STM8L151K2U6 - 16MHz 8-Bit Ultra-Low-Power MCU | STMicroelectronics
MPN： STM8L151K2U6 ✓ 啟用中STM8L151K2U6 概覽
An STM8L is an ultra-low-power microcontroller family within the wider microcontroller and embedded-processing hierarchy. It combines a simple 8-bit CISC architecture with power-management features intended for battery-operated and always-on equipment. The STM8L151x2 and STM8L151x3 devices share the low-density platform, while the K2 designation identifies this 32-pin, 4 KB Flash configuration. This combination allows designers to use the same MCU family for sensing, control, communication, and low-power monitoring functions.
The STM8L151K2U6 operates from a 1.8 V to 3.6 V supply, as stated by the manufacturer product information, and provides a maximum clock speed of 16 MHz. Its 41 I/O ports support compact embedded layouts, while the 12-bit and 30-bit peripheral capabilities referenced in the product listing support common control and measurement tasks. The low-power architecture is useful for sensor nodes, industrial controls, portable instruments, and battery-powered accessories.
The part is identified as an active, ultra-low-power MCU by STMicroelectronics and is offered in a 32-pin UFQFPN package. Its principal engineering trade-off is the modest 4 KB Flash capacity compared with larger STM8 devices. Firmware should therefore be structured for efficient storage, and application requirements involving graphical interfaces, large protocol stacks, or extensive data logging should be reviewed before design freeze.
Typical applications include industrial sensor nodes, low-power wireless-control endpoints, portable measurement products, and embedded accessory controllers. Designers should preserve adequate decoupling close to the supply pins, confirm exposed-pad soldering requirements from the manufacturer datasheet, and validate low-power modes against the actual sensor and communication load. These measures help preserve the intended low-power behavior while maintaining signal integrity and reliable startup.
This page organizes the manufacturer product information, distributor listing details, package characteristics, and application guidance for engineers evaluating STM8L151K2U6. It also highlights the memory-density limitation, supply-voltage range, low-power positioning, and practical PCB considerations that distinguish this MCU from larger STM8L variants.
直接替換替代品，適用於 STM8L151K2U6 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
STM8L151K2U3
✅ 直接替換📋 參考替代品（不在目錄中）
STM8L151K4U6
✅ 直接替換📋 參考替代品（不在目錄中）
STM8L151K2U6 最大額定值與電氣特性
| Product Type | 8-bit ultra-low-power microcontroller |
| Core | Enhanced STM8 CPU core |
| Maximum Clock Speed | 16 MHz |
| Maximum Processing Performance | 16 MIPS at 16 MHz |
| Flash Memory | 4 KB |
| Program Memory Organization | 4K x 8 |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Number of I/O Ports | 41 |
| ADC Resolution | 12-bit |
| Timer Resolution | 30-bit |
| 封裝 | 32-pin UFQFPN (5 mm x 5 mm) |
| 安裝類型 | Surface mount |
| Instruction Architecture | 8-bit CISC |
| Product Family | STM8L EnergyLite |
| 生命週期狀態 | Active |
STM8L151K2U6 32-pin ufqfpn (5 mm x 5 mm) 腳位配置指南
STM8L151K2U6（32-pin ufqfpn (5 mm x 5 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： STM8L151K2U6.
請參閱 資料表 以查看完整腳位配置。
典型應用
STM8L151K2U6 適用於 6 應用s: Industrial Sensor Nodes, Battery-Powered Portable Instruments, Low-Power Monitoring and Control, Embedded Accessory Controllers, Industrial Automation Modules, Communication-Assisted Sensor Endpoints.
Industrial Sensor Nodes
The STM8L151K2U6 fits compact industrial sensor nodes that require an 8-bit controller, 1.8 V to 3.6 V operation, and up to 16 MHz processing speed. Its 41 I/O ports provide substantial connectivity for digital sensors, status indicators, and local actuators within a 5 mm by 5 mm footprint. Place the MCU near the sensor interface and isolate analog routing to reduce coupling. The 4 KB Flash limit requires disciplined firmware sizing, so confirm the final linked image and reserve memory for calibration, diagnostics, and field updates before layout release.
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Battery-Powered Portable Instruments
For battery-powered portable instruments, the STM8L151K2U6 provides an efficient combination of a 16 MHz STM8L core, low-voltage operation, and low-power family positioning. It can manage measurements, user inputs, and simple control functions without the memory demand of a larger MCU. Use its low-power operating modes only after measuring wake-up and sleep currents in the completed product. A low-quiescent regulator, efficient sensor shutdown behavior, and careful GPIO state management are needed to achieve the intended battery life.
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Low-Power Monitoring and Control
The STM8L151K2U6 suits monitoring and control modules that periodically sample a sensor, evaluate a threshold, and update an actuator or indicator. Its 12-bit and 30-bit peripheral capabilities provide useful foundations for measurement and timing tasks, while the 16 MHz maximum clock supports responsive control logic. Keep analog and digital return paths separated, provide local decoupling, and define unused pins deliberately. Confirm peripheral mapping and low-power transitions in the manufacturer pin-description and electrical-characteristics documentation.
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Embedded Accessory Controllers
A compact accessory controller can use the STM8L151K2U6 to supervise buttons, indicators, communication interfaces, and simple power-management signals. Its 32-pin UFQFPN package helps reduce board area, and its 41 I/O ports support multiple external functions without moving immediately to a larger pin count. Because only 4 KB of Flash is available, avoid placing large UI or protocol libraries in the MCU when a companion processor is a better fit. Validate exposed-pad assembly and inspectability under the product’s manufacturing process.
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Industrial Automation Modules
The STM8L151K2U6 can act as the local controller in a small industrial automation module, handling discrete inputs, output sequencing, and communication support. Operation down to 1.8 V provides flexibility for regulated control rails, while the enhanced STM8 core reaches up to 16 MIPS at 16 MHz. Use a dedicated protection network for exposed industrial connections and do not rely on general-purpose GPIO ratings for surge events. The active lifecycle status supports ongoing sourcing, subject to current channel confirmation.
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Communication-Assisted Sensor Endpoints
The STM8L151K2U6 is appropriate for compact sensor endpoints that manage a low-speed serial link, local filtering, and actuator output. The 16 MHz clock provides enough performance for lightweight protocols, while the compact 5 mm by 5 mm UFQFPN package leaves board area for a radio or sensor. Check each peripheral pin, supply rail, and bus pull-up against the selected communication device. Firmware partitioning should keep protocol buffers within the device’s limited memory and retain a recovery path for field servicing.
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推薦產品摘要
工程參考資料，適用於 STM8L151K2U6 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | STM8L151K2U3 | STM8L151K4U6 |
|---|---|---|---|
| Package | 32-pin UFQFPN (5 mm x 5 mm) | 32-pin UFQFPN (5 mm x 5 mm) | 32-pin UFQFPN (5 mm x 5 mm) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
主要差異化特點
- Compact low-density configuration (對比STM8L151K4U6)
- Same-family replacement path (對比STM8L151K2U3)
- Low-power STM8L architecture (對比STM8L151K4U6)
設計說明
Design the power tree around the STM8L151K2U6 operating range of 1.8 V to 3.6 V. Keep the MCU rail within its specified limits during startup, sleep transitions, and peripheral load changes. Place the closest supply bypass capacitors directly beside the relevant package pins, maintain short return paths, and verify regulator stability with the actual input and output capacitors. Estimated: no power-dissipation value is stated because the final supply voltage, load current, and board thermal conditions are not specified.
Use the official UFQFPN land pattern and exposed-pad recommendations rather than generating the footprint from package dimensions alone. The STM8L151K2U6 is a 32-pin 5 mm by 5 mm surface-mount device with fine-pitch leads and an exposed thermal area. Confirm the exact pin-1 orientation, pin pitch, pad dimensions, solder-mask policy, and paste pattern against the current manufacturer package drawing. Review the board for assembly inspection and adequate copper around the exposed pad.
The main design risk is firmware growth beyond the 4 KB Flash limit. Build the complete production image early, including drivers, communication code, diagnostics, and bootloader requirements, and reserve space for revision changes. Also verify the exact ordering suffix and temperature grade because STM8L151K2U3 and STM8L151K4U6 cannot be approved solely from their family names. A documented pin, memory, supply, and lifecycle comparison is required before substitution.
Separate sensitive analog inputs from fast-switching and high-current paths, even when the application is primarily digital. Route ground returns without splits under the MCU, keep decoupling loops compact, and position external timing or communication circuits near their assigned pins. For a low-power sensor node, define every GPIO state during reset and sleep so floating inputs do not create unintended current. Prototype the complete sleep-and-wake sequence because peripheral state can dominate the final energy budget.
合規資訊
The manufacturer product information identifies the STM8L151K2 family as active. Formal RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals declarations require confirmation from current manufacturer documentation.
