPU supports filter and motion-related calculations. The 64 KB Flash configuration is appropriate for streamlined firmware, and the compact 32-pin 5 x 5 mm UFQFPN package leaves room for power conversion and field interfaces. USB may serve as a commissioning or configuration link rather than the primary field network. For production deployment, validate startup timing, brownout behavior, peripheral pin assignments, and firmware fit for the complete actuator and communications workload.
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: STM32L412K8U6 — 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 | STM32L412KBU6 | STM32L412KBT6 | STM32L412K8T6 | STM32L412K8U6TR | STM32L412KBU6TR |
|---|---|---|---|---|---|---|
| Package | 32-pin UFQFPN (5x5) | 32-pin UFQFPN (5x5) | 32-pin UFQFPN (5x5) | 32-pin UFQFPN (5x5) | 32-pin UFQFPN (5x5) | 32-pin UFQFPN (5x5) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Processor Core | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU |
| Maximum CPU Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 64 KB | 128 KB | 128 KB | 64 KB | 64 KB | 128 KB |
| Flash Organization | 64K x 8 | 128K x 8 | 128K x 8 | 64K x 8 | 64K x 8 | 128K x 8 |
| USB Support | Supported | Supported | Supported | Supported | Supported | Supported |
| Order-Code Difference | K8U6 ordering code | K8 with 128 KB Flash density designation | K8 with 128 KB Flash and T6 order code | T6 order-code suffix | U6 order code with reel-oriented suffix | KB density, U6 order code, and reel-oriented suffix |
主な差別化要因
- Balances 80 MHz processing with a compact 32-pin package （vs STM32L412KBU6)
- USB integration reduces external interface-component count （vs STM32F051K4U6)
- FPU-enabled Cortex-M4 performance at 80 MHz （vs STM32F031K6U6)
設計ノート
Use the STMicroelectronics UFQFPN land pattern and exposed-pad recommendation rather than treating the STM32L412K8U6 as a conventional leaded package. Place the prescribed input and bypass capacitors close to their corresponding power pins, route high-current and sensitive signals away from the switching node of any adjacent regulator, and maintain the manufacturer pad and solder-mask geometry. Review the exposed pad for both electrical connection and heat spreading.
Design the supply rail for the exact operating voltage and peripheral load listed in the STM32L412xx electrical characteristics. Check startup current, brownout behavior, and regulator stability across the full input range rather than relying only on the nominal 3.3 V condition. Because the MCU is designed for low-power operation, separately quantify active current, idle current, and wake-up charge so the power budget reflects the complete product duty cycle.
Do not treat a same-family STM32L412 order code as an unconditional drop-in substitute. Confirm that every exposed ball has the required supply, ground, reset, boot, and debug connection; compare SRAM, peripheral assignments, USB pins, clock limits, Flash organization, and temperature grade; and validate the linker and boot configuration against the exact replacement device. Firmware compiled for a lower Flash density may require a target update and vector-table review.
Keep the 80 MHz processor and USB interface away from noisy analog or switching-power paths, especially when the device performs precision measurement or low-noise signal generation. Provide short return paths for ground and follow the manufacturer guidance for analog and digital supply partitioning. USB routing also requires controlled impedance, suitable return-path continuity, and placement of any prescribed support components according to the selected device reference design.
コンプライアンス情報
The Mouser product record lists the STM32L412K8U6 as RoHS compliant. No explicit REACH, halogen-free, conflict-minerals, or automotive-qualification statement was identified.