Item specifics
Description
The STM8L051F3P6 is an ultra-low-power value line 8-bit microcontroller from STMicroelectronics, belonging to the STM8L EnergyLite low-density product family. Featuring an enhanced STM8L core operating up to 16 MHz (16 MIPS), the chip integrates 8 KB Flash, 1 KB RAM, and 256 bytes of data EEPROM with ECC. It supports five ultra-low-power modes with Halt current as low as 350 nA. The device includes a 12-bit ADC (10 channels), 4-channel DMA controller, low-power RTC, rich timers, and multiple communication interfaces, all in a compact TSSOP-20 package with up to 18 user I/Os. The STM8L051F3P6 is ideal for battery-powered devices, industrial sensors, and IoT nodes where power, cost, and space constraints are critical.
Ultra-Low-Power Architecture: Five low-power modes including Wait, Low-power run (5.1 μA), Low-power wait (3 μA), Active-halt with RTC (1.3 μA), and Halt (350 nA); ultra-low leakage per I/O: 50 nA; fast wakeup from Halt: 5 μs Enhanced STM8L Core: 16 MHz CPU delivering up to 16 MIPS, leveraging Harvard architecture and 3-stage pipeline, maintaining CISC architecture advantages with improved code density and 24-bit linear addressing space Integrated Memory: 8 KB Flash program memory, 1 KB RAM, and 256-byte data EEPROM with ECC, supporting up to 100k erase/write cycles with flexible write and read protection modes 12-bit ADC (10 Channels): Built-in 12-bit SAR ADC up to 1 Msps with 10 external input channels and internal reference voltage, paired with a 4-channel DMA controller supporting ADC, SPI, I2C, USART, and timers for efficient data transfer Low-Power RTC: BCD calendar with alarm interrupt, digital calibration with ±0.5 ppm accuracy, LSE security system, and auto-wakeup from Halt with periodic interrupt Flexible Communication Interfaces: Supports SPI synchronous serial interface, Fast I2C (400 kHz SMBus/PMBus), USART, and IrDA infrared communication Rich Timer Resources: Two 16-bit general-purpose timers (supporting input capture, output compare, PWM, quadrature encoder), one 8-bit basic timer, beeper timer, and two watchdogs (Window + Independent) TSSOP-20 Package: Compact TSSOP-20 footprint (6.6 × 4.5 mm) with up to 18 user I/Os, all mappable on interrupt vectors, supporting up to 40 external interrupt sources High Reliability Design: Built-in ultra-low-power POR/PDR, ultra-safe BOR reset with 5 selectable thresholds, programmable voltage detector (PVD), clock security system; I/O ports feature latch-up immunity and ESD protection Wide Voltage & Temperature Range: Operating voltage from 1.8 V to 3.6 V; ambient temperature range -40 °C to +85 °C, industrial temperature grade Fast Development Support: Integrated SWIM single-wire debug module supporting non-intrusive in-application debugging and ultra-fast Flash programming; also supports bootloader via USART
Industrial Sensor Nodes: Ideal for industrial field sensor signal acquisition and simple control tasks (temperature, pressure, proximity), with rich ADC channels and wide temperature range ensuring reliable operation Battery-Powered Devices: Smart metering (water, gas, heat meters), remote controls, portable medical monitors, and other battery-powered devices; 350 nA Halt enables multi-year coin-cell operation Smart Home & IoT: Smart lighting, access cards, wireless sensor nodes, home automation nodes, and other compact consumer applications Consumer Electronics & Toys: Electronic toys, small accessories, e-bike controllers, battery chargers, and other cost-sensitive and power-sensitive products Embedded Systems: Simple data acquisition modules, sensor interface boards, low-pin-count embedded control nodes
Extreme Low Power for Long Battery Life: 350 nA Halt, 5.1 μA Low-power run, and 50 nA leakage per I/O enable multi-year operation from a single coin cell, significantly reducing maintenance DMA Boosts Efficiency: 4-channel DMA controller enables direct data transfer between ADC, SPI, I2C, USART, timers and memory, freeing up CPU resources and further optimizing system efficiency in low-power scenarios High Integration in Small Package: TSSOP-20 package integrates 10-channel 12-bit ADC, DMA, EEPROM, RTC, and multiple comm interfaces with up to 18 user I/Os, greatly saving PCB area and BOM costs Rich Analog Peripherals: 10-channel 12-bit ADC, internal reference voltage, dual watchdogs, and low-power RTC provide exceptional flexibility for sensor acquisition and threshold detection Wide-Temp Industrial Reliability: -40 °C to +85 °C range combined with 5-level BOR and ESD protection ensures stable, reliable operation in industrial fields Flexible Power/Performance Mix: Five low-power modes and high-performance 16 MHz operation allow on-demand switching, using exactly the energy needed for the task Mature STM8 Ecosystem: Leveraging the classic STM8S/STM8L architecture with rich documentation and active community, supported by low-cost SWIM debugging tools and reference designs, simplifying development Value Line Cost Advantage: As a member of the STM8L value line, delivers ultra-low-power performance and rich peripherals at a highly competitive cost Fast Wake-up for Instant Response: As fast as 5 μs wake-up from Halt mode rapidly handles interrupts, processes data, and re-enters sleep, further compressing average power consumption
Years of experience in the electronics industry. Trusted by global customers.
Massive In-Stock Inventory – Ready to ship promptly
BOM Matching Service – One-stop solution, save time
PCBA Customization – Professional engineering team creates tailor-made solutions based on your needs
Cost-Effective & Efficient – Better channel, better cost
A dedicated team makes your procurement smoother.
Contact us for BOM quotes or PCBA inquiries
FAQ:
What is the STM8L051F3P6 and its key specifications?
The STM8L051F3P6 is an ultra‑low‑power 8‑bit microcontroller from STMicroelectronics based on the STM8L core at up to 16 MHz. It provides 8 KB of Flash program memory, 1 KB of SRAM, and 256 bytes of true data EEPROM. Key peripherals include a 12‑bit ADC (up to 10 external channels), two comparators, general‑purpose timers (TIM2, TIM3, TIM4), a real‑time clock (RTC) with calendar, and communication interfaces: USART, SPI, I2C. It comes in a tiny TSSOP‑20 package with 16 I/O pins and operates over ‑40 °C to +85 °C. This MCU does not include DMA, DAC, LCD controller, or AES encryption, making it a streamlined, cost‑optimized solution for basic ultra‑low‑power sensing and control applications.
How does the STM8L051F3P6 differ from the STM8L151F3P6?
The STM8L151F3P6 is a higher‑feature version in the same STM8L family. The main differences are: the L151F3P6 includes a 12‑bit DAC and a 4‑channel DMA controller, while the L051F3P6 has no DAC and no DMA. Both share identical memory sizes (8 KB Flash, 1 KB SRAM, 256 bytes EEPROM), the same 12‑bit ADC with up to 10 channels, two comparators, RTC, and communication interfaces. The L051F3P6 is a more cost‑effective choice for applications that do not need analog voltage output or hardware‑assisted data transfers; the L151F3P6 is better when a DAC or DMA is required.
What is the difference between STM8L051F3P6 and STM8L052F3P6?
Both share the same core, memory (8 KB Flash, 1 KB SRAM, 256 bytes EEPROM), and basic peripherals (12‑bit ADC, comparators, timers, USART/SPI/I2C). The only significant difference is the LCD controller. The STM8L052F3P6 integrates a hardware LCD driver capable of driving up to 4 commons × 8 segments (in the 20‑pin package), while the STM8L051F3P6 has no LCD controller. Both lack DAC and DMA. Choose the L052 if your application needs a small segment display; otherwise, the L051 is the more economical option.
What ultra‑low‑power modes does the STM8L051F3P6 offer?
It delivers excellent power efficiency. In Run mode at 1 MHz, the current is about 195 µA. It drops to 5.1 µA in Low‑power run mode. Active‑halt mode with the RTC running draws only 1.0 µA, and full Halt mode consumes as little as 0.35 µA (typical). The fast wake‑up from these modes makes the chip ideal for coin‑cell‑powered sensors and meters that must operate for years without a battery change.
Can the STM8L051F3P6 drive a brushless DC motor?
No. The STM8L051F3P6 does not include an advanced‑control timer with complementary PWM outputs and dead‑time insertion. It provides general‑purpose timers (TIM2, TIM3, TIM4) that can generate standard PWM signals for DC motors, servo control, or LED dimming. For three‑phase BLDC motor control, an external gate driver with built‑in dead‑time is required, or you can switch to an STM8S/STM32 series MCU with a motor‑control timer.
What are the ADC specifications and how many analog channels does the STM8L051F3P6 have?
It features a 12‑bit successive‑approximation ADC. In the TSSOP‑20 package, up to 10 external analog input channels are internally supported, though the actual number accessible depends on pin multiplexing; typically 5 to 8 channels can be used simultaneously. The ADC can also measure an internal voltage reference. There is no on‑chip DAC; analog output must be generated externally.
How much memory does the STM8L051F3P6 have?
It provides 8 KB of Flash program memory, 1 KB of SRAM, and 256 bytes of true data EEPROM. The EEPROM offers reliable, high‑endurance storage for calibration constants. This memory configuration is perfect for highly optimized, single‑purpose firmware in ultra‑compact, battery‑powered devices.
What package does the STM8L051F3P6 use and how many I/O pins are there?
It comes in a compact TSSOP‑20 package (6.5 mm × 4.4 mm, 0.65 mm lead pitch) and provides up to 16 general‑purpose I/O pins. The gull‑wing leads are easy to hand‑solder, making this MCU popular for prototyping and small‑ to medium‑volume production.
What is the supply voltage range of the STM8L051F3P6? Can it be powered by a coin cell?
The operating voltage is 1.8 V to 3.6 V, which is ideal for a single CR2032 coin cell or two alkaline AAA batteries. The MCU includes a low‑voltage reset (BOR) with programmable thresholds to ensure safe operation as the battery discharges. 5 V is not supported; a voltage regulator is required if 5 V components are present.
How to program and debug the STM8L051F3P6? What are its typical applications?
Programming and debugging use the single‑wire SWIM interface, with a low‑cost ST‑LINK/V2 as the standard tool. Firmware can be developed with STVD + Cosmic C or the open‑source SDCC compiler, and ST provides the STM8L15x standard peripheral library. Typical applications include compact sensor nodes, battery‑powered wireless endpoints, simple metering devices, portable medical accessories, and any space‑limited, low‑power application that needs a small 12‑bit ADC but does not require a DAC, DMA, or encryption.