STM8L151C3T6 - 16MHz 8KB Ultra-Low-Power MCU | STMicroelectronics
MPN: STM8L151C3T6 ✓ ActiveSTM8L151C3T6 Overview
An ultra-low-power microcontroller is an embedded semiconductor that minimizes energy consumption during active operation and low-power states. The STM8L family belongs to the broader hierarchy of MCU, microcontroller, embedded processor, and semiconductor. Its enhanced STM8 CPU core combines an 8-bit architecture with performance capable of reaching 16 MIPS at 16 MHz, making the STM8L151C3T6 suitable for compact control nodes, sensor interfaces, consumer equipment, and low-power embedded products.
The verified device features include 8 KB of Flash memory, a 16 MHz operating frequency, 2.5 V or 3.3 V supply operation, two comparators, and three PWM channels. Its 48-LQFP package provides 48 externally accessible pins and is supplied in a tray according to the FindIC product listing. These specifications support designs requiring more I/O and routing flexibility than smaller 32-pin or 20-pin microcontroller packages.
The STM8L151C3T6 combines general-purpose embedded control with energy-conscious operation. Its 8-bit STM8 core is appropriate for supervisory loops, actuator control, signal conditioning, and communication-intensive embedded functions where deterministic peripheral access and low standby consumption are important. The manufacturer identifies the STM8L151x2/3 devices as ultra-low-power products with an enhanced STM8 CPU core providing increased processing power up to 16 MIPS at 16 MHz.
Typical applications include battery-powered sensors, industrial control modules, building automation endpoints, compact metering equipment, consumer accessories, and low-power communication controllers. The 48-LQFP package is especially useful when a design requires a larger pin count while remaining compatible with surface-mount manufacturing and leaded-package inspection processes.
Designers should verify the complete pin assignments, peripheral multiplexing, startup configuration, decoupling requirements, and absolute maximum ratings in the manufacturer datasheet before layout. They should also confirm programming, debug, clock, and low-power-mode requirements against the target board. Because the verified excerpts do not provide complete electrical tables or a published pin map, those details remain explicitly marked as data needed rather than inferred.
This page consolidates verified manufacturer and distributor information, package details, sourcing references, and a conservative drop-in comparison for the STM8L151C3T6. It distinguishes confirmed substitutions from unavailable data and highlights the memory, speed, voltage, comparator, PWM, and packaging constraints that matter during component selection.
Drop-in alternatives for STM8L151C3T6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM8L151C3T6 (same form factor and footprint) — differing in Operating Supply Voltage, Product Type.
STM8L151C3T3
✅ Drop-InContact for price
View Datasheet →STM8AL3138TCX
✅ Drop-In📋 Reference alternative (not in catalog)
STM8L151C3T6 Maximum Ratings & Electrical Characteristics
| Product Type | Ultra-low-power 8-bit microcontroller |
| Series | STM8L EnergyLite |
| CPU Core | Enhanced STM8 8-bit core |
| Maximum CPU Performance | 16 MIPS at 16 MHz |
| Maximum Clock Frequency | 16 MHz |
| Flash Memory | 8 KB (8K x 8) |
| Operating Supply Voltage | 2.5 V to 3.6 V |
| Comparator Count | 2 |
| PWM Channel Count | 3 |
| Package | 48-LQFP (7 x 7 mm) |
| Pin Count | 48 pins |
| Mounting Type | Surface mount |
| Terminal Type | Gull wing |
| Temperature Grade | Industrial |
| Manufacturer Pack | Tray |
| Observed Lowest Price | $0.4899 as of 2026-10-28 |
STM8L151C3T6 48-lqfp (7 x 7 mm) Pin Configuration Guide
Pin configuration for STM8L151C3T6 (48-lqfp (7 x 7 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for STM8L151C3T6.
Refer to the datasheet for full pin configuration.
Typical Applications
STM8L151C3T6 is suitable for 6 applications: Battery-Powered Sensor Nodes, Industrial Control Modules, Building Automation Endpoints, Smart Metering and Metering Interfaces, Consumer Accessories and HMI Controls, Low-Power Communication Controllers.
Battery-Powered Sensor Nodes
The STM8L151C3T6 fits compact sensor nodes because it combines a 16 MHz enhanced STM8 core with the STM8L151x2/3 family's ultra-low-power positioning and a 2.5 V to 3.6 V operating range. Its 8 KB of Flash can hold the acquisition logic, sensor compensation, and low-power state machine required for a basic measurement product. Two comparators and three PWM channels are also verified features that can support threshold sensing, indicator control, or simple actuator drive. The design should use the manufacturer's recommended low-power modes, clock configuration, and decoupling. Firmware and current consumption must be evaluated together because the available excerpts do not provide the complete sleep-mode or active-current tables.
Recommended
Industrial Control Modules
The STM8L151C3T6 is appropriate for small industrial control modules that need deterministic 8-bit processing without the overhead of a higher-performance processor. Its enhanced STM8 core reaches up to 16 MIPS at 16 MHz according to the STMicroelectronics product page, providing useful headroom for supervisory loops, state machines, and peripheral coordination. The 48-LQFP 7 x 7 mm package exposes more pins than compact low-pin-count packages, while the industrial-grade listing supports deployment planning in controlled environments. Two comparators can assist with simple threshold supervision, and three PWM channels can support basic motor or lighting functions. Actual EMC performance, temperature limits, isolation, and protection requirements remain application-specific and must be checked against the official datasheet.
Recommended
Building Automation Endpoints
The STM8L151C3T6 can serve as the controller in a building-automation endpoint that coordinates sensor inputs, relay or valve commands, and status feedback. The 16 MHz STM8 core provides enough control throughput for peripheral scheduling, while the STM8L151x2/3 family's ultra-low-power operation is valuable in equipment expected to remain connected to intermittent or battery power. Its three verified PWM channels can support low-rate actuators, while two comparators can perform basic threshold or interface conditioning. The 48-LQFP footprint is helpful where several external interfaces are needed without moving to a very large package. Designers should account for isolation, surge protection, relay transients, and the voltage limits of each attached field interface rather than relying on MCU specifications alone.
Recommended
Smart Metering and Metering Interfaces
The STM8L151C3T6 is suitable for metering-interface hardware where the primary MCU must collect measurements, run calibration logic, and manage a display or communication peripheral while keeping power consumption low. Its 8 KB Flash provides space for a focused embedded application, and the 16 MHz CPU supports responsive task execution without a larger clock demand. Two comparators may assist with threshold detection or signal conditioning, and the three PWM channels can drive display or indicator functions. The 48-LQFP package provides additional routing flexibility for communication, measurement, and supply circuitry. Metering designs must still verify accuracy-related analog requirements, communication timing, calibration storage, and regulatory obligations independently; those specifications are not included in the supplied verified excerpts.
Recommended
Consumer Accessories and HMI Controls
The STM8L151C3T6 fits compact consumer accessories requiring local control, button handling, status indication, and low standby power. The 8-bit architecture is appropriate for simple human-machine-interface logic, and the STM8L family reduces processing overhead compared with using a more capable MCU. Three PWM channels can control indicator levels or small actuator outputs, while two comparators support simple sensing decisions. The 48-LQFP 7 x 7 mm package allows several control signals to be routed without using a very fine-pitch package, although it is larger than some consumer designs require. Engineers should validate standby-current targets, ESD requirements, actuator drive topology, and enclosure-related thermal conditions because those parameters are outside the verified distributor summaries.
Recommended
Low-Power Communication Controllers
The STM8L151C3T6 can act as a low-power controller beneath a communications module, handling packet framing, device state, timers, and local I/O. Its enhanced STM8 core can execute up to 16 MIPS at 16 MHz, while the STM8L151x2/3 family's ultra-low-power operation is valuable in endpoint equipment with long idle periods. The 48-LQFP package offers enough pins for a radio interface, status indicators, and supervision inputs. Two comparators and three PWM channels support auxiliary functions beyond the communication interface. Designers must budget firmware execution time, interrupt latency, RAM usage, and radio supply duty cycle. They should also verify the complete STM8L151C3T6 electrical and memory-map details in the manufacturer datasheet before finalizing firmware or the PCB.
Recommended
Recommended Products Summary
Engineering reference data for STM8L151C3T6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8L151C3T3 | STM8AL3138TCX |
|---|---|---|---|
| Package | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| CPU Architecture | Enhanced STM8 8-bit core | STM8L 8-bit core | STM8AL 8-bit core |
| Flash Memory | 8 KB (8K x 8) | 8 KB | 8 KB |
Key Differentiators
- Directly identified STM8L ultra-low-power family (vs STM8AL3138TCX)
- Verified CPU performance specification (vs STM8L151C3T3)
- Complete set of confirmed peripheral counts (vs STM8AL3138TCX)
- Verified observed procurement price (vs STM8L151C3T3)
Design Notes
Design the STM8L151C3T6 power rail around the verified 2.5 V to 3.6 V operating range and confirm which low-power states the finished product will use. Place the manufacturer's recommended supply and ground decoupling capacitors close to the device pins, with the ground return following a low-impedance path. Because the supplied excerpts do not include active-current or sleep-current tables, calculate the average consumption from the final operating-state budget rather than assuming a generic STM8 current level.
Use the official STMicroelectronics 48-LQFP land pattern and pin numbering before routing. A 7 x 7 mm LQFP can create short escape routes for its 48 pins, but fanout still requires careful decoupling placement and thermal-pad assessment where applicable. Do not derive a pin map from the package dimensions alone; verify every power, ground, reset, clock, programming, and peripheral signal against the manufacturer package drawing.
Do not treat a shared package name as proof of drop-in compatibility. The verified STM8L151C3T3 comparison states that some electrical characteristics differ, and the STM8AL3138TCX uses a different STM8 family feature set. Before replacing the STM8L151C3T6, compare the complete ordering code, pin table, alternate functions, clock limits, memory map, interrupt behavior, bootloader support, and electrical limits. Firmware may also require source-level changes even when the footprint matches.
Keep switching nodes, high-current actuator outputs, and sensitive sensor inputs separated from the MCU supply and signal paths. If the board drives relays, motors, or solenoids, use the board's established protection and isolation strategy rather than routing transient current near the STM8L151C3T6. Confirm ground-reference relationships for the two comparators and three PWM channels so their external analog and return connections do not create unintended current paths.
Compliance Information
The supplied excerpts identify an industrial temperature grade but do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is recorded as not applicable because this is a general-purpose microcontroller rather than an automotive-qualified claim in the provided data.