STM8L151K3U6 - 16MHz 8KB Low-Power MCU | STMicroelectronics
Référence : STM8L151K3U6 ✓ ActifSTM8L151K3U6 Présentation
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.
Alternatives de remplacement direct pour STM8L151K3U6 — 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 STM8L151K3U6 (même facteur de forme et même empreinte) — différant par CPU Architecture, Package, Flash Memory, Product Type, Series.
STM8L151K2U6
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →STM8L151K2U3
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM8L151K4U6
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM8L151K6U6
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →STM8L152K6U6
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →STM8L151K3U6 Valeurs maximales et caractéristiques électriques
| 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) |
| Type de montage | 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 |
Guide de configuration des broches du STM8L151K3U6 32-pin ufqfpn (5 x 5 mm)
Configuration des broches du STM8L151K3U6 (boîtier 32-pin ufqfpn (5 x 5 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 STM8L151K3U6.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
STM8L151K3U6 convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour STM8L151K3U6 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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)
Notes de conception
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.
Informations de conformité
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.