STM8L151K3U6 - 16MHz 8KB Low-Power MCU | STMicroelectronics
部品番号: STM8L151K3U6 ✓ 生産中STM8L151K3U6 概要
An ultra-low-power microcontroller is an embedded semiconductor designed to execute control tasks while minimizing energy consumption during active operation, sleep, and standby. The STM8L151K3 belongs to the STM8L EnergyLite hierarchy of 8-bit microcontrollers, combining real-time control with peripheral integration for compact industrial, consumer, and IoT equipment.
The principal characteristics include a maximum clock frequency of 16 MHz, processing performance up to 16 MIPS, 8 KB of program Flash, and approximately 41 I/O ports. According to the STMicroelectronics product page, the enhanced STM8 core increases processing power while retaining the architecture's straightforward embedded-control focus. Operation from 1.8 V to 3.6 V also allows integration with low-energy sensor nodes and modern 3.3 V system rails.
The device's 32-pin UFQFPN package provides a compact surface-mount solution with an exposed pad. Its small land pattern is useful in space-constrained products, although thermal design, soldering profile, and exposed-pad layout must follow the manufacturer's package guidance. The specified temperature options cover −40 °C to 85 °C or −40 °C to 125 °C, supporting both commercial and extended-temperature industrial designs.
Typical applications include low-power sensor nodes, building and industrial control modules, compact instrumentation, battery-operated accessories, and IoT equipment that periodically wakes to acquire and process data. The 8-bit architecture is especially effective for control loops, user-interface handling, communications, and peripheral coordination where simple instruction execution and deterministic behavior are more important than high computational throughput.
When laying out a circuit, treat the exposed thermal pad and its via pattern as part of the electrical and thermal design rather than as an optional copper feature. Confirm pin functions, decoupling requirements, programming connections, and operating limits against the manufacturer datasheet for the exact ordering code before releasing the PCB.
This page combines the manufacturer product information with package, application, purchasing, and drop-in replacement guidance to help engineers evaluate the STM8L151K3U6 before schematic capture and PCB layout.
ドロップイン代替品: STM8L151K3U6 — 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: STM8L151K3U6 （同一形状・フットプリント） — 相違点: CPU Architecture, Package, Flash Memory, Product Type, Series.
STM8L151K2U6
✅ 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 →STM8L151K2U3
✅ ドロップイン📋 参考代替品（カタログ未掲載）
STM8L151K4U6
✅ ドロップイン📋 参考代替品（カタログ未掲載）
STM8L151K6U6
✅ 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 →STM8L152K6U6
✅ ドロップイン価格はお問い合わせください
データシートを見る →STM8L151K3U6 最大定格＆電気的特性
| Product Type | 8-bit ultra-low-power microcontroller |
| Series | STM8L EnergyLite |
| Maximum CPU Frequency | 16 MHz |
| Maximum Processing Performance | 16 MIPS at 16 MHz |
| Flash Memory | 8 KB (8K x 8) |
| Program Memory Type | Flash |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Nominal Supply Options | 2.5 V or 3.3 V |
| Number of I/O Ports | 41 ports |
| CPU Architecture | 8-bit CISC |
| Package Type | 32-pin UFQFPN (5 x 5 mm) |
| 実装タイプ | Surface mount |
| Temperature Range Options | −40 °C to 85 °C or −40 °C to 125 °C |
| Core | Enhanced STM8 CPU core |
| Low-Power Features | Ultra-low-power operating modes |
| Product Lifecycle Stage | Active |
STM8L151K3U6 32-pin ufqfpn (5 x 5 mm) ピン配置ガイド
STM8L151K3U6 (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: STM8L151K3U6.
詳細は データシート をご参照ください。
主な用途
STM8L151K3U6 の用途: 6 件s: Battery-Powered Sensor Nodes, Industrial Monitoring and Control, Low-Power Environmental Sensing, Smart Home Actuator Modules, Compact Instrumentation, Battery-Operated Accessories.
Battery-Powered Sensor Nodes
The STM8L151K3U6 fits compact battery-powered sensor nodes because it combines an 8-bit STM8 core operating up to 16 MHz with ultra-low-power operating modes and a 1.8 V to 3.6 V supply range. The device can remain available for periodic measurement, wake to process sensor data, and return to a low-power state between events. Its 8 KB Flash capacity is suitable for tightly bounded acquisition, filtering, thresholding, and communication-control firmware. Battery-life design should still account for sensor standby current, regulator losses, wake duration, and radio activity, because the MCU rating alone does not determine total power consumption.
おすすめ
Industrial Monitoring and Control
The STM8L151K3U6 is appropriate for compact industrial monitoring modules that digitize sensor channels, operate relays or indicators, and report status through a serial interface. Its 16 MHz maximum clock provides up to 16 MIPS of processing performance for event handling, while approximately 41 I/O ports offer broad connection flexibility. The available −40 °C to 85 °C or −40 °C to 125 °C grades support different environmental requirements. For motor, solenoid, or high-energy actuator outputs, use suitable protection and driver circuitry rather than driving loads directly from microcontroller pins.
おすすめ
Low-Power Environmental Sensing
The STM8L151K3U6 can serve as the control microcontroller in environmental sensing assemblies that sample temperature, humidity, light, or gas sensors. Its 1.8 V minimum operating voltage supports low-voltage sensor ecosystems, and the 8-bit architecture is well matched to averaging, calibration, threshold evaluation, and data-frame preparation. The 8 KB Flash footprint encourages compact firmware, although developers should reserve memory for boot code, protocol updates, diagnostics, and future revisions. Place sensitive analog inputs away from switching nodes and use a quiet reference or suitable isolation strategy when measuring low-level signals.
おすすめ
Smart Home Actuator Modules
The STM8L151K3U6 is well suited to smart-home actuator modules that combine local user controls, status LEDs, safety monitoring, and a low-speed serial communications link. Its 41 I/O ports can support buttons, indicators, and logic-level interfaces, while the 16 MHz core provides sufficient responsiveness for debouncing and state-machine control. The 1.8 V to 3.6 V operating range simplifies integration with low-energy system rails. A mains-connected actuator requires certified isolation, switching components, and protective layout; the STM8L151K3U6 should remain on the properly separated control domain.
おすすめ
Compact Instrumentation
The STM8L151K3U6 can support compact instrumentation products that acquire measurements, perform local calculations, drive a small display, and expose data through a communications interface. The 8-bit core running up to 16 MHz is suitable for control-oriented signal processing, while the small 5 x 5 mm UFQFPN package preserves board area. Its 8 KB Flash memory favors concise algorithms and may require careful code-size budgeting. For precision analog measurement, use a dedicated converter and pay attention to reference quality, grounding, input filtering, and separation from display or switching circuitry.
おすすめ
Battery-Operated Accessories
The STM8L151K3U6 can manage power functions and user interactions in battery-operated accessories such as portable instruments, wellness devices, and compact control accessories. Its ultra-low-power architecture supports designs that spend most of their time idle and activate briefly for button evaluation, measurement, or communications. The 8-bit core remains effective for state-machine control, while the compact 32-pin package limits PCB footprint. Designers should select the appropriate voltage regulator for the battery chemistry, account for startup and brownout behavior, and validate low-current operation across the intended temperature grade.
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: STM8L151K3U6 — 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 | STM8L151K2U6 | STM8L151K2U3 | STM8L151K4U6 | STM8L151K6U6 | STM8L152K6U6 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| 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) | 32-pin UFQFPN (5 x 5 mm) | 32-pin UFQFPN (5 x 5 mm) |
| Maximum CPU Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| CPU Architecture | 8-bit STM8 enhanced core | 8-bit STM8 enhanced core | 8-bit STM8 enhanced core | 8-bit STM8 enhanced core | 8-bit STM8 enhanced core | 8-bit STM8 enhanced core |
| Flash Memory | 8 KB | 8 KB | 8 KB | 16 KB | 32 KB | 32 KB |
| Supply Voltage Range | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Temperature Grade | −40 °C to 85 °C or −40 °C to 125 °C | −40 °C to 125 °C | −40 °C to 85 °C | −40 °C to 125 °C | −40 °C to 125 °C | −40 °C to 125 °C |
| Special Features | Ultra-low-power STM8L EnergyLite operation | Ultra-low-power STM8L operation | Ultra-low-power STM8L operation | Ultra-low-power STM8L operation | Ultra-low-power STM8L operation | STM8L low-power operation with a different peripheral mix |
主な差別化要因
- Lower Flash capacity provides a tightly bounded 8 KB firmware target （vs STM8L151K4U6)
- Matches the lower-density STM8L151 family while retaining a 16 MHz-class control core （vs STM8L151K2U6)
- Uses a substantially smaller Flash allocation than higher-density siblings （vs STM8L152K6U6)
設計ノート
Assign the exposed pad as a thermal and electrical connection according to the manufacturer package drawing, and place its thermal vias close to the pad while maintaining the recommended clearance from sensitive signal paths. Keep the 32-pin UFQFPN footprint and paste pattern tied to the exact 5 x 5 mm package dimensions. Because the MCU operates from 1.8 V to 3.6 V, place local supply and ground connections before distributing power to peripheral circuitry.
Decouple each supply pin near the device with the capacitance and ESR range specified in the manufacturer datasheet. Avoid long supply traces between the decoupling capacitor and the UFQFPN pads, since inductance in that path can produce transient voltage excursions during fast switching. Design the power rail for the 16 MHz operating mode and the highest expected peripheral load rather than evaluating it only while the MCU is sleeping.
Keep clocks, programming signals, serial interfaces, and sensor inputs away from the exposed-pad thermal-via field where practical. Use a continuous ground reference beneath the device and route high-current or switching-node returns so they do not share narrow paths with analog measurement inputs. The 41 available I/O ports simplify partitioning, but assigned functions and alternate-function capabilities must be checked against the exact pin-description table.
Do not assume that every K-series suffix is firmware-compatible merely because the package dimensions match. The K2, K3, K4, and K6 parts occupy different Flash-density positions, while STM8L152 parts have a different peripheral mix. Before substitution, compare the memory map, interrupt vectors, peripheral registers, startup behavior, package dimensions, temperature grade, and application requirements. The manufacturer's ordering information and datasheet remain the controlling documents.
コンプライアンス情報
The manufacturer identifies the STM8L151K3 family as active and lists low-power features, but the available component records do not explicitly establish the requested environmental, material, or automotive qualification statuses.